I am trying to solve two problems.

A tank with an agitator and a hydrofoil rotating at 100 rpm.
I need to generate Power number for the shaft from this simulation.
Here I want to decide the type of simulation i.e steady state or transient, boundary conditions and mesh type. I have tried solving this problem using fluent using mrf. I need here accuracy in my task. 
A mixing equipment with an agitator. here power and liquid are getting introduced in the tan at different flowrates. This problem needs mrf with multiphase simulation. Th objective is to see the velocity distribution and particle distribution.
Kindly help me solve these two problems.