Hope you are doing well. I have run into a rather strange problem with one of my simulations. In a nutshell, it is flow through a valve with inlet mass flow, no slip walls and exit at gauge as the B.C.´s. The link is here:[https://www.simscale.com/projects/ashroff/choke_valve_3_inch/]
As you can see from the results for Compressible_2_March_27 Run_2, the values for pressure and velocity is completely incoherent with what i am expecting. (Theoretically at these conditions, I should record a pressure drop of not more than 120 Psi). Having said that, I tried to run a very simplified model with the same conditions and I got a very decent result. Link here: https://www.simscale.com/projects/ashroff/trial_l_bend/
I have little idea why this is happening. I mean, with all conditions being the same, how can just a change in geometry produce such erroneous results? Does anyone know what is exactly going on here? Awaiting your reply. Thanks!