[meng9019]

Hi, all
I am simulating a fluid flow in a periodic cylinder pipe using OpenFOAM.

The 0/U and 0/p files are set as following:

0/U
inlet
{
type cyclic;
value uniform (0 0 0);
}
outlet
{
type cyclic;
value uniform (0 0 0);
}
wall
{
type fixedValue;
value uniform (0 0 0);
}

0/p
inlet
{
type fan;
patchType cyclic;
f List 1 (-0.0128);
value uniform 0;
}
outlet
{
type fan;
patchType cyclic;
f List 1 (-0.0128);
value uniform 0;
}
wall
{
type zeroGradient;
}

It works well.
But when I run the simulation in parallel, the pressure field and the velocity field become zero in the first time step.

Do you have any idea for the reason? Thanks in advance.

[ChristianR1988]

are you running the cyclic-patches on the same processor?i think you can fix the by editing the decomposition-file.

for example:

method simple;

preservePatches
(
LEFT
RIGHT
);

[meng9019]

Originally Posted by ChristianR1988

are you running the cyclic-patches on the same processor?i think you can fix the by editing the decomposition-file.

for example:

method simple;

preservePatches
(
LEFT
RIGHT
);

Hello, Christian
It works. Thank you very much.

[kk415]

Hello


I am working with cyclic boundary condition as well. The test case I am solving is a static bubble in a quiescent flow. It is a 2D case with all sides periodic i.e. left,right,top,bottom all. I am getting unphysical velocities at corners in parallel run after doing the modification as suggested Christian.
U.jpg