| Vinzmann |
April 28, 2023 09:35 |
reactingTwoPhaseEulerFoam pressure rising into oblivion
Hey foamers,
I am having a problem with reactingTwoPhaseEulerFoam.
I want to run a pressure driven flow and for that I modified the wallBoiling tutorial. My problem here is that the pressure rises and rises in the simulation until openfoam throws an error.
My p file looks like this:
Code:
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [1 -1 -2 0 0 0 0];
internalField uniform 1e5;
boundaryField
{
inlet
{
/*
type uniformTotalPressure;
value uniform 2e5;
p0 table
(
(0 1.01e5)
(1 1.1e5)
(1.01 1.5e5)
(1.1 2e5)
(2 2e5));
U U.gas;
psi thermo:psi.gas;
gamma 1;
*/
type fixedValue;
value 2e5;
}
outlet
{
type calculated;
value $internalField;
inletValue $internalField;
}
wall1
{
type zeroGradient;
value uniform 100000;
}
wall2
{
type zeroGradient;
value uniform 100000;
}
defaultFaces
{
type empty;
}
}
With p_rgh like this:
Code:
boundaryField
{
inlet
{
/*
type uniformTotalPressure;
value uniform 2e5;
p0 table
(
(0 1.01e5)
(1 1.1e5)
(1.01 1.5e5)
(1.1 2e5)
(2 2e5));;
gamma 1;
U U.gas;
psi thermo:psi.gas;
*/
type fixedValue;
value 2e5;
}
outlet
{
type prghPressure;
p $internalField;
value $internalField;
inletValue $internalField;
}
wall1
{
type zeroGradient;
}
wall2
{
type zeroGradient;
}
defaultFaces
{
type empty;
}
}
So when the simulation runs, I obtain maximum pressures in my domain which exceed the maximum total inlet pressure. How can I fix this?
Code:
fieldMinMax inlet_minmax write:
min(T.liquid) = 259.992008 in cell 1885 at location (0.0175 1.98666667 0.095) on processor 3
max(T.liquid) = 264.538203 in cell 1707 at location (0.0475 0.0666666667 0.095) on processor 0
min(p_rgh) = 60708.731 in cell 1684 at location (0.0325 0.0133333333 0.095) on processor 0
max(p_rgh) = 319567.437 in cell 3 at location (0.0175 0.0133333333 0.005) on processor 0
min(T.gas) = 246 in cell 177 at location (0.0025 2 0.005) on processor 3
max(T.gas) = 264.167583 in cell 1707 at location (0.0475 0.0666666667 0.095) on processor 0
min(p) = 60716.7122 in cell 1684 at location (0.0325 0.0133333333 0.095) on processor 0
max(p) = 319573.132 in cell 3 at location (0.0175 0.0133333333 0.005) on processor 0
min(mag(U.gas)) = 0 in cell 0 at location (0 0.0133333333 0.005) on processor 0
max(mag(U.gas)) = 51.9675555 in cell 3 at location (0.0175 0 0.005) on processor 0
min(mag(U.liquid)) = 0 in cell 0 at location (0 0.0133333333 0.005) on processor 0
max(mag(U.liquid)) = 51.9675555 in cell 3 at location (0.0175 0 0.005) on processor 0
This is after only a few time steps. Also my outlet does't let any fluid out, it just lets fluid in, which it should not do, since it is the same pressure as the internal field and has pressureInletOutletVelocity as a boundary condition.
Code:
average(inlet) of phi.gas = -5.61329548e-06
average(inlet) of phi.liquid = -5.61329548e-06
average(outlet) of phi.gas = -1.11589869e-07
average(outlet) of phi.liquid = -0.000266711356
It would be really great if you guys could help.
Thanks,
Vinz |
