[_Revolution_]

Hello together,

I have a couple of questions about the definition of the initial and boundary conditions for my problem. Basically I want to simulate a suction for a room. At the inlet_1 and outlet_1 I want to define a fix velocity or a volumetric flow. In order to be able to equalize the volume in the room, air should flow in again through the other two inlets (inlet_2 and inlet_3 > free convection).

I use OpenFoam-V8 and I want to solve the problem laminar with pimpleFoam. My first attempt for the definition looks like this:

/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 8
\\/ 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
{
inlet_1
{
type fixedValue;
value uniform (0 0.1 0);
}
inlet_2
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
inlet_3
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
outlet_1
{
type fixedValue;
value uniform (-15.0 0 0);
}
suction
{
type noSlip;
}
walls
{
type noSlip;
}
}


/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 8
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

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

internalField uniform 0;

boundaryField
{
inlet_1
{
type zeroGradient;
}
inlet_2
{
type uniformTotalPressure;
p0 uniform -1;
}
inlet_3
{
type uniformTotalPressure;
p0 uniform -1;
}
outlet_1
{
type fixedValue;
value uniform 0;
}
suction
{
type zeroGradient;
}
walls
{
type zeroGradient;
}
}


Can somebody help me at the definition of the initial and boundary conditions? What have I to change in the conditions so that I can simulate the problem or run the simulation correctly?


Thanks in advance for your help.