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-   -   Possible missing turbulent stress terms in sonicTurbFoam (http://www.cfd-online.com/Forums/openfoam-bugs/62373-possible-missing-turbulent-stress-terms-sonicturbfoam.html)

srinath November 25, 2008 13:46

Description Certain terms suc
 
Description
Certain terms such as laminar viscosity and work done by turbulent/laminar viscous stresses seem to be ignored.

Solver
sonicTurbFoam

sourceFiles
sonicTurbFoam.C, hEqn.H

Version
1.5

Notes
line 63
fvVectorMatrix UEqn
(
fvm::ddt(rho, U)
+ fvm::div(phi, U)
+ turbulence->divDevRhoReff(U)
);
--Laminar viscous stress not taken into account. Possibly igonored because it is negligible compared to Turbulent viscosity. But what about effect of bulk viscosity at high Mach no's for compressible flows?

file hEqn.H
solve
(
fvm::ddt(rho, h)
+ fvm::div(phi, h)
- fvm::laplacian(turbulence->alphaEff(), h)
==
DpDt
);
--Work done by turbulent viscous surface stress does not appear to be taken into account.

Srinath

henry November 25, 2008 16:10

Yes currently ignored as they
 
Yes currently ignored as they are small in general but they are easy to include if required by your particular application.

H

srinath November 26, 2008 02:59

Thanks Henry
 
Thanks Henry


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