Controlling y+ values with snappyHexMesh?
Posted November 30, 2017 at 13:04 by kindle
This can be useful y+ control !
Quote:
Originally Posted by seaspray
Pete,
It might have got easier in the more recent versions. In a nutshell, you mesh your volume with a suitable algorithm (tets or hexa i,j,k) and viscous layers are added as an "additional hypothesis" in the 3D algorithm settings. In there, you have the option of excluding some faces in your geometry, like inlet, outlet, but also areas where you don't care as much about flow modeling like in some multiphase flow computations. Layers are not available with all meshing algorithms.
Otherwise you just set your 2D and 1D meshing parameters the normal way.
If you then submesh a face with different parameters (quadrangles for example) and this face has viscous layers, they should retain the structure of the face.
Salome can grow very nice viscous layers, but there is a known bug in the current version 7.3.0 that crashed the layer algorithm at the start for me. It is fixed in 7.4.0 due to come out any time now I was told.
Have a look, and I could put an example together for you if it helps.
Regards,
Eric
It might have got easier in the more recent versions. In a nutshell, you mesh your volume with a suitable algorithm (tets or hexa i,j,k) and viscous layers are added as an "additional hypothesis" in the 3D algorithm settings. In there, you have the option of excluding some faces in your geometry, like inlet, outlet, but also areas where you don't care as much about flow modeling like in some multiphase flow computations. Layers are not available with all meshing algorithms.
Otherwise you just set your 2D and 1D meshing parameters the normal way.
If you then submesh a face with different parameters (quadrangles for example) and this face has viscous layers, they should retain the structure of the face.
Salome can grow very nice viscous layers, but there is a known bug in the current version 7.3.0 that crashed the layer algorithm at the start for me. It is fixed in 7.4.0 due to come out any time now I was told.
Have a look, and I could put an example together for you if it helps.
Regards,
Eric
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