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[snappyHexMesh] SnappyHexMesh AddLayer Control |
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May 14, 2013, 10:14 |
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#21 |
Member
Mehdi GHOZALI
Join Date: May 2013
Location: Dubai, UAE
Posts: 65
Rep Power: 12 |
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May 14, 2013, 14:30 |
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#22 | |
Member
Andreas Wendy
Join Date: Aug 2012
Posts: 73
Rep Power: 13 |
Quote:
hi mehdi, not for the whole time. only to check if the boundary conditions are ok. so use laminar model first check if the calculation works. if not modify the case until the laminar case works. then try to use the tubulence model best wishes andy |
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May 15, 2013, 03:14 |
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#23 |
Member
Mehdi GHOZALI
Join Date: May 2013
Location: Dubai, UAE
Posts: 65
Rep Power: 12 |
Okay I will try it today
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May 17, 2013, 01:45 |
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#24 |
Member
Andreas Wendy
Join Date: Aug 2012
Posts: 73
Rep Power: 13 |
hi,
did the laminar computation worked? Andy |
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May 17, 2013, 03:52 |
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#25 |
Member
Mehdi GHOZALI
Join Date: May 2013
Location: Dubai, UAE
Posts: 65
Rep Power: 12 |
hi,
Nop it doesn't work and I know why, I have a problem with the thickness of the boundary layer (y+) it has to be around 30 and I have 20000 (yeah I'm way to far) so I have to refine the mesh in the snappyHexMesh but the problem is that when I turn on the snap and lunch snappyHexMesh I don't have the smooth part on paraview. do you know what do I have to change? I atteched my blockMesh and snappyHexMesh (be carefull it takes time to do it cause I have more the 5 millions cells) Thank you Mehdi |
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May 28, 2014, 22:21 |
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#26 |
Member
J.-H. Wang
Join Date: Oct 2010
Posts: 72
Rep Power: 15 |
Hello all,
I've been playing with the addLayer control and can seem to make it work. The geometry I have is similar to the original post, a big cube with a small cube subtracted inside. The snappyHexMeshDict of mine looks like Code:
addLayersControls { layers { "cube.*" { nSurfaceLayers 3; } } relativeSizes true; expansionRatio 1.1; finalLayerThickness 0.3; minThickness 0.1; nGrow 0; featureAngle 30; slipFeatureAngle 30; nRelaxIter 5; nSmoothSurfaceNormals 1; nSmoothNormals 3; nSmoothThickness 10; maxFaceThicknessRatio 0.5; maxThicknessToMedialRatio 0.3; minMedianAxisAngle 90; nBufferCellsNoExtrude 0; nLayerIter 50; nRelaxedIter 20; nLayerIter 50; } Code:
geometry { cube.stl { type triSurfaceMesh; name cube; } box10x10x10 { type searchableBox; min (-5 -5 -5); max ( 5 5 5); } }; JHW |
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May 29, 2014, 00:46 |
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#27 |
Member
Mehdi GHOZALI
Join Date: May 2013
Location: Dubai, UAE
Posts: 65
Rep Power: 12 |
Hi JHW,
I am a bit busy right now, but I will look it up this week end and let you know what's wrong (or maybe nothing wrong). Hope by that time you will have an answer if not I will try my best to respond soon. Regards, Dadou |
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May 29, 2014, 09:38 |
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#28 |
Member
J.-H. Wang
Join Date: Oct 2010
Posts: 72
Rep Power: 15 |
Hi,
Thanks for the offer. Is my understanding about the name of the patch correct? The blue font and the red font should match? JHW |
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May 30, 2014, 05:32 |
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#29 |
Senior Member
Eloïse
Join Date: Jul 2012
Location: Trondheim, Norway
Posts: 113
Rep Power: 13 |
Hi JHW,
Look at you boundary file after mesh generation. You'll find there the name of the existing patches in your mesh. Re-use those names to insert your layers. I hope that helps, Regards, Eloïse |
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