5.7.1 solver doing max coeff loops.

July 1, 2005, 12:50

Hello people,

Have you ever seen a case that the residuals (U,V,W,P) converge in the inner coefficent loops but the solver keeps doing the maximum set coeff. loops for every time step in a transient simulation? Details of the ccl is given below:

 SOLVER CONTROL:
 ADVECTION SCHEME:
 Blend Factor = 0.75
 Option = Specified Blend Factor
 END
 CONVERGENCE CONTROL:
 Maximum Number of Coefficient Loops = 5
 END
 CONVERGENCE CRITERIA:
 Residual Target = 5e-05
 Residual Type = RMS
 END
 TRANSIENT SCHEME:
 Option = Second Order Backward Euler
 END
 END

As stated, I have defaults definitions (i.e. no expert parameters) but the solver keeps solving all 5 coeff. loops as can be seen in the output presented.

<BODY LANG="en-US" DIR="LTR"> 

 ============================================= =========================
 TIME STEP = 230 SIMULATION TIME = 2.12E-01 CPU SECONDS = 8.31E+05
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 1
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 1.02 | 1.9E-04 | 3.7E-03 | 1.6E-02 OK|
 | V-Mom | 1.00 | 2.0E-04 | 4.0E-03 | 5.5E-03 OK|
 | W-Mom | 1.00 | 1.9E-04 | 3.7E-03 | 1.7E-02 OK|
 | P-Mass | 0.92 | 1.0E-05 | 1.1E-03 | 24.3 5.4E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 0.67 | 5.2E-04 | 3.5E-02 | 10.9 7.3E-02 OK|
 | vv-RS | 1.02 | 4.0E-04 | 1.4E-02 | 10.9 6.8E-02 OK|
 | ww-RS | 0.79 | 8.0E-04 | 1.4E-01 | 5.9 6.8E-02 OK|
 | uv-RS | 0.91 | 4.7E-04 | 1.5E-02 | 15.8 4.9E-02 OK|
 | uw-RS | 1.17 | 1.2E-03 | 3.2E-02 | 10.9 7.4E-02 OK|
 | vw-RS | 1.15 | 4.6E-04 | 1.6E-02 | 15.8 4.2E-02 OK|
 | E-Diss.K | 1.49 | 7.1E-04 | 6.0E-02 | 12.3 2.6E-03 OK|
 +----------------------+------+---------+---------+------------------+
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 2 CPU SECONDS = 8.32E+05
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.52 | 1.0E-04 | 1.7E-03 | 1.3E-01 ok|
 | V-Mom | 0.48 | 9.7E-05 | 3.0E-03 | 1.0E-01 ok|
 | W-Mom | 0.53 | 1.0E-04 | 1.8E-03 | 1.3E-01 ok|
 | P-Mass | 1.57 | 1.6E-05 | 1.3E-03 | 10.3 4.8E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 3.00 | 1.6E-03 | 3.9E-02 | 10.9 4.2E-02 OK|
 | vv-RS | 0.87 | 3.5E-04 | 1.0E-02 | 10.9 8.1E-02 OK|
 | ww-RS | 1.67 | 1.3E-03 | 1.0E-01 | 10.9 6.9E-02 OK|
 | uv-RS | 1.33 | 6.2E-04 | 2.0E-02 | 10.9 8.4E-02 OK|
 | uw-RS | 0.27 | 3.3E-04 | 1.9E-02 | 10.9 8.1E-02 OK|
 | vw-RS | 1.22 | 5.6E-04 | 1.8E-02 | 10.9 9.1E-02 OK|
 | E-Diss.K | 0.80 | 5.7E-04 | 8.4E-02 | 12.3 7.3E-03 OK|
 +----------------------+------+---------+---------+------------------+
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 3 CPU SECONDS = 8.32E+05
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.57 | 5.7E-05 | 1.2E-03 | 1.8E-01 ok|
 | V-Mom | 0.55 | 5.4E-05 | 1.6E-03 | 1.3E-01 ok|
 | W-Mom | 0.57 | 5.7E-05 | 1.2E-03 | 1.8E-01 ok|
 | P-Mass | 1.13 | 1.9E-05 | 1.5E-03 | 10.3 2.0E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 0.45 | 7.0E-04 | 2.7E-02 | 10.9 4.7E-02 OK|
 | vv-RS | 1.19 | 4.2E-04 | 2.0E-02 | 10.9 6.5E-02 OK|
 | ww-RS | 1.08 | 1.4E-03 | 3.0E-01 | 5.9 9.6E-02 OK|
 | uv-RS | 0.82 | 5.1E-04 | 1.7E-02 | 10.9 9.5E-02 OK|
 | uw-RS | 3.61 | 1.2E-03 | 3.5E-02 | 10.9 7.1E-02 OK|
 | vw-RS | 0.90 | 5.1E-04 | 1.8E-02 | 10.9 8.4E-02 OK|
 | E-Diss.K | 0.42 | 2.4E-04 | 3.6E-02 | 12.3 3.6E-03 OK|
 +----------------------+------+---------+---------+------------------+
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 4 CPU SECONDS = 8.33E+05
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.78 | 4.4E-05 | 1.5E-03 | 1.7E-01 ok|
 | V-Mom | 0.73 | 3.9E-05 | 1.1E-03 | 1.3E-01 ok|
 | W-Mom | 0.78 | 4.4E-05 | 1.2E-03 | 1.6E-01 ok|
 | P-Mass | 0.54 | 1.0E-05 | 6.1E-04 | 10.3 3.2E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 1.35 | 9.4E-04 | 2.6E-02 | 10.9 6.9E-02 OK|
 | vv-RS | 0.91 | 3.8E-04 | 1.2E-02 | 10.9 8.0E-02 OK|
 | ww-RS | 0.85 | 1.2E-03 | 2.1E-01 | 10.9 6.1E-02 OK|
 | uv-RS | 1.11 | 5.7E-04 | 1.9E-02 | 10.9 8.4E-02 OK|
 | uw-RS | 0.41 | 4.8E-04 | 2.0E-02 | 10.9 7.9E-02 OK|
 | vw-RS | 0.94 | 4.8E-04 | 1.5E-02 | 10.9 8.9E-02 OK|
 | E-Diss.K | 1.06 | 2.6E-04 | 4.0E-02 | 12.3 6.2E-03 OK|
 +----------------------+------+---------+---------+------------------+
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 5 CPU SECONDS = 8.34E+05
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.78 | 3.4E-05 | 1.2E-03 | 1.6E-01 ok|
 | V-Mom | 0.78 | 3.1E-05 | 7.9E-04 | 1.2E-01 ok|
 | W-Mom | 0.82 | 3.6E-05 | 1.4E-03 | 1.6E-01 ok|
 | P-Mass | 0.95 | 9.5E-06 | 1.1E-03 | 10.3 4.3E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 0.65 | 6.1E-04 | 3.2E-02 | 10.9 6.5E-02 OK|
 | vv-RS | 0.90 | 3.4E-04 | 1.5E-02 | 10.9 5.4E-02 OK|
 | ww-RS | 0.60 | 7.3E-04 | 2.3E-02 | 5.9 9.9E-02 OK|
 | uv-RS | 0.65 | 3.7E-04 | 1.2E-02 | 10.9 8.7E-02 OK|
 | uw-RS | 1.97 | 9.4E-04 | 2.6E-02 | 10.9 5.9E-02 OK|
 | vw-RS | 0.93 | 4.4E-04 | 1.8E-02 | 10.9 8.2E-02 OK|
 | E-Diss.K | 0.82 | 2.1E-04 | 2.6E-02 | 12.3 5.9E-03 OK|
 +----------------------+------+---------+---------+------------------+


 ============================================= =========================
 TIME STEP = 231 SIMULATION TIME = 2.13E-01 CPU SECONDS = 8.34E+05
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 1
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.99 | 1.9E-04 | 3.6E-03 | 1.6E-02 OK|
 | V-Mom | 0.99 | 2.0E-04 | 4.0E-03 | 5.4E-03 OK|
 | W-Mom | 0.99 | 1.9E-04 | 3.6E-03 | 1.6E-02 OK|
 | P-Mass | 0.76 | 8.0E-06 | 7.9E-04 | 24.3 5.6E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 2.10 | 1.1E-03 | 3.2E-02 | 10.9 5.3E-02 OK|
 | vv-RS | 0.85 | 3.4E-04 | 1.1E-02 | 10.9 6.6E-02 OK|
 | ww-RS | 0.98 | 7.8E-04 | 7.9E-02 | 10.9 5.0E-02 OK|
 | uv-RS | 1.20 | 5.7E-04 | 2.0E-02 | 10.9 8.9E-02 OK|
 | uw-RS | 0.78 | 9.4E-04 | 3.2E-02 | 10.9 6.1E-02 OK|
 | vw-RS | 0.94 | 4.3E-04 | 1.3E-02 | 10.9 8.9E-02 OK|
 | E-Diss.K | 1.03 | 7.3E-04 | 8.1E-02 | 12.3 3.2E-03 OK|
 +----------------------+------+---------+---------+------------------+
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 2 CPU SECONDS = 8.35E+05
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.52 | 9.7E-05 | 1.9E-03 | 1.3E-01 ok|
 | V-Mom | 0.48 | 9.6E-05 | 3.0E-03 | 1.0E-01 ok|
 | W-Mom | 0.51 | 9.6E-05 | 1.7E-03 | 1.3E-01 ok|
 | P-Mass | 2.05 | 1.6E-05 | 1.4E-03 | 10.3 4.7E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 1.23 | 1.3E-03 | 4.5E-02 | 10.9 3.2E-02 OK|
 | vv-RS | 0.95 | 3.3E-04 | 1.6E-02 | 10.9 6.7E-02 OK|
 | ww-RS | 1.80 | 1.4E-03 | 1.8E-01 | 10.9 5.4E-02 OK|
 | uv-RS | 0.85 | 4.8E-04 | 1.3E-02 | 10.9 7.9E-02 OK|
 | uw-RS | 0.97 | 9.0E-04 | 2.9E-02 | 10.9 6.1E-02 OK|
 | vw-RS | 1.31 | 5.6E-04 | 2.3E-02 | 10.9 7.9E-02 OK|
 | E-Diss.K | 0.60 | 4.4E-04 | 7.3E-02 | 12.3 5.9E-03 OK|
 +----------------------+------+---------+---------+------------------+
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 3 CPU SECONDS = 8.36E+05
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.58 | 5.6E-05 | 1.4E-03 | 1.8E-01 ok|
 | V-Mom | 0.56 | 5.4E-05 | 1.3E-03 | 1.3E-01 ok|
 | W-Mom | 0.59 | 5.7E-05 | 1.1E-03 | 1.7E-01 ok|
 | P-Mass | 1.00 | 1.6E-05 | 9.6E-04 | 10.3 1.9E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 0.20 | 2.7E-04 | 1.9E-02 | 10.9 9.1E-02 OK|
 | vv-RS | 1.29 | 4.2E-04 | 2.1E-02 | 10.9 7.4E-02 OK|
 | ww-RS | 0.45 | 6.4E-04 | 1.4E-01 | 10.9 7.2E-02 OK|
 | uv-RS | 1.09 | 5.3E-04 | 2.2E-02 | 10.9 9.2E-02 OK|
 | uw-RS | 0.96 | 8.7E-04 | 3.1E-02 | 10.9 7.9E-02 OK|
 | vw-RS | 0.75 | 4.2E-04 | 1.3E-02 | 15.9 4.1E-02 OK|
 | E-Diss.K | 0.63 | 2.8E-04 | 2.6E-02 | 12.3 3.9E-03 OK|
 +----------------------+------+---------+---------+------------------+
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 4 CPU SECONDS = 8.37E+05
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.75 | 4.2E-05 | 9.9E-04 | 1.8E-01 ok|
 | V-Mom | 0.72 | 3.9E-05 | 8.0E-04 | 1.3E-01 ok|
 | W-Mom | 0.75 | 4.3E-05 | 1.4E-03 | 1.6E-01 ok|
 | P-Mass | 0.61 | 9.9E-06 | 8.3E-04 | 10.3 3.0E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 4.89 | 1.3E-03 | 4.9E-02 | 10.9 5.0E-02 OK|
 | vv-RS | 0.84 | 3.6E-04 | 1.7E-02 | 10.9 5.9E-02 OK|
 | ww-RS | 1.93 | 1.2E-03 | 4.1E-02 | 10.9 5.3E-02 OK|
 | uv-RS | 0.85 | 4.5E-04 | 1.2E-02 | 10.9 7.0E-02 OK|
 | uw-RS | 0.60 | 5.2E-04 | 1.6E-02 | 10.9 5.9E-02 OK|
 | vw-RS | 1.28 | 5.4E-04 | 2.3E-02 | 10.9 6.7E-02 OK|
 | E-Diss.K | 1.00 | 2.8E-04 | 4.4E-02 | 12.3 3.8E-03 OK|
 +----------------------+------+---------+---------+------------------+
 ----------------------------------------------------------------------
 COEFFICIENT LOOP ITERATION = 5 CPU SECONDS = 8.37E+05
 ----------------------------------------------------------------------
 |

Equation | Rate | RMS Res | Max Res | Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom | 0.79 | 3.3E-05 | 1.3E-03 | 1.6E-01 ok|
 | V-Mom | 0.74 | 2.9E-05 | 7.9E-04 | 1.2E-01 ok|
 | W-Mom | 0.75 | 3.2E-05 | 9.0E-04 | 1.5E-01 ok|
 | P-Mass | 0.87 | 8.6E-06 | 1.1E-03 | 10.3 4.0E-02 OK|
 +----------------------+------+---------+---------+------------------+
 | uu-RS | 0.26 | 3.5E-04 | 2.1E-02 | 10.9 6.2E-02 OK|
 | vv-RS | 0.96 | 3.4E-04 | 1.7E-02 | 10.9 6.2E-02 OK|
 | ww-RS | 0.22 | 2.7E-04 | 1.4E-02 | 10.9 9.3E-02 OK|
 | uv-RS | 1.15 | 5.2E-04 | 2.3E-02 | 10.9 7.3E-02 OK|
 | uw-RS | 1.91 | 1.0E-03 | 3.3E-02 | 10.9 6.4E-02 OK|
 | vw-RS | 0.65 | 3.5E-04 | 1.1E-02 | 10.9 9.6E-02 OK|
 | E-Diss.K | 0.65 | 1.8E-04 | 1.8E-02 | 12.3 7.4E-03 OK|
 +----------------------+------+---------+---------+------------------+
</BODY>

Well, anyone got a clue about this issue?

Thanks in advance, S. W.

July 1, 2005, 20:49

S.W.

The solver keeps solving coefficient loops until "all" variables have met the convergence criteria. Your convergence criteria is set to 1.0E-5. On the iterations you posted, Mass (P) is makeing it below this target (i.e. 9.xE-6) but none of the other variables are. So, after your prescribed max coefficient loops the solver gives up and moves on to the next time step.

Solution: 1. Use a smaller time step 2. Allow more coefficent loops (10 is typical) 3. Raise your convergence criteria

Solution 1 is your best bet here. Notice the lower case "ok" on U,V,W-momentum. This means that the coefficient loops are barely acceptable. You probably need a smaller time step here to get acceptable coefficient loop behavior, and to get all the variables to the target RMS value.

Jeff

July 2, 2005, 10:28

Hi,

I appologize for being meddling in this topic, but Stevie Wonder's Residual Target RMS is 5E-5 (not 1E-5), and acording to the documentation: "The CFX-Solver will terminate the run when the equation residuals calculated using the method specified are below the Residual Target value. Note that the residual level for turbulence transport equations (for k, epslon, and the Reynolds stress components) does not form part of the convergence criteria."

After 4 coefficient loops, the U, V, W and P equations RMS residuals are below 5E-5, and the turbulence equations do not form part of the convergence criteria.

The cause why the Solver doesn't jump to the next time step after 4 coefficient loops may be, as Jeff noticed, the lower case "ok" on the U, V and W equations.

I would suggest to set the Maximum Number of Coefficient Loops to a high value (50 for example), and start from an intermediate result obtained with Maximum Number of Coefficient Loops = 5. Check if the Solver jumps to the next time step when all the U, V, W and P equations have a capital "OK".

Regards,

Rui

July 4, 2005, 08:29

Hey guys,

Thanks for your awesome inputs. ;-)

My problem is that I was neglecting the lower case "ok" in the hydrodynamic residual equations. I'm considering in reducing my time step size.

I might be wrong but I've heard from someone from CFX that in a single-phase incompressible flow coefficient loops greater than 8 could even be dangerous to your solution. Reducing the time step is best thing applicable in this case.

Cheers, S. W.

July 4, 2005, 19:12

Hi,

I think saying using more than 8 iterations per timestep is "dangerous to your solution" for single phase is going a bit far. Almost always you will find that it is not optimum and that using a smaller timestep and less iterations per timestep is more efficient.

Regards, Glenn

July 5, 2005, 12:31

Hi Glenn,

I think sometime you will need extra few timesteps if your initial solution is not good enough and you're using transient simulation to check if the flow is unsteady in nature.... Let me know if I'm wrong.. Cheers.

July 1, 2005, 12:50	5.7.1 solver doing max coeff loops.	#1
Stevie Wonder Guest Posts: n/a	Hello people, Have you ever seen a case that the residuals (U,V,W,P) converge in the inner coefficent loops but the solver keeps doing the maximum set coeff. loops for every time step in a transient simulation? Details of the ccl is given below: <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">SOLVER CONTROL:</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">ADVECTION SCHEME:</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">Blend Factor = 0.75</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">Option = Specified Blend Factor</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">END</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">CONVERGENCE CONTROL:</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">Maximum Number of Coefficient Loops = 5</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">END</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">CONVERGENCE CRITERIA:</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">Residual Target = 5e-05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">Residual Type = RMS</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">END</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">TRANSIENT SCHEME:</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">Option = Second Order Backward Euler</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">END</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=1 STYLE="font-size: 8pt">END</FONT></FONT> As stated, I have defaults definitions (i.e. no expert parameters) but the solver keeps solving all 5 coeff. loops as can be seen in the output presented. <BODY LANG="en-US" DIR="LTR"> <P STYLE="margin-bottom: 0in"> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">============================================= =========================</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">TIME STEP = 230 SIMULATION TIME = 2.12E-01 CPU SECONDS = 8.31E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 1</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 1.02 \| 1.9E-04 \| 3.7E-03 \| 1.6E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 1.00 \| 2.0E-04 \| 4.0E-03 \| 5.5E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 1.00 \| 1.9E-04 \| 3.7E-03 \| 1.7E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 0.92 \| 1.0E-05 \| 1.1E-03 \| 24.3 5.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 0.67 \| 5.2E-04 \| 3.5E-02 \| 10.9 7.3E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 1.02 \| 4.0E-04 \| 1.4E-02 \| 10.9 6.8E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 0.79 \| 8.0E-04 \| 1.4E-01 \| 5.9 6.8E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 0.91 \| 4.7E-04 \| 1.5E-02 \| 15.8 4.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 1.17 \| 1.2E-03 \| 3.2E-02 \| 10.9 7.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 1.15 \| 4.6E-04 \| 1.6E-02 \| 15.8 4.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 1.49 \| 7.1E-04 \| 6.0E-02 \| 12.3 2.6E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 2 CPU SECONDS = 8.32E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.52 \| 1.0E-04 \| 1.7E-03 \| 1.3E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.48 \| 9.7E-05 \| 3.0E-03 \| 1.0E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.53 \| 1.0E-04 \| 1.8E-03 \| 1.3E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 1.57 \| 1.6E-05 \| 1.3E-03 \| 10.3 4.8E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 3.00 \| 1.6E-03 \| 3.9E-02 \| 10.9 4.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 0.87 \| 3.5E-04 \| 1.0E-02 \| 10.9 8.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 1.67 \| 1.3E-03 \| 1.0E-01 \| 10.9 6.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 1.33 \| 6.2E-04 \| 2.0E-02 \| 10.9 8.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 0.27 \| 3.3E-04 \| 1.9E-02 \| 10.9 8.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 1.22 \| 5.6E-04 \| 1.8E-02 \| 10.9 9.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 0.80 \| 5.7E-04 \| 8.4E-02 \| 12.3 7.3E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 3 CPU SECONDS = 8.32E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.57 \| 5.7E-05 \| 1.2E-03 \| 1.8E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.55 \| 5.4E-05 \| 1.6E-03 \| 1.3E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.57 \| 5.7E-05 \| 1.2E-03 \| 1.8E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 1.13 \| 1.9E-05 \| 1.5E-03 \| 10.3 2.0E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 0.45 \| 7.0E-04 \| 2.7E-02 \| 10.9 4.7E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 1.19 \| 4.2E-04 \| 2.0E-02 \| 10.9 6.5E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 1.08 \| 1.4E-03 \| 3.0E-01 \| 5.9 9.6E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 0.82 \| 5.1E-04 \| 1.7E-02 \| 10.9 9.5E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 3.61 \| 1.2E-03 \| 3.5E-02 \| 10.9 7.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 0.90 \| 5.1E-04 \| 1.8E-02 \| 10.9 8.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 0.42 \| 2.4E-04 \| 3.6E-02 \| 12.3 3.6E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 4 CPU SECONDS = 8.33E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.78 \| 4.4E-05 \| 1.5E-03 \| 1.7E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.73 \| 3.9E-05 \| 1.1E-03 \| 1.3E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.78 \| 4.4E-05 \| 1.2E-03 \| 1.6E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 0.54 \| 1.0E-05 \| 6.1E-04 \| 10.3 3.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 1.35 \| 9.4E-04 \| 2.6E-02 \| 10.9 6.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 0.91 \| 3.8E-04 \| 1.2E-02 \| 10.9 8.0E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 0.85 \| 1.2E-03 \| 2.1E-01 \| 10.9 6.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 1.11 \| 5.7E-04 \| 1.9E-02 \| 10.9 8.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 0.41 \| 4.8E-04 \| 2.0E-02 \| 10.9 7.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 0.94 \| 4.8E-04 \| 1.5E-02 \| 10.9 8.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 1.06 \| 2.6E-04 \| 4.0E-02 \| 12.3 6.2E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 5 CPU SECONDS = 8.34E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.78 \| 3.4E-05 \| 1.2E-03 \| 1.6E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.78 \| 3.1E-05 \| 7.9E-04 \| 1.2E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.82 \| 3.6E-05 \| 1.4E-03 \| 1.6E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 0.95 \| 9.5E-06 \| 1.1E-03 \| 10.3 4.3E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 0.65 \| 6.1E-04 \| 3.2E-02 \| 10.9 6.5E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 0.90 \| 3.4E-04 \| 1.5E-02 \| 10.9 5.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 0.60 \| 7.3E-04 \| 2.3E-02 \| 5.9 9.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 0.65 \| 3.7E-04 \| 1.2E-02 \| 10.9 8.7E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 1.97 \| 9.4E-04 \| 2.6E-02 \| 10.9 5.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 0.93 \| 4.4E-04 \| 1.8E-02 \| 10.9 8.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 0.82 \| 2.1E-04 \| 2.6E-02 \| 12.3 5.9E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">============================================= =========================</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">TIME STEP = 231 SIMULATION TIME = 2.13E-01 CPU SECONDS = 8.34E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 1</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.99 \| 1.9E-04 \| 3.6E-03 \| 1.6E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.99 \| 2.0E-04 \| 4.0E-03 \| 5.4E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.99 \| 1.9E-04 \| 3.6E-03 \| 1.6E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 0.76 \| 8.0E-06 \| 7.9E-04 \| 24.3 5.6E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 2.10 \| 1.1E-03 \| 3.2E-02 \| 10.9 5.3E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 0.85 \| 3.4E-04 \| 1.1E-02 \| 10.9 6.6E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 0.98 \| 7.8E-04 \| 7.9E-02 \| 10.9 5.0E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 1.20 \| 5.7E-04 \| 2.0E-02 \| 10.9 8.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 0.78 \| 9.4E-04 \| 3.2E-02 \| 10.9 6.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 0.94 \| 4.3E-04 \| 1.3E-02 \| 10.9 8.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 1.03 \| 7.3E-04 \| 8.1E-02 \| 12.3 3.2E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 2 CPU SECONDS = 8.35E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.52 \| 9.7E-05 \| 1.9E-03 \| 1.3E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.48 \| 9.6E-05 \| 3.0E-03 \| 1.0E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.51 \| 9.6E-05 \| 1.7E-03 \| 1.3E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 2.05 \| 1.6E-05 \| 1.4E-03 \| 10.3 4.7E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 1.23 \| 1.3E-03 \| 4.5E-02 \| 10.9 3.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 0.95 \| 3.3E-04 \| 1.6E-02 \| 10.9 6.7E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 1.80 \| 1.4E-03 \| 1.8E-01 \| 10.9 5.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 0.85 \| 4.8E-04 \| 1.3E-02 \| 10.9 7.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 0.97 \| 9.0E-04 \| 2.9E-02 \| 10.9 6.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 1.31 \| 5.6E-04 \| 2.3E-02 \| 10.9 7.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 0.60 \| 4.4E-04 \| 7.3E-02 \| 12.3 5.9E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 3 CPU SECONDS = 8.36E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.58 \| 5.6E-05 \| 1.4E-03 \| 1.8E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.56 \| 5.4E-05 \| 1.3E-03 \| 1.3E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.59 \| 5.7E-05 \| 1.1E-03 \| 1.7E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 1.00 \| 1.6E-05 \| 9.6E-04 \| 10.3 1.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 0.20 \| 2.7E-04 \| 1.9E-02 \| 10.9 9.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 1.29 \| 4.2E-04 \| 2.1E-02 \| 10.9 7.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 0.45 \| 6.4E-04 \| 1.4E-01 \| 10.9 7.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 1.09 \| 5.3E-04 \| 2.2E-02 \| 10.9 9.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 0.96 \| 8.7E-04 \| 3.1E-02 \| 10.9 7.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 0.75 \| 4.2E-04 \| 1.3E-02 \| 15.9 4.1E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 0.63 \| 2.8E-04 \| 2.6E-02 \| 12.3 3.9E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 4 CPU SECONDS = 8.37E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.75 \| 4.2E-05 \| 9.9E-04 \| 1.8E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.72 \| 3.9E-05 \| 8.0E-04 \| 1.3E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.75 \| 4.3E-05 \| 1.4E-03 \| 1.6E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 0.61 \| 9.9E-06 \| 8.3E-04 \| 10.3 3.0E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 4.89 \| 1.3E-03 \| 4.9E-02 \| 10.9 5.0E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 0.84 \| 3.6E-04 \| 1.7E-02 \| 10.9 5.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 1.93 \| 1.2E-03 \| 4.1E-02 \| 10.9 5.3E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 0.85 \| 4.5E-04 \| 1.2E-02 \| 10.9 7.0E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 0.60 \| 5.2E-04 \| 1.6E-02 \| 10.9 5.9E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 1.28 \| 5.4E-04 \| 2.3E-02 \| 10.9 6.7E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 1.00 \| 2.8E-04 \| 4.4E-02 \| 12.3 3.8E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">COEFFICIENT LOOP ITERATION = 5 CPU SECONDS = 8.37E+05</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">----------------------------------------------------------------------</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| U-Mom \| 0.79 \| 3.3E-05 \| 1.3E-03 \| 1.6E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| V-Mom \| 0.74 \| 2.9E-05 \| 7.9E-04 \| 1.2E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| W-Mom \| 0.75 \| 3.2E-05 \| 9.0E-04 \| 1.5E-01 ok\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| P-Mass \| 0.87 \| 8.6E-06 \| 1.1E-03 \| 10.3 4.0E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uu-RS \| 0.26 \| 3.5E-04 \| 2.1E-02 \| 10.9 6.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vv-RS \| 0.96 \| 3.4E-04 \| 1.7E-02 \| 10.9 6.2E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| ww-RS \| 0.22 \| 2.7E-04 \| 1.4E-02 \| 10.9 9.3E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uv-RS \| 1.15 \| 5.2E-04 \| 2.3E-02 \| 10.9 7.3E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| uw-RS \| 1.91 \| 1.0E-03 \| 3.3E-02 \| 10.9 6.4E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| vw-RS \| 0.65 \| 3.5E-04 \| 1.1E-02 \| 10.9 9.6E-02 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">\| E-Diss.K \| 0.65 \| 1.8E-04 \| 1.8E-02 \| 12.3 7.4E-03 OK\|</FONT></FONT> <P STYLE="margin-bottom: 0in"> <FONT FACE="Courier, monospace"><FONT SIZE=2 STYLE="font-size: 9pt">+----------------------+------+---------+---------+------------------+</FONT></FONT> </BODY> Well, anyone got a clue about this issue? Thanks in advance, S. W.

July 1, 2005, 20:49	Re: 5.7.1 solver doing max coeff loops.	#2
Jeff Guest Posts: n/a	S.W. The solver keeps solving coefficient loops until "all" variables have met the convergence criteria. Your convergence criteria is set to 1.0E-5. On the iterations you posted, Mass (P) is makeing it below this target (i.e. 9.xE-6) but none of the other variables are. So, after your prescribed max coefficient loops the solver gives up and moves on to the next time step. Solution: 1. Use a smaller time step 2. Allow more coefficent loops (10 is typical) 3. Raise your convergence criteria Solution 1 is your best bet here. Notice the lower case "ok" on U,V,W-momentum. This means that the coefficient loops are barely acceptable. You probably need a smaller time step here to get acceptable coefficient loop behavior, and to get all the variables to the target RMS value. Jeff

July 2, 2005, 10:28	Re: 5.7.1 solver doing max coeff loops.	#3
Rui Guest Posts: n/a	Hi, I appologize for being meddling in this topic, but Stevie Wonder's Residual Target RMS is 5E-5 (not 1E-5), and acording to the documentation: "The CFX-Solver will terminate the run when the equation residuals calculated using the method specified are below the Residual Target value. Note that the residual level for turbulence transport equations (for k, epslon, and the Reynolds stress components) does not form part of the convergence criteria." After 4 coefficient loops, the U, V, W and P equations RMS residuals are below 5E-5, and the turbulence equations do not form part of the convergence criteria. The cause why the Solver doesn't jump to the next time step after 4 coefficient loops may be, as Jeff noticed, the lower case "ok" on the U, V and W equations. I would suggest to set the Maximum Number of Coefficient Loops to a high value (50 for example), and start from an intermediate result obtained with Maximum Number of Coefficient Loops = 5. Check if the Solver jumps to the next time step when all the U, V, W and P equations have a capital "OK". Regards, Rui

July 4, 2005, 08:29	Re: 5.7.1 solver doing max coeff loops.	#4
Stevie Wonder Guest Posts: n/a	Hey guys, Thanks for your awesome inputs. ;-) My problem is that I was neglecting the lower case "ok" in the hydrodynamic residual equations. I'm considering in reducing my time step size. I might be wrong but I've heard from someone from CFX that in a single-phase incompressible flow coefficient loops greater than 8 could even be dangerous to your solution. Reducing the time step is best thing applicable in this case. Cheers, S. W.

July 4, 2005, 19:12	Re: 5.7.1 solver doing max coeff loops.	#5
Glenn Horrocks Guest Posts: n/a	Hi, I think saying using more than 8 iterations per timestep is "dangerous to your solution" for single phase is going a bit far. Almost always you will find that it is not optimum and that using a smaller timestep and less iterations per timestep is more efficient. Regards, Glenn

July 5, 2005, 12:31	Re: 5.7.1 solver doing max coeff loops.	#6
Pete Guest Posts: n/a	Hi Glenn, I think sometime you will need extra few timesteps if your initial solution is not good enough and you're using transient simulation to check if the flow is unsteady in nature.... Let me know if I'm wrong.. Cheers.

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