[mikeR]

Hi CFD-Community!

I'm very new to cfd simulations, especially I just started with openFoam. I'm kinda stuck on probably the most basic examples using icoFoam, maybe someone can spot my stupid mistake

Minimal test case: A simple small rectangular capillary - internal pressure 0.1Pa - with a pressure inlet on one side. It is assumed that there is an infinite volume with with a fixed pressure of 1000Pa connected to the inlet so we can assume there will be a constant flow into the capillary (for simplicity I assume the pressure is equal to the kinematic pressure).

The simulation is running without errors but when I view the data in paraFoam I would assume that after some time the pressure within the capillary should reach 1000Pa. This is however not the case, the pressure is somewhere in the magnitude of 1xE-16.
My p file:

dimensions      [0 2 -2 0 0 0 0];
internalField   uniform 0.1;
boundaryField
{
    Inlet
    {
        type            fixedValue;
        value           uniform 1000;
    }
    Walls
    {
        type            zeroGradient;
    }

My U file:

dimensions      [0 1 -1 0 0 0 0];
internalField   uniform (0 0 0);
boundaryField
{
    Inlet
    {
        type            pressureInletVelocity ;
        value           uniform (0 0 0);
    }
    Walls
    {
        type            zeroGradient;
    }

In my blockMeshDict is specified the Inlet type as Wall

Inlet
{
    type wall;
    [...]
}

Is this in general the right approach for the problem? Any tips are greatly appreciated

[mikeR]

so I think I solved my problem. In the end it was a problem with the mesh, can't really tell what it was but using netgen and converting it instead of using blockMesh solved everything