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February 14, 2022, 03:01
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Divergence in UDF for density case
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#1 |
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Member
Sai Krishna
Join Date: May 2018
Posts: 37
Rep Power: 8  |
Hi All,
I have to simulate high pressure liquid flow with custom density equation. For this I am trying to validate my UDF approach. I considered ideal gas equation in a UDF and trying to compare the results with available ideal gas method in Fluent. Though UDF is not showing any error in interpretation, but simulation is diverging in no time. Changing the courant number and under relaxation factors just postponed the divergence. I am attaching UDF and residuals pics of the same. Can anyone let me know what can be the issue in this? Note: Actual eqn is the one which I need to incorporate finally Thanks and regards. |
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February 15, 2022, 02:53
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#2 |
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Senior Member
Alexander
Join Date: Apr 2013
Posts: 2,363
Rep Power: 34 |
check mesh quality
__________________
best regards ****************************** press LIKE if this message was helpful |
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February 15, 2022, 04:06
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#3 | |
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Member
Sai Krishna
Join Date: May 2018
Posts: 37
Rep Power: 8 |
Quote:
I have already simulated ideal gas model on the same mesh and it ran smoothly. Problem arising when Iam considering UDF. |
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