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[snappyHexMesh] sHM makes bumps and does not resolve the edge |
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May 12, 2020, 12:25 |
sHM makes bumps and does not resolve the edge
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#1 | |
New Member
Leegunho
Join Date: Jul 2019
Posts: 11
Rep Power: 6 |
Hi, Foamer!
I'm trying to do CFD on supersonic intake to measure the performance of the inlet I extracted STL files of each patch with Salome and used SurfaceFeatureExtract. However, the sHM does not resolve sharp edges and makes bumps on the surface. Here is my snappyHexMeshDict. Any advise would be a great help, THANKS! Quote:
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May 12, 2020, 17:07 |
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#2 |
Senior Member
Herpes Free Engineer
Join Date: Sep 2019
Location: The Home Under The Ground with the Lost Boys
Posts: 932
Rep Power: 12 |
Hi,
- Would you mind to visualise the STL surface meshes, please? - Would you please attach "surfaceCheck" results on these STL surface meshes as well? - If it is fast, would you turn off the mesh quality checks, and run snappy? - Would refining the background blockMesh be possible for you? - For surface bumps, I'm surprised. snappy can handle this for sure. There should be a problem somewhere. - May be increasing the tolerane for the skewness metrics (boundary) may help. - Please see detailed settings of snappy: https://www.openfoam.com/documentati...pyhexmesh.html - Do you use OF 2.2? If so, please do consider to update to a more recent version - assuming you do use .org variant, OF-7 is available. Hope these help.
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May 13, 2020, 01:26 |
Bump issue solved, Diverging problem arises
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#3 | ||||
New Member
Leegunho
Join Date: Jul 2019
Posts: 11
Rep Power: 6 |
Quote:
Thank you for your reply!! I solved my problem by refining blockMesh and surfaceRefinement I'm not that satisfied with resolution of the intersection, but i think it might be OK. Actually i'm facing another problem. rhoCentralFoam and rhoSimpleFoam diverges and i have no idea why. Could you plz check my boundary condition looks OK? It is supersonic aircraft intake with inlet M = 4.5, T = 60K, P = 1100Pa Inviscid simulation(slip on the wall) makes no errors but laminar simulation(noSlip on the wall) makes Floating point exception error. i attached my boundary condition files. Patch name 'freestream' is same with 'outflow' on the picture above. I tried several meshes but none of them sovled the issue. It might not be a problem of the mesh i think. Again, THANK YOU for your reply!! Quote:
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May 13, 2020, 01:28 |
Pictures
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#4 | |
New Member
Leegunho
Join Date: Jul 2019
Posts: 11
Rep Power: 6 |
Quote:
I forgot to attach the image files here are my domain and resolved mesh image. |
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May 13, 2020, 16:16 |
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#5 |
Senior Member
Herpes Free Engineer
Join Date: Sep 2019
Location: The Home Under The Ground with the Lost Boys
Posts: 932
Rep Power: 12 |
Hi
- Could you please check the mesh quality in terms of mesh metrics by executing `checkMesh -allGeometry -allTopology -latestTime`?
__________________
The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror |
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November 1, 2021, 08:36 |
STL files
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#6 |
New Member
Afshin Davarpanah
Join Date: Oct 2021
Posts: 5
Rep Power: 4 |
Hello Everyone
I have a problem when I want to convert STL files in Openfoam. It doesn't open in this software. I would be so glad if someone can help me in this regard. Thanks Afshin |
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