Pressure/Pressure Drop Gradient Visualization

I’m trying to simulate hydrodynamic losses from flowing CO2 over a fixed bed(VOF 0.5(g) 05(s)) and the results of my sim show constant static pressure across the entire column. I’d expect a decrease in pressure, even without the fixed bed, but I’m not seeing and indication of a pressure gradient.

I have left and right walls set to no-slip, bottom set to mass inflow, top set to mass outflow. Am I missing any underlying model/VTK toggles?

File: Porous-Test.mfx (21.8 KB)

Thank you

I’ve figured it out. Didn’t set reference pressure