[jet_engine]

Hi all,

I am using buoyantBoussinesqPimpleFoam to solve a simple case with a square cylinder but although the velocity contours seem to be OK (Karman vortex street forming past the square cylinder, the pressure contours neither look symmetrical nor right.

I am attaching the important bits of the initial conditions set for U and p_rgh:

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

internalField uniform (19.68 0. 0.);


boundaryField
{
        outlet
        {
                type inletOutlet;
                inletValue   uniform (19.68 0. 0.);
                value        uniform (19.68 0. 0.);
        }

        upperLower
        {
                type symmetry;
        }

        inlet
        {
                type fixedValue;
                value    uniform (19.68 0. 0.);
        }

        symPlane
        {
                type symmetry;
        }

        cylinder
        {
                type fixedValue;
                value    uniform (0. 0. 0.);
        }
}

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

internalField uniform 0.;


boundaryField
{
        outlet
        {
                type            fixedValue;
                value           uniform 0.;
        }

        upperLower
        {
                type symmetry;
        }

        inlet
        {
                type zeroGradient;
        }

        symPlane
        {
                type symmetry;
        }

        cylinder
        {
                type zeroGradient;
        }

}

I'm also setting the kinematic viscosity to nu = 0.000656 m^2/s and since the square cylinder's side is 0.01 m long and u_inf = 19.68 m/s, Re = 300.

I tried different mesh densities (some of them quite fine) and all of them seem to behave in the same way, there's a spot over the square cylinder or below it where the pressure contours behave in a strange manner.

What am I doing wrong? Are the Boundary Conditions OK? Could it be the mesh? I'm a bit lost.

(I'm using this solver as I want to do a slip study, but in this case there was no slip and yet the results look this strange).

Thank you very much in advance.