Ansys Learning Forum › Forums › Discuss Simulation › Fluids › execution error for FENSAP /On the other hand no problem for Fluent › Reply To: execution error for FENSAP /On the other hand no problem for Fluent
July 27, 2021 at 9:35 am
Shoaib Shah
Ansys Employee
Hi again
Yes as you mentioned that mesh has some issues. Every solver is different. Fluent has some extra poor mesh numerics to help run with poor meshes, but it does not necessarily mean your final solution is good or the right one, especially in areas where you have poor mesh points. You should verify your solution near those poor mesh cells, especially if it is in area of interest. Also, it depends on how you have setup Fluent, i am not aware of your solver settings and choices and/or convergence.
In general, you should try to fix the mesh first, that way you ensure you have a good final solution and a good starting point.
As far as FENSAP is concerned, there could be many reasons why your case is not working. It could be because of poor FENSAP setup? Poor mesh? Did you setup the inlet boundary conditions correct? What CFL are you using? How bad is the mesh near the surface, and in particular the prisms near the area of bad mesh points? Also how have you set up your inlet as a Farfield BC or an inlet/outlet BC? Also what mesh type are you using ? - Tet only? Hybrid tet/prism ?
Please also share some images of the mesh, where the surface mesh is poor. But also if possible share some pictures of the mesh, in general e.g. near the leading edges, trailing edge, of some cutting planes showing prisms and general mesh transition from boundaries to volume.
A problem like this, it would be best to share the setup and mesh to help troubleshoot better.
Let us know. Cheers.
Yes as you mentioned that mesh has some issues. Every solver is different. Fluent has some extra poor mesh numerics to help run with poor meshes, but it does not necessarily mean your final solution is good or the right one, especially in areas where you have poor mesh points. You should verify your solution near those poor mesh cells, especially if it is in area of interest. Also, it depends on how you have setup Fluent, i am not aware of your solver settings and choices and/or convergence.
In general, you should try to fix the mesh first, that way you ensure you have a good final solution and a good starting point.
As far as FENSAP is concerned, there could be many reasons why your case is not working. It could be because of poor FENSAP setup? Poor mesh? Did you setup the inlet boundary conditions correct? What CFL are you using? How bad is the mesh near the surface, and in particular the prisms near the area of bad mesh points? Also how have you set up your inlet as a Farfield BC or an inlet/outlet BC? Also what mesh type are you using ? - Tet only? Hybrid tet/prism ?
Please also share some images of the mesh, where the surface mesh is poor. But also if possible share some pictures of the mesh, in general e.g. near the leading edges, trailing edge, of some cutting planes showing prisms and general mesh transition from boundaries to volume.
A problem like this, it would be best to share the setup and mesh to help troubleshoot better.
Let us know. Cheers.
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