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RAS simulations of flow around wall mounted cube |
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February 13, 2013, 09:55 |
RAS simulations of flow around wall mounted cube
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#1 |
New Member
Join Date: Jan 2013
Posts: 20
Rep Power: 13 |
Greetings to all,
I am currently trying to set up an OpenFoam model for 3D flow around wall mounted cube. Here are some details on the model *Meshing- SnappyHexMesh so to get refinement qround the cube and have a mesh distribution similar to the one enclosed. *Solver - PisoFoam with k-epsilon for turbulence modelling. *Boundary conditions /chosen according to a reference paper/ **cube wall functions **channel upper wall symmetryPlane ** channel later sides symmetryPlane **channel bottom wall wallFunction ** velocity inlet- set uniform 5m/s for the moment but will use GroovyBC later> I just want to see what will happen. ** outlet inletOutlet boundary condition. *System , I had copied and adapted the fvSolution, fvSchemes and controlDirect of a k-omega model for the same case. *Turbulence parameters calculation using guidelines in user guide. Once I run simulations, it directly crashes after three time steps with unrealistic and unexpected bounding values for the courant number, k and epsilon. I saw that there were some fixes to do for the mesh too. But my biggest concern is those strange values I get when running the cases. Please, note that OpenFoam is a completely new to me and I am in the process of learning. Please could you have a look at the model and tell me how I can improve it to avoid the errors I get? Enclosed is the zip file. Notice that to run the case, the snappyHexmesh process takes some time. Sorry, I could not send the zipped folder with the files resulting from SnappyHexMesh because of size limitations. I can send it by mail upon request if needed to gain time. Thank you in advance for your help and guidance. Nore |
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