[Julian121]

I have created isovolumes of the maximum momentum residuals in cfd post. The red color corresponds to the maximum momentum residuals. The blue color shows the location of elements with face angle less than 18 degress. The locations of high residuals are close to the prism layers I have created for the vanes inside the casing treatment and the left wall.
I am smiulating several configurations of casing treatments and I need to obtain pressure rise developed for each configuration. However, the pressure ratio does not converge.
I have created vector plots on two planes where the maximum residuals are and it seems that flow seperation occurs in these locations.
Is the problem of convergence mesh related or it is due to flow seperation or reattachment that take place in these locations?
Is there any way to converge the pressure rise?
I have tried transient simulations but they take too long to converge and cannot be used for many configurations.
This operating point is close to the stall point.