[juho]

Hello

First post on the message board. I've only begun looking into OpenFOAM a few weeks ago.

I'm trying to simulate a intake plenum of a car and I'm using rhoTurbFoam.

My problem is how to define the time dependant boundary conditions for the outlets to each cylinder.

In a test case I currently have defined them as:

===============================================

0/U:


out1
{
type inletOutlet;
inletValue uniform (0 0 0);
value uniform (0 0 0);
}
inlet
{
type pressureInletOutletVelocity;
phi phi;
value uniform (0 0 0);
}

0/p:

out1
{
type timeVaryingUniformFixedValue;
timeDataFileName ".../out1p.dat";
value uniform 100000;
}
inlet
{
type totalPressure;
U U;
phi phi;
rho none;
psi none;
gamma 1;
p0 uniform 100000;
value uniform 100000;
}
===============================================

The out1.dat has a period of constant inlet pressure followed by a sine curve of a lower pressure.

This setup gives something resembling the boundary conditions I want but it's not really correct. I would like to change the type of the boundary depending on time:

===============================================
T1:
===============================================

p:

out1
{
type timeVaryingUniformFixedValue;
timeDataFileName ".../out1p.dat";
value uniform 100000;
}

U:
out1
{
type zeroGradient;
}

===============================================
T2:
===============================================

p:

out1
{
type zeroGradient
}

U:
out1
{
type fixedValue;
value uniform (0 0 0);
}

===============================================

Is there an easy way to accomplish this? Or is there a better way to approach the issue all together?

I would greatly appreciate any help or guidance!

Juho