boundary condition porblem..
HI Julienn
thanks for taking the time and check my case.. for starters i had already try with symmetryPlane and below was my error Quote:
I hope you be able to help...:( :( |
I had a look at your case and tried to run a few sims.
My take is that the mesh is probably the root of the issue. I tried to take things away: - turn turbulence off; - use upwind scheme; - reduce residuals; - use a potentialFoam solution; - change the outlet boundary conditions; - tighten solver residuals. The following picture shows the non-physical spike of velocity after as little as 10 iterations. Sorry, but I can't help further. https://dl.dropboxusercontent.com/u/...e-14102013.png |
hello Julien..
First of ALl thanks a lot for the useful and intelligent pointers you gave to me.. As wih simpleFoam its not working at all.. I have used pisoFOam and still it not work. But with pisoFoam i include the boundary cond of symmetryPlane.. so lo and behold... the FLow is being as i wanted!!! Thanks heapsssss..... But with pisoFoam, it takes along timeeeee to finish iterating and acheive convergence.. i am now at 20319 second and its sill going strong in iteration.. But at least its giving the required results.. |
Following your post: you may want to try changing:
Code:
nNonOrthogonalCorrectors 0; Code:
nNonOrthogonalCorrectors 5; |
thanks am trying it right away..
I am obtaining superb resutls with pisofoam. but WHY DOES IT TAKE SOO MUCH TIME TO ITERATE??? |
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