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August 6, 2020, 21:41 |
Mesh independent study when comparing models
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#1 |
Senior Member
dilaw meda
Join Date: Jun 2017
Location: algeria
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Hi. I am doing a numerical study on air jets. i want to compare 3 rans models: K epsilone , rsm and sst k omega. Should i do a mesh independent study for every model then comparing ?. Or i chose one model , i do the mesh study then with the suitable mesh i do simulation with the 2 other models and i compare wich model is better in my case
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August 6, 2020, 23:26 |
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#2 | |
Senior Member
Join Date: Jun 2011
Posts: 208
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Quote:
I have never noticed that the model got re-meshed by the software after I changed the turbulence mode, so I would optimize the mesh with one of the modes and run the other two turbulence modes with the same mesh. My feeling is that it will give you more realistic comparative results as well because if you change both the mesh and the turbulence mode you'd never know what is causing the difference (if any). |
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August 7, 2020, 10:04 |
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#3 | |
Senior Member
dilaw meda
Join Date: Jun 2017
Location: algeria
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August 7, 2020, 12:53 |
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#4 |
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Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,897
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My opinion is that each test would represent a different study and meaning of the comparison.
One could wonder about the best performance of several softwares and/or turbulent models on the same chosen grid. As well as one could check the statistical solution for "vanishing" grid size (provided that the model allows that). I don't think that a way of doing a comparison excludes the others. |
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August 7, 2020, 13:29 |
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#5 | |
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August 13, 2020, 01:52 |
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#6 | |
New Member
Srykia Konjha
Join Date: Aug 2020
Posts: 1
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Quote:
Last edited by winscombebob; August 14, 2020 at 02:01. |
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Tags |
jets, mesh, rans, simulation |
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