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-   -   pump prevalence at low mass flow rates (http://www.cfd-online.com/Forums/main/83704-pump-prevalence-low-mass-flow-rates.html)

Caterina January 8, 2011 17:05

pump prevalence at low mass flow rates
 
Hi everybody,
my question deals with simulation of water pumps.

I simulated a water pump at different mass flow rates as inlet condition and compared my results with experimental data. I worked with MRF model with a commercial code.
At maximum mass flow rates (water valve completely open) prevalence results agree with experimental data very well. At contrary, at lower mass flow rates prevalence is over-estimated, and error grows at diminishing of mass flow rate and at growing of rotational velocity.

Has anybody a suggestion to explain this phenomenon?

Thanks,

Caterina


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