[erfan9517]

Hi everyone
I'm new in OF7 and I tried to simulate compressible flow in a pipe with porous media using rhoPimpleFoam solver, but the calculated pressure drop form OF has major differences with Ergun equation.
I would appreciate it if anyone could help. Thank you in advance.

The pipe is 2 meters long and 0.05 meters in diameter




pvOptions file:


porosity1
{
type explicitPorositySource;

explicitPorositySourceCoeffs
{
selectionMode cellZone;
cellZone porosity;
active yes;
type DarcyForchheimer;
F 4148.1;
D 11111111.0;

d ($D $D $D);
f ($F $F $F);

coordinateSystem

{
type cartesian;
origin (0 0 0);
//rotation none;
coordinateRotation
{
type axesRotation;
e1 (0 1 0);
e2 (1 0 0);
}
}
}
}




thermophysicalProperties file :


thermoType
{
type hePsiThermo;
mixture pureMixture;
transport const;
thermo hConst;
equationOfState perfectGas;
specie specie;
energy sensibleEnthalpy;
}

mixture
{
specie
{
molWeight 28.9;
}
thermodynamics
{
Cp 1007;
Hf 0;
}
transport
{
mu 1.84e-05;
Pr 0.7;
}
}