I have been calculating the power that a pump (or fan) imparts on the fluid by:
Power[W] = flow [m3/s]x Static pressure [Pa] I call it hydraulic power.

I then divide this by the pump (or fan) efficiency and the motor efficiency to get the power required to run the pump (or fan).

My problem is when I search on the internet for hydraulic or fluid power I can't find this formula. Does anyone know what it's called and a website that confirms this formula?