# simpleFoam for complicated geometry, non-orthogonal mesh, omega wall function

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 July 27, 2012, 06:00 simpleFoam for complicated geometry, non-orthogonal mesh, omega wall function #1 Member   achinta Join Date: May 2010 Location: Sydney Posts: 66 Rep Power: 13 Hello everyone, I am using simpleFoam on complicated geometry (non orthogonal mesh). Here is the checkMesh report: -------------- Mesh stats points: 6487723 faces: 19200050 internal faces: 18938278 cells: 6356388 boundary patches: 16 point zones: 0 face zones: 0 cell zones: 0 Overall number of cells of each type: hexahedra: 6356388 prisms: 0 wedges: 0 pyramids: 0 tet wedges: 0 tetrahedra: 0 polyhedra: 0 Checking topology... Boundary definition OK. Cell to face addressing OK. Point usage OK. Upper triangular ordering OK. Face vertices OK. Number of regions: 1 (OK). . . Mesh (non-empty, non-wedge) directions (1 1 1) Mesh (non-empty) directions (1 1 1) Boundary openness (9.64958e-17 2.34786e-15 -6.13025e-16) OK. Max cell openness = 4.58304e-15 OK. Max aspect ratio = 299.485 OK. Minumum face area = 3.41806e-11. Maximum face area = 0.000249108. Face area magnitudes OK. Min volume = 1.22828e-14. Max volume = 4.16394e-07. Total volume = 0.20005. Cell volumes OK. Mesh non-orthogonality Max: 87.0638 average: 19.2898 *Number of severely non-orthogonal faces: 18931. Non-orthogonality check OK. <

 October 20, 2013, 09:22 how did u determine k and omega for complicated geometry #2 Senior Member     Hasan K.J. Join Date: Dec 2011 Location: Bristol, United Kingdom Posts: 200 Rep Power: 12 Hey achinta, I am stuck with similar problem but I'm a one step before u How did u determine the K and Omega for the complicated geometry, and did u over come the problem ? i am having the same problem Regards, Hasan.

October 25, 2013, 00:58
k and omega
#3
Member

Dr. B T KANNAN
Join Date: Jul 2011
Posts: 55
Rep Power: 11
Quote:
 Originally Posted by Alhasan Hey achinta, I am stuck with similar problem but I'm a one step before u How did u determine the K and Omega for the complicated geometry, and did u over come the problem ? i am having the same problem Regards, Hasan.
Dear Hasan,
Try to calculate k and epsilon from the intensity and velocity, which you know for inlet. If not, get it from experiments(available in literature). Then calculate omega by omega=epsilon/k
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KANNAN