[egp]

Hi,

I am running rasInterFoam for a free-surface piercing NACA 0024 hydrofoil at Fr = 0.55. Overall, the solution looks quite good with nice resolution of the bow wave, the wave profile, and the spilling breaking wave.

So, what's the issue? I've run both coarse (~0.3M cells) and fine (~2M cells) hex meshes, and have some non-physical small amplitude waves in the gamma field which are seen on the gamma=0.5 iso-surface (i.e., the free surface).

Anyone have suggestions on fvSchemes settings to eliminate this problem? I am using standard rasInterFoam settings,

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

ddtSchemes
{
default Euler;
}

gradSchemes
{
default Gauss linear;
}

divSchemes
{
div(rho*phi,U) Gauss upwind;
div(phi,gamma) Gauss limitedLinear01 1;
div(phirb,gamma) Gauss limitedLinear01 1;
div(phi,k) Gauss upwind;
div(phi,epsilon) Gauss upwind;
div(phi,R) Gauss upwind;
div(R) Gauss linear;
div(phi,nuTilda) Gauss upwind;
}

laplacianSchemes
{
default Gauss linear corrected;
}

interpolationSchemes
{
default linear;
interpolate(HbyA) linear;
}

snGradSchemes
{
default corrected;
}

fluxRequired
{
default no;
pd;
pcorr;
gamma;
}


// ************************************************** *********************** //

To get an idea of what I am seeing, I've put a couple of animations (naca0024...) for download at:

http://homepage.mac.com/egpaterson/FileSharing2.html

Thanks,

Eric