[karamiag]

Hi guys,
does anyone know why in totalPressureFvPatchScalarField.H file it is written that for compressible transonic flows it must be gamma<=1 and for compressible supersonic it must be gamma>1?
Is that gamma the ratio of specific heats (Cp/Cv)?

3. compressible transonic (\gamma <= 1):
        \f[
            p_T = \frac{p_0}{1 + 0.5 \psi |U|^2}
        \f]
        where
        \vartable
            p_T     | total pressure [Pa]
            p_0     | reference pressure [Pa]
            G       | coefficient given by \f$\frac{\gamma}{1-\gamma}\f$
        \endvartable

    4. compressible supersonic (\gamma > 1):
        \f[
            p_T = \frac{p_0}{(1 + 0.5 \psi G |U|^2)^{\frac{1}{G}}}
        \f]
        where
        \vartable
            \gamma  | ratio of specific heats (Cp/Cv)
            p_T     | total pressure [Pa]
            p_0     | reference pressure [Pa]
            \psi    | compressibility [m2/s2]
            G       | coefficient given by \f$\frac{\gamma}{1-\gamma}\f$
        \endvartable

Thank you!

[RLFerreira]

Hi everybody, how can I desable wall function in OpenFoam? This is wall boundary condition setted for nut, k and omega with wall functions using the kOmegaSST:

nut file:
walls
{
type nutUWallFunction;
value uniform 0;
}

k file:
walls
{
type kqRWallFunction;
value uniform 0.0152696;

}

omega file:
walls
{

type omegaWallFunction;
value uniform 0;
}

Thanks. Best Regards,
Ricardo.