[komodo]

Dear All,

I write to report this strange behavior I noticed while doing some tests.

The case (attached) is quite simple.
It's a rectangular duct. One inlet, one outlet.
Two of the non-opposing duct sides are symmetries, the other two are walls.
Steady state, laminar flow.

When using the coupled (PBiCCCG) solver, the velocity profile of Uz component along one direction (X, the wider one in the proposed case) doesn't look right to me.
It seems almost as if one symmetry behaved like a wall, with velocity going towards zero...

This behavior doesn't happen when using the standard (aka "segregated") solver.

I've seen this issue running on OpenSUSE 15.5 and OF versions:
* 11 and 12 (Foundation)
* 2406 and 2412 (Esi)

Please see attached pdf for better clarity on domain and results.

Maybe I am just using this solver in the wrong way, but I hope someone can shed some light on this issue.

Thanks,

To run the cases:
Just unpack and run "./Allrun" script in linux environment.
For postprocessing just use last line in REAME.txt.