[ashokmoravaneni]

Good evening everyone,

I have an Assignment to simulate a sliding pipe test. I would like to briefly explain what I am supposed to do.

I have a cylindrical Geometry of 0.126m dia and 0.5m height. Patches are top-atmosphere or can also be considered wall, bottom-wall, sides-movingwall with velocity of 0.667m/s.

This case was done in simpleFOAM and the Results are perfectly accepted by my Professor. Now I was asked to implement this in interFoam where Im facing problem.
I have inputted the same Boundary conditions as i inputted in simplefoam for interfoam too but getting following error.

continuity error cannot be removed by adjusting the outflow. Run potentialfoam to initialize the outflow.

Bc's are as below,

SimpleFOAM case:
P

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

internalField uniform 0;

boundaryField
{
wall
{
type zeroGradient;
}

bottom
{
type zeroGradient;
}
top
{
type zeroGradient;

//If outflow
// type fixedValue;
// value $internalField;


}
}

U:
dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
wall
{
type fixedValue;
value uniform (0 -0.6679 0);
}
bottom
{
type fixedValue;
value uniform (0 0 0);
}
top
{
type fixedValue;
value uniform (0 0 0);
}

}

InterFoam case:
P_rgh

dimensions [1 -1 -2 0 0 0 0];

internalField uniform 0;

boundaryField
{
movingWall
{
type zeroGradient;
// p0 uniform 0;
}

atmosphere
{
type zeroGradient;

}

bottomWall
{
type zeroGradient;
}


}

U:

dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
movingWall
{
type fixedValue;
value uniform (0 -0.6679 0);
}

atmosphere
{
type fixedValue;
value uniform (0 0 0);
}

bottomWall
{
type fixedValue;
value uniform (0 0 0);
}

}


Could there be any other Reasons for such error.??
Will be looking forward for any kind of suggestions.Thank you