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-   -   mshaADD A NEW RELATION TO kepsilon MODEL (http://www.cfd-online.com/Forums/openfoam-solving/59249-mshaadd-new-relation-kepsilon-model.html)

msha December 30, 2007 10:31

HI I want to use the follow
 
HI

I want to use the following relation


R_=(2*k_/3)*I + ((k_*(1-Clrr2))/(Clrr1+Glrr/epsilon_-1))*(Plrr/epsilon_ - (2*Glrr/(3*epsilon_))*I)

[where

Plrr = -twoSymm(Rlrr_ & fvc::grad(U_))


Glrr =0.5*tr(Plrr)

and Clrr1,Clrr2 are constants.]


in k-epsilon model insted of bossinesque relation:

{(2.0/3.0)*I*k_ - nut_*2*symm(fvc::grad(U_))}

for reynolds stress tensor.


HOW I CAN DO THIS?

ANY COMMENT IS APPRECIATED DEEPLY.

THANKS IN ADVANCE.

MSHA

msha December 31, 2007 02:21

help pls
 
help pls

gschaider January 1, 2008 14:34

I guess you'll have to impleme
 
I guess you'll have to implement a new turbulence model. For instance have a look at:
http://openfoamwiki.net/index.php/Sig_Turbomachinery_/_Tutorials#How_to_implemen t_a_new_turbulence_model_.28OF-1.4.1.29

msha January 6, 2008 08:06

HI Bernhard Gschaider AND
 
HI Bernhard Gschaider

AND thank you

but I know much more than that the page you have addressed .my probles is an error you can see in previous my message

THANKS ANY WAY


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