About the non-orthogonal mesh and non-orthogonal corrector
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Hello everyone
I used a modified solver to simulate a circular pipe flow.The mesh is non-orthogonal.So I think I need use non-orthogonal corrector in the fvSchemes. But the results is not good as the time developing.It seems that the mesh have great influence to the velocity.I have attached my velocity contours and mesh here.I hope you can help me to analysis the the fvSchemes I used. I think the problem maybe lie in the non-orthogonal corrector,but I don't have enough experience.I set the fvSchemes as following: Code:
ddtSchemes regards! lg88 |
Hi lg88,
What do you have in "system/fvSolution"? I'm asking this because the number of correctors is defined on that file: http://www.openfoam.org/docs/user/fvSolution.php Best regards, Bruno |
Thank you for your reply.I set my fvSolution as following:
Code:
solvers Best regards! lg88 |
Hi lg88,
I'm not experienced enough on this, but I suggest that you also provide the following details, so that someone with more experience can help you during this week:
Bruno |
Hi Bruno
I run the command Code:
checkMesh Code:
Checking geometry... I modified my solver according icoFoam. The fluid in my case is not a real material.I set its density to 1,kinematic viscosity 0.001,velocity 1 and Reynolds number 1000. Then I modified the laplacianSchemes from Code:
{ Code:
{ I have no ideal about it. Thanks for your advice. regards! lg88 |
Hello everyone
When I set the laplacianSchemes from: Code:
{ Code:
{ regards! lg88 |
In my point of view your skewness looks a bit high (0.8). I had a similar problem that I solved by introducing a skewcorrector. You can look at my scheme here http://www.cfd-online.com/Forums/ope...om-solver.html
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Sorry for the stupid question but I am curious:
If it is a simple, straight pipe, why do you not have a square block in the middle? Why are its edges curved in this manner? Maybe changing this may improve your mesh properties and therefore correct your solution. |
I guess he used a "smoothing" function from his grid generator. Sometimes I get the same kind of restults with Pointwise.
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