[Nidalsb]

Hi,

I am using an inlet and an outlet pressure to try and solve an incompressible flow problem.

The issue I am facing is that my solver always fails due to a high courant number no matter what I use. I tried Simple, Pimple, Piso.

Please let me know if you can find a mistake in my code below.

PS: You can think of my problem as a box with a few internal walls directing the flow.

My P:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.0                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    object      p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

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

internalField   uniform 0;

boundaryField
{
    xmin
    {
	type         totalPressure;
	p0           uniform 130000;
        value        $internalField;

    }

    xmax
    {
	type         totalPressure;
	p0           uniform 100000;
        value        $internalField;

    }

    ymin
    {
	type            zeroGradient;
    }

    ymax
    {
	type            zeroGradient;
    }

    zmin
    {
	type            zeroGradient;
    }

    zmax
    {
	type            zeroGradient;
    }
    
   internalWall
    {
        type            zeroGradient;
    }
}

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

My U:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.0                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

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

internalField   uniform (0 0 0);

boundaryField
{
    xmin
    {
        type            pressureInletVelocity;
	value		$internalField;
    }

    xmax
    {
	type 		pressureInletOutletVelocity;
	value		uniform (0 0 0);
    }

    ymin
    {
        type            noSlip;
    }

    ymax
    {
        type            noSlip;
    }

    zmin	
    {
        type            noSlip;
    }

    zmax
    {
        type            noSlip;
    }

    internalWall
    {
        type            noSlip;
    }
}

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