I am doing a counter-flow heat exchanger simulation in ANSYS student version.
After I setup, I always got error "floating point exception" in calculation.
Please can somebody solve my problem?
There are my all the details:
It is recirculated exhaust gas heat exchanger which used in gas turbine. It is 200mm long with 60mm diameter.
In my geometry, this heat exchanger consists of three parts, hot air fluid domain (outer domain) , 4 solid pipes and 4 inner fluid domain (2 methane and 2 air). As you can see, there are 8 interfaces in total.
This is my meshing. I used adaptive sizing function to get less cells (119610 nodes and 326512 elements). And 4 edge sizing for pipes (20 Division hard). I don't use culvature size function because it will lead to 3300000 elements which I can't run it in student version.
This is my skewness data.
However, in my setup part. There are my setting.
Density on Y direction 9.81
Energy Equation On
Viscous - Realizable k-e Scalable Wall Function\
Materials are air, methane and steel
Cell Zone Conditions.
I didn't coupled my interfaces in Mesh Interfaces.
In my Boundary Condition. There are 2 air mass- flow-inlet, 2 methane mass-flow-inlet, 1 hot mass-flow-inlet. And 5 pressure outlet in total.
All the wall material has been set to Steel.
If you need more details, please leave a comment.
Thank you very much!