I have a tube ( smaller dia) in a system through which vacuum pump is pulling the air . Also air is being blown from outer nozzle (bigger dia). I have specified the side to which vacuum pump is attched as static pressure BC. My model ends at the pipe. Is that BC right as immediately after the boundary you have air which is at atmospheric pressure ?
why not make your vaccuum pump and outlet volume flow rate? it is not ideal as outlet volume flow rates are not recommended by the developers but should make your BCs more straight forward.
if you want to go with a pressure, you need to use the BC condition that you know. if you have static, apply static. if you have total, put in total. and remember to generate a flow rate, there needs to be a difference between atm and the outlet. and also that solidworks works in absolute pressure, not gauge.