July 2, 2022 at 1:13 amkuuku.botchwaySubscriber
Hi everyone, I'm currently running a multiphase VOF problem with three phases, implicit formulation for volume fraction parameter, implicit body force activated, a polynomial function for the surface tension coefficient for each of the phase pairs with surface tension modeling turned on. For the flow a k-epsilon viscous model is used with enhanced wall treatment, thermal effects and curvature correction activated. For one of the fluids I have a polynomial function with temperature as the variable. I've been running into an issue where I'm receiving a floating point exception around when the fluid gets converted into the other fluid T=
This is the console message I received before the floating point exception. Any assistance would be very helpful
July 4, 2022 at 7:09 amDrAmineAnsys Employee
Okay: first start simple and use a plain SST turbulence model (without any additional sub-models). Use a constant surface tension and try again. You need to find out the reason for this behavior: it actually starts diverging at the beginning of the time step.
Can you describe bit more the problem you are trying to model?
July 7, 2022 at 2:20 amkuuku.botchwaySubscriber
Hi, soo after further troubleshooting it seens ti be a problem with Enhanced Wall Treatment in the K-Epsilon model. Would you have any insight as to why that is?
July 5, 2022 at 7:43 pmkuuku.botchwaySubscriber
Hi, Thanks for the reply. Soo I've attempted to run the simulation with a constant surface tension previously and received the same error. I recently just attempted the k-epsilon model without any additional options (no enhanced wall treamtmant and thermal effect) and a constance surface tension now the issue seems to have gone away, but I'm not getting the results I needed. I'm currently testing if the material I'm using is causing the issue
July 8, 2022 at 11:49 ampv00170Subscriber
I got the same problem "floating point" and it was due to inflation.
When I removed inflation, no floating point appeared.
August 2, 2022 at 12:40 pmpv00170Subscriber
Also, if I used inflation I reduced the time step and now is working
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