| McCharles |
June 21, 2016 10:17 |
Density Modelling Problems in Compressible Case
Hi Foamers,
I am trying to simulate a compressible case with rhoPimpleFoam and rhoSimpleFoam. The problem is that the density isn't calculated correctly as it is almost constant trough the entire domain except for the INLET and the 2 OUTLETS, where I configured a specific density as I am using flowRateInletVelocity (mass flow) as Inlet/outlet BC. There should be strong density variations in certain areas of the Model, e.g. the flow is accelerated through a nozzle.
There is probably something wrong with my BCs. I would be very thankful if someone could take a look at my settings below.
Let me know if you need more specific informations.
Cheers!
Charles
U
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.3.1 |
| \\ / 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
{
PLENUM
{
type fixedValue;
value uniform (0 0 0);
}
ROTOR
{
type rotatingWallVelocity;
origin (0 0 0);
axis (1 0 0);
omega constant 838;
value uniform (0 0 0);
}
STATOR
{
type fixedValue;
value uniform (0 0 0);
}
OUTLET_LABY
{
type flowRateInletVelocity;
massFlowRate constant -0.00031042;
rhoInlet 2.776162;
}
INLET
{
type flowRateInletVelocity;
massFlowRate constant 0.002989;
rhoInlet 3.09;
value uniform (0 0 0);
}
OUTLET
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
CUT
{
type slip;
}
SPALT_PERIODIC_1
{
type cyclicAMI;
}
SPALT_PERIODIC_2
{
type cyclicAMI;
}
PLENUM_PERIODIC_1
{
type cyclicAMI;
}
PLENUM_PERIODIC_2
{
type cyclicAMI;
}
}
// ************************************************************************* //
p
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.3.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [1 -1 -2 0 0 0 0];
internalField uniform 300000;
boundaryField
{
PLENUM
{
type zeroGradient;
}
ROTOR
{
type zeroGradient;
}
STATOR
{
type zeroGradient;
}
OUTLET_LABY
{
type zeroGradient;
}
INLET
{
type zeroGradient;
}
OUTLET
{
type fixedValue;
value uniform 250304;
}
CUT
{
type zeroGradient;
}
SPALT_PERIODIC_1
{
type cyclicAMI;
}
SPALT_PERIODIC_2
{
type cyclicAMI;
}
PLENUM_PERIODIC_1
{
type cyclicAMI;
}
PLENUM_PERIODIC_2
{
type cyclicAMI;
}
}
// ************************************************************************* //
T
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.3.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object T;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 0 0 1 0 0 0];
internalField uniform 390;
boundaryField
{
PLENUM
{
type zeroGradient;
}
ROTOR
{
type zeroGradient;
}
STATOR
{
type fixedValue;
value uniform 389;
}
OUTLET_LABY
{
type inletOutlet;
inletValue uniform 369.989;
value uniform 369.989;
}
INLET
{
type fixedValue;
value uniform 400;
}
OUTLET
{
type inletOutlet;
inletValue uniform 390;
value uniform 390;
}
CUT
{
type zeroGradient;
}
SPALT_PERIODIC_1
{
type cyclicAMI;
}
SPALT_PERIODIC_2
{
type cyclicAMI;
}
PLENUM_PERIODIC_1
{
type cyclicAMI;
}
PLENUM_PERIODIC_2
{
type cyclicAMI;
}
}
// ************************************************************************* //
thermoPhysicalProperties
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.3.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "constant";
object thermophysicalProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
thermoType
{
type hePsiThermo;
mixture pureMixture;
transport sutherland;
thermo hConst;
equationOfState perfectGas;
specie specie;
energy sensibleInternalEnergy;
}
mixture
{
specie
{
nMoles 1; //no combustion = 1
molWeight 28.9; // für trockene Luft in g/mol
}
thermodynamics
{
Cp 1007;
Hf 2.544e+06;
}
transport
{
As 1.4584e-06;
Ts 110.33;
}
}
// ************************************************************************* //
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