CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Running, Solving & CFD (http://www.cfd-online.com/Forums/openfoam-solving/)
-   -   clarification regarding dev(symm(grad(U))) in Smagorinsky model (http://www.cfd-online.com/Forums/openfoam-solving/77605-clarification-regarding-dev-symm-grad-u-smagorinsky-model.html)

vishwa June 28, 2010 17:04

clarification regarding dev(symm(grad(U))) in Smagorinsky model
 
Hi,
The subgrid stress tensor T_ij = (1/3)*d_ij*T_kk - 2*nu_sgs*Sbar_ij

I am pretty sure that T_ij is referred to as B in OF.

Now (1/3*d_ij*T_kk) = (2/3)*k*I

And Sbar_ji is 0.5*(dU_i/dx_j + dU_j/dx_i)

That can be found by symm(grad(U)).

could anybody explain to me why do we use dev(symm(grad(U)) ?

Best Regards,
Vishwa


All times are GMT -4. The time now is 20:26.