[bastil]

Dear Foamers,

we are currently struggling with the total pressure inlet BC (totalPressure). We do not fully understand the meaning of some of the require parameters in the "p"-File:

/* PRESSURE INLET */
    patchname_pressureinlet
    {
        type            totalPressure;
        p0              uniform 1.e5; /* Total pressure p0 = p + 1/2*rho*U^2 */
        U               U;
        phi             phi;
        rho             rho;/none;
        psi             psi;/none;
        gamma           1;
    }

We are not aware of the meaning of phi, rho, psi and gamma. Looking into the sources I found the following error:

        FatalErrorIn
        (
            "totalPressureFvPatchScalarField::updateCoeffs()"
        )   << " rho or psi set inconsitently, rho = " << rhoName_
            << ", psi = " << psiName_ << '.' << nl
            << "    Set either rho or psi or neither depending on the "
               "definition of total pressure." << nl
            << "    Set the unused variables to 'none'."
            << "\n    on patch " << this->patch().name()
            << " of field " << this->dimensionedInternalField().name()
            << " in file " << this->dimensionedInternalField().objectPath()
            << exit(FatalError);

We are unsure how to set phi, rho, psi and gamma "consitantly". We want to use it with the rhoSimpleFoam-solver.

• Does it depend on the solver type? (pressure-based/density-based?).
• However, we see differences when using the different formulations.
• It can also be seen from the sources that calculation of the boundary values are depending on the formulation. So we need to know how to set these values.

It would be very helpful if somebody can comment on this. Thanks.