CFX bounds error

Hemishmistry04 · October 23, 2019, 10:55

Hi,

I am doing transient Simulation with Interpolation of H2, O2, N2 and H20.

Simulation is getting converged, but, during Simulation I am getting following table which shows the Error Red Marked in .out file -bounding box.

Is there anyway to avoid this table?

I have turned on extension of variable upper and lower limit also.

================================================== ====================
| Adaptive Timestepping Information |
----------------------------------------------------------------------
| Direction | Ratio | Last Value | Next Value | RMS Co | Max Co |
+----------------+-------+------------+------------+--------+--------+
| Unchanged | 1.000 | 5.0000E-04 | 5.0000E-04 | 0.41 | 40.12 |
+----------------+-------+------------+------------+--------+--------+
================================================== ====================
TIME STEP = 6 SIMULATION TIME = 7.8500E-03 CPU SECONDS = 5.973E+03
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 1 CPU SECONDS = 5.973E+03
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.81 | 3.6E-04 | 5.7E-02 | 3.0E-04 OK|
| V-Mom | 0.81 | 1.7E-04 | 1.1E-02 | 6.1E-04 OK|
| W-Mom | 0.83 | 1.6E-04 | 1.4E-02 | 6.2E-04 OK|
| P-Mass | 0.97 | 4.1E-05 | 3.4E-03 | 4.8 8.8E-04 OK|
+----------------------+------+---------+---------+------------------+
| H-Energy | 0.76 | 3.4E-04 | 3.2E-02 | 7.6E-06 OK|
| T-Energy | 1.00 | 2.9E-09 | 9.9E-08 | 5.6 7.6E-06 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 0.55 | 8.8E-05 | 1.8E-02 | 5.5 2.3E-05 OK|
| O-TurbFreq | 0.16 | 1.6E-05 | 5.5E-03 | 10.8 2.0E-08 OK|
+----------------------+------+---------+---------+------------------+
| H2-Mass Fraction | 0.00 | 0.0E+00 | 0.0E+00 | 5.5 0.0E+00 OK|
| H2O-Mass Fraction | 0.76 | 3.5E-04 | 3.3E-02 | 5.5 6.2E-06 OK|
| O2-Mass Fraction | 0.76 | 3.5E-04 | 3.3E-02 | 5.5 6.2E-06 OK|
+----------------------+------+---------+---------+------------------+
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 2 CPU SECONDS = 6.079E+03
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.48 | 1.7E-04 | 2.5E-02 | 5.8E-04 OK|
| V-Mom | 0.11 | 1.8E-05 | 1.7E-03 | 2.1E-03 OK|
| W-Mom | 0.11 | 1.8E-05 | 1.9E-03 | 2.2E-03 OK|
| P-Mass | 0.69 | 2.9E-05 | 6.4E-03 | 4.8 5.7E-04 OK|
+----------------------+------+---------+---------+------------------+
| H-Energy | 0.17 | 5.7E-05 | 7.9E-03 | 1.3E-05 OK|
| T-Energy | 1.00 | 2.9E-09 | 9.8E-08 | 5.6 1.3E-05 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 2.15 | 1.9E-04 | 3.0E-02 | 5.5 2.1E-05 OK|
| O-TurbFreq | 3.50 | 5.7E-05 | 1.7E-02 | 10.8 2.5E-08 OK|
+----------------------+------+---------+---------+------------------+
| H2-Mass Fraction | 0.00 | 0.0E+00 | 0.0E+00 | 5.5 0.0E+00 OK|
| H2O-Mass Fraction | 0.16 | 5.7E-05 | 8.0E-03 | 5.5 1.2E-05 OK|
| O2-Mass Fraction | 0.16 | 5.7E-05 | 8.0E-03 | 5.5 1.2E-05 OK|
+----------------------+------+---------+---------+------------------+
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 3 CPU SECONDS = 6.184E+03
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.32 | 5.6E-05 | 4.3E-03 | 7.7E-04 OK|
| V-Mom | 0.72 | 1.3E-05 | 1.8E-03 | 2.4E-03 OK|
| W-Mom | 0.65 | 1.2E-05 | 1.3E-03 | 2.3E-03 OK|
| P-Mass | 0.70 | 2.0E-05 | 2.1E-03 | 4.8 7.5E-04 OK|
+----------------------+------+---------+---------+------------------+
| H-Energy | 0.63 | 3.6E-05 | 3.1E-03 | 7.6E-05 OK|
| T-Energy | 1.00 | 2.9E-09 | 9.8E-08 | 5.6 7.6E-05 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 0.28 | 5.3E-05 | 1.2E-02 | 5.5 3.2E-06 OK|
| O-TurbFreq | 0.53 | 3.0E-05 | 9.2E-03 | 10.8 3.2E-08 OK|
+----------------------+------+---------+---------+------------------+
| H2-Mass Fraction | 0.00 | 0.0E+00 | 0.0E+00 | 5.5 0.0E+00 OK|
| H2O-Mass Fraction | 0.63 | 3.5E-05 | 3.1E-03 | 5.5 6.6E-05 OK|
| O2-Mass Fraction | 0.63 | 3.5E-05 | 3.1E-03 | 5.5 6.6E-05 OK|
+----------------------+------+---------+---------+------------------+
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 4 CPU SECONDS = 6.290E+03
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.62 | 3.5E-05 | 5.4E-03 | 2.1E-03 OK|
| V-Mom | 0.71 | 9.4E-06 | 1.7E-03 | 7.1E-03 OK|
| W-Mom | 0.66 | 7.7E-06 | 1.2E-03 | 7.1E-03 OK|
| P-Mass | 0.65 | 1.3E-05 | 1.2E-03 | 4.8 1.4E-03 OK|
+----------------------+------+---------+---------+------------------+
| H-Energy | 0.38 | 1.4E-05 | 1.2E-03 | 8.1E-05 OK|
| T-Energy | 1.00 | 2.9E-09 | 9.8E-08 | 5.6 8.1E-05 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 0.71 | 3.8E-05 | 8.4E-03 | 5.5 1.3E-05 OK|
| O-TurbFreq | 0.74 | 2.3E-05 | 9.4E-03 | 10.8 1.6E-08 OK|
+----------------------+------+---------+---------+------------------+
| H2-Mass Fraction | 0.00 | 0.0E+00 | 0.0E+00 | 5.5 0.0E+00 OK|
| H2O-Mass Fraction | 0.36 | 1.3E-05 | 1.2E-03 | 5.5 7.1E-05 OK|
| O2-Mass Fraction | 0.36 | 1.3E-05 | 1.2E-03 | 5.5 7.1E-05 OK|
+----------------------+------+---------+---------+------------------+
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 5 CPU SECONDS = 6.398E+03
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.55 | 1.9E-05 | 2.6E-03 | 2.4E-03 OK|
| V-Mom | 0.59 | 5.5E-06 | 1.1E-03 | 6.8E-03 OK|
| W-Mom | 0.63 | 4.8E-06 | 8.7E-04 | 6.9E-03 OK|
| P-Mass | 0.51 | 6.6E-06 | 7.9E-04 | 4.8 1.6E-03 OK|
+----------------------+------+---------+---------+------------------+
| H-Energy | 0.63 | 8.6E-06 | 1.1E-03 | 9.5E-05 OK|
| T-Energy | 1.00 | 2.9E-09 | 9.8E-08 | 5.6 9.5E-05 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 0.83 | 3.1E-05 | 5.1E-03 | 5.5 1.7E-05 OK|
| O-TurbFreq | 0.61 | 1.4E-05 | 4.6E-03 | 10.8 1.3E-08 OK|
+----------------------+------+---------+---------+------------------+
| H2-Mass Fraction | 0.00 | 0.0E+00 | 0.0E+00 | 5.5 0.0E+00 OK|
| H2O-Mass Fraction | 0.60 | 7.8E-06 | 8.0E-04 | 5.5 7.0E-05 OK|
| O2-Mass Fraction | 0.60 | 7.8E-06 | 8.0E-04 | 5.5 7.0E-05 OK|
+----------------------+------+---------+---------+------------------+
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 6 CPU SECONDS = 6.503E+03
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.71 | 1.4E-05 | 2.9E-03 | 1.9E-03 OK|
| V-Mom | 0.69 | 3.8E-06 | 7.1E-04 | 4.6E-03 OK|
| W-Mom | 0.69 | 3.3E-06 | 6.7E-04 | 4.7E-03 OK|
| P-Mass | 0.62 | 4.1E-06 | 5.6E-04 | 4.8 1.5E-03 OK|
+----------------------+------+---------+---------+------------------+
| H-Energy | 0.80 | 6.9E-06 | 7.4E-04 | 1.2E-04 OK|
| T-Energy | 1.00 | 2.9E-09 | 9.8E-08 | 5.6 1.2E-04 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 0.67 | 2.1E-05 | 3.7E-03 | 5.5 1.2E-05 OK|
| O-TurbFreq | 0.93 | 1.3E-05 | 5.3E-03 | 10.8 1.7E-08 OK|
+----------------------+------+---------+---------+------------------+
| H2-Mass Fraction | 0.00 | 0.0E+00 | 0.0E+00 | 5.5 0.0E+00 OK|
| H2O-Mass Fraction | 0.81 | 6.3E-06 | 6.9E-04 | 5.5 9.4E-05 OK|
| O2-Mass Fraction | 0.81 | 6.3E-06 | 6.9E-04 | 5.5 9.1E-05 OK|
+----------------------+------+---------+---------+------------------+
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 7 CPU SECONDS = 6.608E+03
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.73 | 9.9E-06 | 1.9E-03 | 1.0E-03 OK|
| V-Mom | 0.77 | 2.9E-06 | 5.0E-04 | 4.1E-03 OK|
| W-Mom | 0.74 | 2.5E-06 | 4.2E-04 | 4.1E-03 OK|
| P-Mass | 0.66 | 2.7E-06 | 4.3E-04 | 4.8 1.7E-03 OK|
+----------------------+------+---------+---------+------------------+
| H-Energy | 0.74 | 5.1E-06 | 5.9E-04 | 2.0E-04 OK|
| T-Energy | 1.00 | 2.9E-09 | 9.8E-08 | 5.6 2.0E-04 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 0.78 | 1.6E-05 | 3.0E-03 | 5.5 1.2E-05 OK|
| O-TurbFreq | 0.74 | 9.5E-06 | 3.5E-03 | 10.8 2.7E-08 OK|
+----------------------+------+---------+---------+------------------+
| H2-Mass Fraction | 0.00 | 0.0E+00 | 0.0E+00 | 5.5 0.0E+00 OK|
| H2O-Mass Fraction | 0.74 | 4.7E-06 | 4.3E-04 | 5.5 1.4E-04 OK|
| O2-Mass Fraction | 0.74 | 4.7E-06 | 4.3E-04 | 5.5 1.3E-04 OK|
+----------------------+------+---------+---------+------------------+
+--------------------------------------------------------------------+
| Table bounds warnings at: END OF TIME STEP |
+--------------------------------------------------------------------+
+--------------------------------------------------------------------+
| |
| Independent variables went out of bounds while computing the |
| variables listed below using table interpolation. In each case |
| the bounds error was handled by clipping or extrapolation. |
| If this situation persists, consider increasing the table range. |
| |
+--------------------------------------------------------------------+
| |
| Location Name : Atmosphaere |
| Mesh location : IELG39/VERTEX |
| Routine : MASSOU_CALPROP |
| Partition : 1 |
| Variable Name : O2.Static Enthalpy |
| Ind. Variable : Temperature |
| Bound : Lower |
| Min Value : 0.0000E+00 |
| Handled By : Extrapolation |
| |
+--------------------------------------------------------------------+
| |
| Location Name : Atmosphaere |
| Mesh location : IELG39/VERTEX |
| Routine : MASSOU_CALPROP |
| Partition : 1 |
| Variable Name : H2.Static Enthalpy |
| Ind. Variable : Temperature |
| Bound : Lower |
| Min Value : 0.0000E+00 |
| Handled By : Extrapolation |
| |
+--------------------------------------------------------------------+
| |
| Location Name : Atmosphaere |
| Mesh location : IELG39/VERTEX |
| Routine : MASSOU_CALPROP |
| Partition : 1 |
| Variable Name : N2.Static Enthalpy |
| Ind. Variable : Temperature |
| Bound : Lower |
| Min Value : 0.0000E+00 |
| Handled By : Extrapolation |
| |
+--------------------------------------------------------------------+
+--------------------------------------------------------------------+
| Notice: The maximum Mach number is 3.325E+00. |
+--------------------------------------------------------------------+

Any suggestion will be helpful.

Opaque · October 23, 2019, 11:28

Not sure what you mean by removing the error messages. I will assume you meant how to make the solution robust, such as there are no errors of any kind.

You may have to describe what you are modeling in more detail. So far from the error message, and the output provided you are:

Modeling a multicomponent flow
Modeling some kind of mass source into the model
Solving for heat transfer, and the conversion of properties seem to be getting out of bounds

What model are you using for the individual materials in the mixture? How are the table generation limits being set?

Once the temperature conversion starts going towards 0, it means you have a large sink (perhaps due convergence issues) in the system and the system is cooling down toooo fast.

Hemishmistry04 · October 23, 2019, 12:04

Yes, in normal case those H2.Static Enthalpy, N2 and O2 should not coming during Simulation. I have already given wide range of dynamic viscosity, thermal conductivity and specific heat capasity with function of temperature (ranging: -25 to 2000 [°C] ).

This is a case of steam condensation in atmospheric Domain.
Pipe is inlet with 200 [kg/s] at temp. 120 [°C].
Atmospehric Domain contains H2,N2 and O2 --> mass fraction with initialisation with 1 [bar] and 30 [°C]
Heat Transfer case with wall temperature of 30 [°C].
SST model with 5% Turbulence intensity

Even in material defination the temp. & pressure Extrapolation are active, Table Generation with min and max temperature are also active.

Hemishmistry04 · October 25, 2019, 06:35

Finally, I found solution.

The atmosphere Domain has been generated with two part-
1) Atmosphere Default
2) Atmosphere Comb

In the second Domain, the source term has been set default with 0 [K] initialization, so these tables were generated; Problem has been solved with setting to intial boundary condition with 30 [°C].

Thank you for support "Opaque",
Hemish Mistry

October 23, 2019, 10:55	CFX bounds error	#1
Hemishmistry04 New Member ANNONYMOUS Join Date: Jul 2018 Location: Germany Posts: 4 Rep Power: 7	Hi, I am doing transient Simulation with Interpolation of H2, O2, N2 and H20. Simulation is getting converged, but, during Simulation I am getting following table which shows the Error Red Marked in .out file -bounding box. Is there anyway to avoid this table? I have turned on extension of variable upper and lower limit also. ================================================== ==================== \| Adaptive Timestepping Information \| ---------------------------------------------------------------------- \| Direction \| Ratio \| Last Value \| Next Value \| RMS Co \| Max Co \| +----------------+-------+------------+------------+--------+--------+ \| Unchanged \| 1.000 \| 5.0000E-04 \| 5.0000E-04 \| 0.41 \| 40.12 \| +----------------+-------+------------+------------+--------+--------+ ================================================== ==================== TIME STEP = 6 SIMULATION TIME = 7.8500E-03 CPU SECONDS = 5.973E+03 ---------------------------------------------------------------------- COEFFICIENT LOOP ITERATION = 1 CPU SECONDS = 5.973E+03 ---------------------------------------------------------------------- \| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \| +----------------------+------+---------+---------+------------------+ \| U-Mom \| 0.81 \| 3.6E-04 \| 5.7E-02 \| 3.0E-04 OK\| \| V-Mom \| 0.81 \| 1.7E-04 \| 1.1E-02 \| 6.1E-04 OK\| \| W-Mom \| 0.83 \| 1.6E-04 \| 1.4E-02 \| 6.2E-04 OK\| \| P-Mass \| 0.97 \| 4.1E-05 \| 3.4E-03 \| 4.8 8.8E-04 OK\| +----------------------+------+---------+---------+------------------+ \| H-Energy \| 0.76 \| 3.4E-04 \| 3.2E-02 \| 7.6E-06 OK\| \| T-Energy \| 1.00 \| 2.9E-09 \| 9.9E-08 \| 5.6 7.6E-06 OK\| +----------------------+------+---------+---------+------------------+ \| K-TurbKE \| 0.55 \| 8.8E-05 \| 1.8E-02 \| 5.5 2.3E-05 OK\| \| O-TurbFreq \| 0.16 \| 1.6E-05 \| 5.5E-03 \| 10.8 2.0E-08 OK\| +----------------------+------+---------+---------+------------------+ \| H2-Mass Fraction \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 5.5 0.0E+00 OK\| \| H2O-Mass Fraction \| 0.76 \| 3.5E-04 \| 3.3E-02 \| 5.5 6.2E-06 OK\| \| O2-Mass Fraction \| 0.76 \| 3.5E-04 \| 3.3E-02 \| 5.5 6.2E-06 OK\| +----------------------+------+---------+---------+------------------+ ---------------------------------------------------------------------- COEFFICIENT LOOP ITERATION = 2 CPU SECONDS = 6.079E+03 ---------------------------------------------------------------------- \| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \| +----------------------+------+---------+---------+------------------+ \| U-Mom \| 0.48 \| 1.7E-04 \| 2.5E-02 \| 5.8E-04 OK\| \| V-Mom \| 0.11 \| 1.8E-05 \| 1.7E-03 \| 2.1E-03 OK\| \| W-Mom \| 0.11 \| 1.8E-05 \| 1.9E-03 \| 2.2E-03 OK\| \| P-Mass \| 0.69 \| 2.9E-05 \| 6.4E-03 \| 4.8 5.7E-04 OK\| +----------------------+------+---------+---------+------------------+ \| H-Energy \| 0.17 \| 5.7E-05 \| 7.9E-03 \| 1.3E-05 OK\| \| T-Energy \| 1.00 \| 2.9E-09 \| 9.8E-08 \| 5.6 1.3E-05 OK\| +----------------------+------+---------+---------+------------------+ \| K-TurbKE \| 2.15 \| 1.9E-04 \| 3.0E-02 \| 5.5 2.1E-05 OK\| \| O-TurbFreq \| 3.50 \| 5.7E-05 \| 1.7E-02 \| 10.8 2.5E-08 OK\| +----------------------+------+---------+---------+------------------+ \| H2-Mass Fraction \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 5.5 0.0E+00 OK\| \| H2O-Mass Fraction \| 0.16 \| 5.7E-05 \| 8.0E-03 \| 5.5 1.2E-05 OK\| \| O2-Mass Fraction \| 0.16 \| 5.7E-05 \| 8.0E-03 \| 5.5 1.2E-05 OK\| +----------------------+------+---------+---------+------------------+ ---------------------------------------------------------------------- COEFFICIENT LOOP ITERATION = 3 CPU SECONDS = 6.184E+03 ---------------------------------------------------------------------- \| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \| +----------------------+------+---------+---------+------------------+ \| U-Mom \| 0.32 \| 5.6E-05 \| 4.3E-03 \| 7.7E-04 OK\| \| V-Mom \| 0.72 \| 1.3E-05 \| 1.8E-03 \| 2.4E-03 OK\| \| W-Mom \| 0.65 \| 1.2E-05 \| 1.3E-03 \| 2.3E-03 OK\| \| P-Mass \| 0.70 \| 2.0E-05 \| 2.1E-03 \| 4.8 7.5E-04 OK\| +----------------------+------+---------+---------+------------------+ \| H-Energy \| 0.63 \| 3.6E-05 \| 3.1E-03 \| 7.6E-05 OK\| \| T-Energy \| 1.00 \| 2.9E-09 \| 9.8E-08 \| 5.6 7.6E-05 OK\| +----------------------+------+---------+---------+------------------+ \| K-TurbKE \| 0.28 \| 5.3E-05 \| 1.2E-02 \| 5.5 3.2E-06 OK\| \| O-TurbFreq \| 0.53 \| 3.0E-05 \| 9.2E-03 \| 10.8 3.2E-08 OK\| +----------------------+------+---------+---------+------------------+ \| H2-Mass Fraction \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 5.5 0.0E+00 OK\| \| H2O-Mass Fraction \| 0.63 \| 3.5E-05 \| 3.1E-03 \| 5.5 6.6E-05 OK\| \| O2-Mass Fraction \| 0.63 \| 3.5E-05 \| 3.1E-03 \| 5.5 6.6E-05 OK\| +----------------------+------+---------+---------+------------------+ ---------------------------------------------------------------------- COEFFICIENT LOOP ITERATION = 4 CPU SECONDS = 6.290E+03 ---------------------------------------------------------------------- \| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \| +----------------------+------+---------+---------+------------------+ \| U-Mom \| 0.62 \| 3.5E-05 \| 5.4E-03 \| 2.1E-03 OK\| \| V-Mom \| 0.71 \| 9.4E-06 \| 1.7E-03 \| 7.1E-03 OK\| \| W-Mom \| 0.66 \| 7.7E-06 \| 1.2E-03 \| 7.1E-03 OK\| \| P-Mass \| 0.65 \| 1.3E-05 \| 1.2E-03 \| 4.8 1.4E-03 OK\| +----------------------+------+---------+---------+------------------+ \| H-Energy \| 0.38 \| 1.4E-05 \| 1.2E-03 \| 8.1E-05 OK\| \| T-Energy \| 1.00 \| 2.9E-09 \| 9.8E-08 \| 5.6 8.1E-05 OK\| +----------------------+------+---------+---------+------------------+ \| K-TurbKE \| 0.71 \| 3.8E-05 \| 8.4E-03 \| 5.5 1.3E-05 OK\| \| O-TurbFreq \| 0.74 \| 2.3E-05 \| 9.4E-03 \| 10.8 1.6E-08 OK\| +----------------------+------+---------+---------+------------------+ \| H2-Mass Fraction \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 5.5 0.0E+00 OK\| \| H2O-Mass Fraction \| 0.36 \| 1.3E-05 \| 1.2E-03 \| 5.5 7.1E-05 OK\| \| O2-Mass Fraction \| 0.36 \| 1.3E-05 \| 1.2E-03 \| 5.5 7.1E-05 OK\| +----------------------+------+---------+---------+------------------+ ---------------------------------------------------------------------- COEFFICIENT LOOP ITERATION = 5 CPU SECONDS = 6.398E+03 ---------------------------------------------------------------------- \| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \| +----------------------+------+---------+---------+------------------+ \| U-Mom \| 0.55 \| 1.9E-05 \| 2.6E-03 \| 2.4E-03 OK\| \| V-Mom \| 0.59 \| 5.5E-06 \| 1.1E-03 \| 6.8E-03 OK\| \| W-Mom \| 0.63 \| 4.8E-06 \| 8.7E-04 \| 6.9E-03 OK\| \| P-Mass \| 0.51 \| 6.6E-06 \| 7.9E-04 \| 4.8 1.6E-03 OK\| +----------------------+------+---------+---------+------------------+ \| H-Energy \| 0.63 \| 8.6E-06 \| 1.1E-03 \| 9.5E-05 OK\| \| T-Energy \| 1.00 \| 2.9E-09 \| 9.8E-08 \| 5.6 9.5E-05 OK\| +----------------------+------+---------+---------+------------------+ \| K-TurbKE \| 0.83 \| 3.1E-05 \| 5.1E-03 \| 5.5 1.7E-05 OK\| \| O-TurbFreq \| 0.61 \| 1.4E-05 \| 4.6E-03 \| 10.8 1.3E-08 OK\| +----------------------+------+---------+---------+------------------+ \| H2-Mass Fraction \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 5.5 0.0E+00 OK\| \| H2O-Mass Fraction \| 0.60 \| 7.8E-06 \| 8.0E-04 \| 5.5 7.0E-05 OK\| \| O2-Mass Fraction \| 0.60 \| 7.8E-06 \| 8.0E-04 \| 5.5 7.0E-05 OK\| +----------------------+------+---------+---------+------------------+ ---------------------------------------------------------------------- COEFFICIENT LOOP ITERATION = 6 CPU SECONDS = 6.503E+03 ---------------------------------------------------------------------- \| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \| +----------------------+------+---------+---------+------------------+ \| U-Mom \| 0.71 \| 1.4E-05 \| 2.9E-03 \| 1.9E-03 OK\| \| V-Mom \| 0.69 \| 3.8E-06 \| 7.1E-04 \| 4.6E-03 OK\| \| W-Mom \| 0.69 \| 3.3E-06 \| 6.7E-04 \| 4.7E-03 OK\| \| P-Mass \| 0.62 \| 4.1E-06 \| 5.6E-04 \| 4.8 1.5E-03 OK\| +----------------------+------+---------+---------+------------------+ \| H-Energy \| 0.80 \| 6.9E-06 \| 7.4E-04 \| 1.2E-04 OK\| \| T-Energy \| 1.00 \| 2.9E-09 \| 9.8E-08 \| 5.6 1.2E-04 OK\| +----------------------+------+---------+---------+------------------+ \| K-TurbKE \| 0.67 \| 2.1E-05 \| 3.7E-03 \| 5.5 1.2E-05 OK\| \| O-TurbFreq \| 0.93 \| 1.3E-05 \| 5.3E-03 \| 10.8 1.7E-08 OK\| +----------------------+------+---------+---------+------------------+ \| H2-Mass Fraction \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 5.5 0.0E+00 OK\| \| H2O-Mass Fraction \| 0.81 \| 6.3E-06 \| 6.9E-04 \| 5.5 9.4E-05 OK\| \| O2-Mass Fraction \| 0.81 \| 6.3E-06 \| 6.9E-04 \| 5.5 9.1E-05 OK\| +----------------------+------+---------+---------+------------------+ ---------------------------------------------------------------------- COEFFICIENT LOOP ITERATION = 7 CPU SECONDS = 6.608E+03 ---------------------------------------------------------------------- \| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \| +----------------------+------+---------+---------+------------------+ \| U-Mom \| 0.73 \| 9.9E-06 \| 1.9E-03 \| 1.0E-03 OK\| \| V-Mom \| 0.77 \| 2.9E-06 \| 5.0E-04 \| 4.1E-03 OK\| \| W-Mom \| 0.74 \| 2.5E-06 \| 4.2E-04 \| 4.1E-03 OK\| \| P-Mass \| 0.66 \| 2.7E-06 \| 4.3E-04 \| 4.8 1.7E-03 OK\| +----------------------+------+---------+---------+------------------+ \| H-Energy \| 0.74 \| 5.1E-06 \| 5.9E-04 \| 2.0E-04 OK\| \| T-Energy \| 1.00 \| 2.9E-09 \| 9.8E-08 \| 5.6 2.0E-04 OK\| +----------------------+------+---------+---------+------------------+ \| K-TurbKE \| 0.78 \| 1.6E-05 \| 3.0E-03 \| 5.5 1.2E-05 OK\| \| O-TurbFreq \| 0.74 \| 9.5E-06 \| 3.5E-03 \| 10.8 2.7E-08 OK\| +----------------------+------+---------+---------+------------------+ \| H2-Mass Fraction \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 5.5 0.0E+00 OK\| \| H2O-Mass Fraction \| 0.74 \| 4.7E-06 \| 4.3E-04 \| 5.5 1.4E-04 OK\| \| O2-Mass Fraction \| 0.74 \| 4.7E-06 \| 4.3E-04 \| 5.5 1.3E-04 OK\| +----------------------+------+---------+---------+------------------+ +--------------------------------------------------------------------+ \| Table bounds warnings at: END OF TIME STEP \| +--------------------------------------------------------------------+ +--------------------------------------------------------------------+ \| \| \| Independent variables went out of bounds while computing the \| \| variables listed below using table interpolation. In each case \| \| the bounds error was handled by clipping or extrapolation. \| \| If this situation persists, consider increasing the table range. \| \| \| +--------------------------------------------------------------------+ \| \| \| Location Name : Atmosphaere \| \| Mesh location : IELG39/VERTEX \| \| Routine : MASSOU_CALPROP \| \| Partition : 1 \| \| Variable Name : O2.Static Enthalpy \| \| Ind. Variable : Temperature \| \| Bound : Lower \| \| Min Value : 0.0000E+00 \| \| Handled By : Extrapolation \| \| \| +--------------------------------------------------------------------+ \| \| \| Location Name : Atmosphaere \| \| Mesh location : IELG39/VERTEX \| \| Routine : MASSOU_CALPROP \| \| Partition : 1 \| \| Variable Name : H2.Static Enthalpy \| \| Ind. Variable : Temperature \| \| Bound : Lower \| \| Min Value : 0.0000E+00 \| \| Handled By : Extrapolation \| \| \| +--------------------------------------------------------------------+ \| \| \| Location Name : Atmosphaere \| \| Mesh location : IELG39/VERTEX \| \| Routine : MASSOU_CALPROP \| \| Partition : 1 \| \| Variable Name : N2.Static Enthalpy \| \| Ind. Variable : Temperature \| \| Bound : Lower \| \| Min Value : 0.0000E+00 \| \| Handled By : Extrapolation \| \| \| +--------------------------------------------------------------------+ +--------------------------------------------------------------------+ \| Notice: The maximum Mach number is 3.325E+00. \| +--------------------------------------------------------------------+ Any suggestion will be helpful.

October 23, 2019, 11:28		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,804 Rep Power: 32	Not sure what you mean by removing the error messages. I will assume you meant how to make the solution robust, such as there are no errors of any kind. You may have to describe what you are modeling in more detail. So far from the error message, and the output provided you are: Modeling a multicomponent flow Modeling some kind of mass source into the model Solving for heat transfer, and the conversion of properties seem to be getting out of bounds What model are you using for the individual materials in the mixture? How are the table generation limits being set? Once the temperature conversion starts going towards 0, it means you have a large sink (perhaps due convergence issues) in the system and the system is cooling down toooo fast.

October 23, 2019, 12:04		#3
Hemishmistry04 New Member ANNONYMOUS Join Date: Jul 2018 Location: Germany Posts: 4 Rep Power: 7	Yes, in normal case those H2.Static Enthalpy, N2 and O2 should not coming during Simulation. I have already given wide range of dynamic viscosity, thermal conductivity and specific heat capasity with function of temperature (ranging: -25 to 2000 [°C] ). This is a case of steam condensation in atmospheric Domain. Pipe is inlet with 200 [kg/s] at temp. 120 [°C]. Atmospehric Domain contains H2,N2 and O2 --> mass fraction with initialisation with 1 [bar] and 30 [°C] Heat Transfer case with wall temperature of 30 [°C]. SST model with 5% Turbulence intensity Even in material defination the temp. & pressure Extrapolation are active, Table Generation with min and max temperature are also active.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[swak4Foam] GroovyBC the dynamic cousin of funkySetFields that lives on the suburb of the mesh	gschaider	OpenFOAM Community Contributions	300	October 29, 2014 18:00
Undeclared Identifier Errof UDF	SteveGoat	Fluent UDF and Scheme Programming	7	October 15, 2014 07:11
Errors in UDF	shashank312	Fluent UDF and Scheme Programming	6	May 30, 2013 20:30
How to install CGNS under windows xp?	lzgwhy	Main CFD Forum	1	January 11, 2011 18:44
Compiling problems with hello worldC	fw407	OpenFOAM Installation	21	January 6, 2008 17:38

October 25, 2019, 06:35		#4
Hemishmistry04 New Member ANNONYMOUS Join Date: Jul 2018 Location: Germany Posts: 4 Rep Power: 7	Finally, I found solution. The atmosphere Domain has been generated with two part- 1) Atmosphere Default 2) Atmosphere Comb In the second Domain, the source term has been set default with 0 [K] initialization, so these tables were generated; Problem has been solved with setting to intial boundary condition with 30 [°C]. Thank you for support "Opaque", Hemish Mistry