pimpleFOAM/icoFOAM,Problem of convergence while simulating oscillatory flow condition
 

Hi all,

I have been trying to simulate a laminar oscillatory flow condition (eg breathing,blood pumping) using icoFOAM/pimpleFOAM.However the solution is not converging for either of the two solvers. The mesh has been used before for a similar simulation therefore the mesh does not seem to be the problem.Your valuable inputs for this problem is greatly appreciated. Given are the boundary conditions for the velocity,pressure and solution controls.
Also nNonOrthogonalCorrectors=2

Boundary Conditions for velocity

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

internalField uniform (0 0 0);

boundaryField
{
WALL
{
type noSlip;
}

INLET
{
type uniformFixedValue;
uniformValue
{
type sine;
frequency 0.2;
amplitude .5;
scale (0 0 1);
level (0 0 0);
}
}

OUTLETS
{
type zeroGradient;
}

}
Boundary Conditions for Pressure

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

internalField uniform 0;

boundaryField
{
WALL
{
type fixedValue;
value uniform .01;
}

INLET
{
type zeroGradient;
}

OUTLETS
{
type fixedValue;
value uniform 0;
}

}

Control Dict

application icoFoam;

startFrom latestTime;

startTime 0;

stopAt endTime;

endTime .006;

deltaT 0.0005;

writeControl timeStep;

writeInterval 20;

purgeWrite 0;

writeFormat ascii;

writePrecision 6;

writeCompression off;

timeFormat general;

timePrecision 6;

runTimeModifiable true;

try zero gradient pressure on wall

Convergence
 

Hello

I would like to ask about convergence of a simulation in foam ext 4.0
Indeed, i am running a tutorial of immersed boundary(movingcylinderInchannel), using IcoDyMIbFOAM,
I would like to ask about its convergence?
You may refer to the attached picture of residuals!
Regard!