|April 22, 2014, 15:25||
Abe-Kondoh-Nagano low-Re k-epsilon model
Join Date: Mar 2012
Posts: 11Rep Power: 5
I recently implemented the low-re k-epsilon model by Abe, Kondoh and Nagano.
(Abe K., Kondoh T., Nagano Y., 1994. A new turbulence model for predicting fluid flow and heat transfer in separating and reattaching flows-I. Flow field calculations. Int. J. Heat and Mass Transfer 37(1), pp 138-151).
It's probably the low-re ke model that is best suited for heat transfer problems.
This version should be the most stable among those by Nagano et al, as it uses an easy wall condition for epsilon.
At the wall:
epsilon=2*nu*k1/y1^2, where k1 and y1 are the cell-center values at the wall.
This wall function for epsilon is already implemented in openfoam: epsilonLowReWallFunction.
It was intended for the v2f model, but it's the same, at least for low-re cases.
(there may be a problem with the code of epsilonLowReWallFunction (see here), but it doesn't seem to affect this model too much).
If anyone is interested, you can find the model attached to this post.
it is called AbeKondohNaganoKE. just compile it and then add this to controldict:
libs ( "libOpenFOAM.so" "AbeKondohNaganoKE.so" );
So let me know if I missed anything.
|March 21, 2015, 12:04||
Join Date: Mar 2009
Location: Lisbon, Portugal
Blog Entries: 34Rep Power: 92
I've created a basic wiki page for to help getting your turbulence model a bit better known to the community that uses OpenFOAM technology: http://openfoamwiki.net/index.php/Co...-epsilon_model
May you or anyone else feel free to update that wiki page!
|abe, k-epsilon, kondoh, low-re, nagano|
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