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How can I calculate the head , power, and efficiency of a pump?

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Old   March 26, 2016, 20:55
Default How can I calculate the head , power, and efficiency of a pump?
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I have carried out 4 simulations on a centrifugal pump using fluent at 4 flow rates and I want to know how can I know the value of the head,the efficiency and the eff.? Is there a direct method in fluent to know these values?
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Old   March 28, 2016, 12:07
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These are all bulk quantities that are better to calculate by hand. The problem with bulk quantities is they have too many variations to their definitions that are user specific. For example, dynamic head as one-half the density times the velocity squared sounds simple on paper until you get to a 3D problem with real temperature & pressure dependent properties. Then there are plenty of ways to compute and average dynamic head depending on whether you average the local dynamic head at each cell, or calculate it from average density and bulk velocity.

Just get the properties you need from Fluent and then calculate them externally in excel or whatever. If it is only 4 cases then is the fastest approach. If you need to automate it, you will have to get creative with reports, udf's, or custom field functions.
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Old   March 28, 2016, 12:14
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Thank you sir.
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