[shangzung]

Hello!

I am trying to simulate water entering a 3D tunnel through a hole on the ceiling. Somehow the simulation crashes after a couple of timesteps and i assume the error lies in the boundary conditions. I am working with interFoam. Here are the BC's:

alpha1:

tunnelWalls
{
type zeroGradient;
}

tunnelHole
{
type fixedValue;
value uniform 0.7;
}

tunnelPortals
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}

defaultFaces
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}


p:

tunnelWalls
{
type buoyantPressure;
value uniform 0;
}

tunnelHole
{
type totalPressure;
p0 uniform 0;
U U;
phi phi;
rho rho;
psi none;
gamma 1;
value uniform 0;
}

tunnelPortals
{
type totalPressure;
p0 uniform 0;
U U;
phi phi;
rho rho;
psi none;
gamma 1;
value uniform 0;
}

defaultFaces
{
type totalPressure;
p0 uniform 0;
U U;
phi phi;
rho rho;
psi none;
gamma 1;
value uniform 0;
}

U:

tunnelWalls
{
type fixedValue;
value uniform (0 0 0);
}
tunnelHole
{
type fixedValue;
value uniform (0 0 0);
}
tunnelPortals
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
defaultFaces
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}

Is there an error that could cause the instability?