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Useful LES tools in Fluent - Part 3

Posted October 21, 2013 at 07:06 by sbaffini (NuTBox)
Updated December 21, 2013 at 04:17 by sbaffini (Update)

These are the implementations of two static SGS models, due to Vreman and Nicoud (see the attached files for the detailed references). These models are in the same spirit of the well known WALE model; still, they are different in several aspects.

The models are provided without any kind of warranty; still, no specific problem came up during testing.

For wall bounded turbulent flows in Fluent i strongly suggest the Vreman model due to its specific, theoretically wrong,...
Attached Files
File Type: c vreman.c (1.7 KB, 123 views)
File Type: c svd_sgsmut.c (2.3 KB, 118 views)
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Useful article about mesh types

Posted September 23, 2013 at 01:08 by skeptik (CFD notes)

Polyhedral, Tetrahedral, and Hexahedral Mesh Comparison
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NACA23012 numerical modelling, wing body in tube

Posted September 19, 2013 at 07:42 by skeptik (CFD notes)

Result line fit really good.
And it's much more better than 2D calculations of the same airfoil

Cx, Cy
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2D results
Name:  kOmega_Epsilon.jpg
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Rating: 4 votes, 4.75 average.

OpenFOAM: Interesting cases of bad meshes and bad initial conditions

Posted September 15, 2013 at 06:03 by wyldckat

This year (2013) has been an interesting one for me, regarding OpenFOAM. Even beyond the amazing features that OpenFOAM 2.2 brought to the world (at least to my world) and everything that I keep discovering about it.

This blog post is about the various threads/posts were I took the time to diagnose what was specifically wrong with the case and where the bad results are astonishingly wrong... simply because the details were not easily seen. The list might get updated along time, as I...
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Wave Action Equation Solver for OpenFOAM

Posted September 3, 2013 at 07:18 by egp

Hi Tom,

This sounds like an interesting problem! Ignoring the wave space issue for a moment, I think you need to first cast the problem as a 2D surface using either the finiteArea machinery of 1.6-ext, or the thin film model in 2.2.x (see reactingParcelFilmFoam).

The wave space issue is a bit more complex and I don't have a good recommendation for an elegant solution. Brute force for a fixed number of wave-space bins would be doable, but ugly. What is the typical...
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