Framework of the Mesh
Hi,
I have mesh generated with Pointwise and this program generates circular mesh frameworks. This means that I can't specify inlet and outlet conditions, so I have the same conditions around the radius of the mesh. I thought , the circular shape doesn't matter for simulating flows around airfoils. Now I have doubts about this :confused:. I think it should matter, doesn't it ??? generating mesh is easy but I do not know how to change the framework of the mesh. |
problems due to framework of the mesh
I have convergence problems due to the framework of mine mesh. I am trying to solve this issue with the icoFoam solver.
The framework of the mesh is represented with one patch, so I can't specify inlet/oulet separately ( this would solve my problem). How should I define this one important patch ? I have used inletOutlet but the system doesn't converge.U file Flow { type inletOutlet; inletValue uniform (25 0 0); value uniform (25 0 0); } p file Flow { type outletInlet; outletValue uniform 0; value uniform 0; } How should I define this patch :confused: |
Hello,
here is a long thread I started some time ago: http://www.cfd-online.com/Forums/ope...parison-2.html Go through it, around post 35 I started to use a circular domain (generated with fluent, but this does not matter). There is a lot of information on how your bc should be set and some more about convergence issues. Exactly what you are looking for, aren't you ;)? mad |
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Indeed it is almost what I want, only you have 3D case. For testing I am using icoFoam and than I will go to kepsilon. I am now using inletOutlet for U and p. But still it is not converging. maybe there is a bug in openfoam version 1.7.1 :confused: |
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mad |
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Thank you :) . I found an other very important problem: the trailing edge is perpendicular to the flow, which gives convergence problems. It seems Openfoam can't handle that part with normal mesh size :D . Maybe it is a good idea to choose an other airfoil. |
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