blood pump
 

i am simulating flow in a centrifugal blood pump. while estimating the mass flow rate through the washout holes(washout holes are holes near the axis of the pump intended to prevent stagnation of blood near the axis) i am getting a value which is twice the expected value). I got this using the mass flow tool in the function calculator. Any ideas on such a deviation....I am using a rotational frame of reference for the impeller and a static frame of reference for the sorrounding medium with a frozen rotor interface

ranjith