Hi Karthik!
Thanks for the reply. The video is quite relevant and yeah we did do something similar to what is done here. Essentially in this tutorial, the outlet gauge pressure is set equal to the freestream static pressure (i.e., 10400 Pa), whereas I had earlier set it equal to 0 Pa. Setting it to freestream pressure solves the issue but I wanted to know how does one decide the exit gauge pressure for such problems?
For instance, if I set the outlet pressure equal to 5000 Pa, the exit pressure at that region becomes equal to ~5000Pa.
Regards Shuvayan