[Eric Brant]

Hi all formers,

I recently calculated a compressible flow using rhoCentralFoam and I found quite difference between the results when using different interpolationSchemes in fvSchemes file.
The default interpolationSchemes for "reconstruct()" is VanLeer(V):

interpolationSchemes
{
    default                linear;
    reconstruct(rho)    vanLeer;
    reconstruct(U)      vanLeerV;
    reconstruct(T)      vanLeer;
}

I found the result is sort of over dissipation, but when I use Gamma

interpolationSchemes
{
    default                linear;
    reconstruct(rho)    Gamma    0.2;
    reconstruct(U)      GammaV  0.2;
    reconstruct(T)      Gamma    0.2;
}

the results are better. I don't know why they are different since they are all second order schemes. It means that VanLeer is more numerical diffusive?
Any suggestions?