C N
Ansys Employee

Hello Steven,

I recommend you to try modifying the TimeScale value (In "Solver-Control" option) and check it. I am attaching a best practice tutorial file regarding pump in cfx. Please refer to these links for appropriately setting up the case. 

(60) ANSYS CFX: Design and Analysis of a Pump Impeller - Part 1 - YouTube

(60) ANSYS CFX: Design and Analysis of a Pump Impeller - Part 2 - YouTube

Hope this solves your problem.

Thanks,

Chaitanya natraj