density equation faild

happy · June 17, 2011, 08:16

hi all,,,
the first iteration give me false, and then give me ok, so is that big deal..means does that affect the results?

The mass density model has failed

TIME STEP = 1 SIMULATION TIME = 1.0000E+00 CPU SECONDS = 6.536E+00
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 1 CPU SECONDS = 6.552E+00
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| V-Mom | 0.00 | 1.3E+00 | 1.4E+00 | 2.9E-04 OK|
| W-Mom | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| P-Mass | 0.00 | 3.5E-07 | 3.4E-06 | 41.8 1.0E+02 F |
+----------------------+------+---------+---------+------------------+
| H-Energy | 0.00 | 3.6E-03 | 7.0E-01 | 5.2 3.6E-06 OK|
+----------------------+------+---------+---------+------------------+

any idea to avoid this error

ghorrocks · June 17, 2011, 08:46

Sounds like you have not initialised pressure, density or temperature properly.

What are you modelling?

June 17, 2011, 08:16	density equation faild	#1
happy Senior Member Safia Join Date: Oct 2010 Location: Australia Posts: 161 Rep Power: 15	hi all,,, the first iteration give me false, and then give me ok, so is that big deal..means does that affect the results? The mass density model has failed TIME STEP = 1 SIMULATION TIME = 1.0000E+00 CPU SECONDS = 6.536E+00 ---------------------------------------------------------------------- COEFFICIENT LOOP ITERATION = 1 CPU SECONDS = 6.552E+00 ---------------------------------------------------------------------- \| Equation \| Rate \| RMS Res \| Max Res \| Linear Solution \| +----------------------+------+---------+---------+------------------+ \| U-Mom \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 0.0E+00 OK\| \| V-Mom \| 0.00 \| 1.3E+00 \| 1.4E+00 \| 2.9E-04 OK\| \| W-Mom \| 0.00 \| 0.0E+00 \| 0.0E+00 \| 0.0E+00 OK\| \| P-Mass \| 0.00 \| 3.5E-07 \| 3.4E-06 \| 41.8 1.0E+02 F \| +----------------------+------+---------+---------+------------------+ \| H-Energy \| 0.00 \| 3.6E-03 \| 7.0E-01 \| 5.2 3.6E-06 OK\| +----------------------+------+---------+---------+------------------+ any idea to avoid this error

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June 17, 2011, 08:46		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Sounds like you have not initialised pressure, density or temperature properly. What are you modelling?