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-   -   Compressible navier stokes (http://www.cfd-online.com/Forums/main/14094-compressible-navier-stokes.html)

fatih September 14, 2007 08:37

Compressible navier stokes
 
Hi all

I need a correct equation for compressible NS I see the equations are different

The density in momentum equations are treated differently e.g:: rho*u1*du1/dx+rho*u1*du2/dy+....

but in another equation d(u1*rho)/dx+.....

Why they are different? Thanks in advance , Selim

Karper October 1, 2007 17:31

Re: Compressible navier stokes
 
Hi,

I guess you are refering to the convective term in the momentum equation?

If so, you can use the continuity equation to move from one formulation to the other..



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