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Old   March 20, 2015, 03:21
Default Centrifugal Pump
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Hi there

I am simulating flow in a centrifugal pump using MRF in fluent. But I am getting almost constant or rather increasing total head with increase in flow rate at constant RPM. However with increase in speed the total head increases i.e. I am getting a almost constant value at a particular speed irrespective of the flow rate.
I have tried all the BC combinations, I can think off. I have tried
- mass flow inlet and pressure outlet
- mass flow inlet and outflow
- pressure inlet ad pressure outlet

But the results are coming the same.

Can anyone shed some light on this problem.

Thanks a lot in advance.
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Old   March 31, 2016, 06:17
Default Centrifugal pump
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I have not used fluent as of now but have some good experience in CFX for centrifugal pump simulation
check below parameters.

Boundary condition:
Inlet : Total Pressure (Atmospheric)
Outlet : Mass flow rate (kg/sec)

Rotating domain ( Impeller fluid region)
Stationary domain ( Casing)

Rotating to stationary with GGI connection with Frozen rotor interface

Check the direction of rotation and rotational axis of impeller.

These data may help u to cross check

thanks with Regards,
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