I'm running an anaysis to simulate water flowing into a large tank (25 ft dia x 24 ft tall) at 3100 gpm through two different pipes, 12" and 24". There's a centrifugal pump that removes 3100 gpm. The reason I'm runing the analysis is to calculate the forces on the tank wall due to the flow/velocity. The model consists of stacked wedges (4 vertical levels of 18 wedges for a total of 72 sections). However, I'm getting high forces on the walls (severl thousands of punds) that are not due to hydrostatic force (they are constant over the four vertically stacked regions) that only vary a few punds between regions with no velocity at the wall and regions with 50 in/sec. What's going on? Where are the high force values coming from if it's not hydrostatic and not related to velocity?
Hi:
Without looking at your model, it is difficult to know what the underlying issue might be.
In any case, I would simply the setup by removing the pump and assign flow rates based on your estimates at the inlets of the two pipes with a zero gage pressure at the tank exit and then re-run the analysis.
Use the advection scheme Adv5.
Hope this helps.