hi I want to model a water pump for auto apps. using star-cd. Can tell me how i may go about this. I guess I would need a rotating mesh or rotating reference plane. Also I believe it is a steady state calc.

Any ideas, also any references on the subject will be appreciated.

Sanjay,

You can use the implicit multiple reference frame capabilities of STAR. You will need to specify a volume of fluid which is "swept" by the impeller blades of the pump. You need to model the blades using this approach. You will also need to define a local cylindrical coordinate system, with the z-axis coinciding with the axis or rotation of the pump. The rotational speed of the pump in (rpm) also needs to be specified.

The "swept" volume will be solved in a rotating frame. The inlet scroll and exit volumes will be solved in a stationary frame. The calculation is steady state.

Have Fun!

Ron