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Equivalent sand grain roughness alternatives

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Old   May 8, 2018, 09:51
Default Equivalent sand grain roughness alternatives
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Arun subramanian
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Hello !

Are there approaches to model the roughness effects in the RANS equations for wall corrections other than the usual equivalent sand grain roughness ?

I understand it is the most used approach , but i would like to explore others in RANS LES or DNS ( In DNS how the meshing is done ,instead of wall corrections) . Will be thankful if I can atleast get some papers or links to look at


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Arun
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Old   May 8, 2018, 11:27
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Originally Posted by arun1994 View Post
Hello !

Are there approaches to model the roughness effects in the RANS equations for wall corrections other than the usual equivalent sand grain roughness ?

I understand it is the most used approach , but i would like to explore others in RANS LES or DNS ( In DNS how the meshing is done ,instead of wall corrections) . Will be thankful if I can atleast get some papers or links to look at


Cheers,
Arun


There are interesting papers exploring DNS in some ways:

https://www.researchgate.net/profile...-sandpaper.pdf

https://www.cambridge.org/core/journ...A1D2E28F204A6C

https://ntrs.nasa.gov/archive/nasa/c...0170000677.pdf
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Old   May 8, 2018, 11:32
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Thank you very much , I will look into them. Do you have any papers that account roughness without using equivalent sand grain roughness please?
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Old   May 8, 2018, 11:33
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Thank you very much , I will look into them. Do you have any papers that account roughness without using equivalent sand grain roughness please?
No I never used such model but I suggest to have a look into journals like PoF and JFM.
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Old   May 8, 2018, 11:34
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Grazieeee!
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Old   May 9, 2018, 11:38
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An example of LES application
https://www.researchgate.net/publica...cular_cylinder
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