[doubtsincfd]

Hi,

I am trying to solve a simple problem of compressible flow through a 2D rectangular duct with a porous zone in between.

The domain is described in the attached pdf

I ran 150 iterations and I am getting negative absolute pressure in the domain, which is non-physical. I am monitoring pressure at inlet. The 0 constant and system folders are in the attached tar file.

run the script "./runIt". Observe the values of inlet pressure in log file.

How can absolute pressure go negative at all? What is going wrong in such a simple problem?

Thank you!