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How can I get stedaystate solution from pisoFoam?

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Old   December 8, 2015, 05:31
Default How can I get stedaystate solution from pisoFoam?
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Hi, everyone.

I have a question about pisoFoam.

I know for steadystate, simpleFoam is adequate but what if I wanna find steady state solution using pisoFoam?

Currently, I'm working on MHD solver. I found some code on the internet but it is based on PISO Foam.

I set steadyState at fvScheme but it only made errors.

Few steps and stopped.

So, I though it is maybe because of PISO algorithms. So, I checked pisoFoam at Steady state and it showed same error.

How can I get stedaystate solution from pisoFoam?
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Old   December 8, 2015, 08:37
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Ferdinand Pfender
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pisoFoam is not able to give you a steady state solution.
only if your problem itself is a steady state problem, then it should be possible.

What you maybe lookin for is averaging a value over the whole domain (fieldAverage) via functionObjects-Library.
But beware, unsteady simulation and averaging is much˛ more time consuming then using a steady-state solver!

This is how it should look like in your controlDict for mean and prime2mean of U and p
Quote:
functions
{
fieldAverage1
{
type fieldAverage;
functionObjectLibs ( "libfieldFunctionObjects.so" );
enabled true;
outputControl outputTime;

fields
(
U
{
mean on;
prime2Mean on;
base time;
}

p
{
mean on;
prime2Mean on;
base time;
}
);
}
}
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