Solver crashes - bad mesh?
Hi All,
I'm pretty new as a CFD practitioner, especially OF, so bare with me. (My background is in applied aero, as a test engineer.) I'm creating a test case where I want to run compressible flow around a model, with turbulence. I have the model via .stl files, and I'm able to create a mesh via snappyhexMesh. For now, I'm not too worried about how good the mesh is, I just need to go through the process; obviously a good mesh is a goal, just not mandatory at this stage. When I try to run the solver, it gets setup to go, loads info from the various dictionaries, then crashes hard. I realize this is the plight of CFD, just looking for some direction on how to proceed. What I think is happening, due to the following in the snappy output, is the mesh cells are not meeting up properly with the model cells: Code:
total attraction master points: 164912 attraction to: Any suggestions? |
It would be great, if you could post the complete output of checkMesh
|
I'd rather not, due to the sensitivy of the work. If it's really that critical I can rename the model and post the file for you. Can you give me some suggestions as to what I should be looking for in checkMesh?
A couple things that caught my untrianed eye: At time = 0: Code:
Mesh OK. And at time = 1, I get: Code:
Checking geometry... Thanks for any help! :) |
No problem :)
|
Forgot to throw this up before...output from the solver (sonicFoam) just before it crashes:
Code:
Create time Thanks! |
I'm not familiar with sonicFoam, but the maximum Courant number is 28. Try to decrease it.
|
resolution
See this post for the resolution I came across to my problem:
http://www.cfd-online.com/Forums/ope...tml#post542729 And regarding Courant number, I did modify my original mesh and reduce the timestep to get it more reasonable. Thanks for the help everyone. Cheers! |
All times are GMT -4. The time now is 15:57. |