[dav.dap83]

Hi everyone,

I am running this case to understand how interFoam manages gravity. It consists of a horizontal pipe with Newtonian laminar flow, with a vertical gravitational field. The pipe length is chosen so that the flow is fully developed at the outlet.

You can see from the attached image that the flow at the outlet seems not to be affected by the gravity, as it depicts a typical pipe flow profile without gravity.

I cannot explain the this behaviour. Perhaps did I make something wrong at the boundary conditions?

0/p_rgh

dimensions      [1 -1 -2 0 0 0 0];

internalField   1e5;

boundaryField
{
    inlet
    {
        type            fixedFluxPressure;
    }

    outlet
    {
        type            totalPressure;
        p0              uniform 0;
        phi             phi;
        U               U;
        rho             rho;
        psi             none;
        gamma       0;
        value           uniform $internalField;
    }

    fixedWalls
    {
        type            fixedFluxPressure;
    }

}

0/U

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    inlet
    {
        type            fixedValue;
        value           uniform (0 0 0.5);
    }

    outlet
    {
        type            zeroGradient;
    }

    fixedWalls
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }

}

Thank you in advance

[santiagomarquezd]

The solution is correct.

Regards.