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-   -   different flow rate, but same pressure gen. why? (http://www.cfd-online.com/Forums/cfx/22276-different-flow-rate-but-same-pressure-gen-why.html)

Richard March 9, 2006 09:57

different flow rate, but same pressure gen. why?
 
First i am stimulating a pump. Therefore i use extrude to create a enclose area around the pump an cut the mat'l out, leaving behind a part with hole that take the shape of the pump inside

Then i spilt up the pump into stationary and rotating part, and use frozen rotor for the interface for them.I also create 2 cylindrical area, one as inlet flow area, another as outlet and use frozen rotor for their interface with the pump domain. I use mass flow rate for inlet and static pressure(refeence 0) for outlet.

I run this simulation for a different flow rate but get almost the same static pressure gen across the pump. How come? Inaddition there is high velocity found in at the interface.


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