axial flow pump, inflow boundary

tma

Hi I use TascFlow to learning cavitation in axial flow pump which is imported blade geometry from CAD application to BladeGen and generated grid by Turbogrid. I have some problem about inflow boundary. When I focus on cavitation, I should set type of boundary as pressure but I when I set pressure to negsative value the solver stop due to error. Who does have an ides to solve this problem. How to calculate pressure at inlet of axial flow pump or estimate it from other parameter. I am looking for other guy who work on cavitatin phenomena or interresting my work for exchange data, blade profile and result. Thank everybody to reading this message. Regards