Expert ForumsMixing

Topic: Re: How do you calculate the power required for helical impeller mixer?

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You left out one essential piece of information needed to calculate the power, and that is the rotational speed.  So here are a the power requirements for a few appropriate speeds:     60 rpm    1,400 W    50 rpm    936 W    40 rpm    599 W    30 rpm    337 W The viscous power number for the impeller is 312.  Viscous power number is Power divided by all the following (Viscosity times Rotational Speed squared times Impeller Diameter cubed).  Of course the units of the variables must be consistent to obtain a dimensionless relationship.
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