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AFT Blog

Welcome to the Applied Flow Technology Blog where you will find the latest news and training on how to use AFT Fathom, AFT Arrow, AFT Impulse, AFT xStream and other AFT software products.
Ben Keiser

What About Viscosity Corrections?

Previously, I wrote an article that discussed how to account for density differences between a pump manufacturer's test fluid and a system fluid for pumps as well as the importance, http://www.aft.com/blog/entry/2014/12/02/reference-densities-for-pump-operation.  Both AFT Fathom and AFT Impulse can take into account these density differences very easily, thus, reducing the efforts for the user. But what about viscosity corrections?  Is it important to take this into account as well?  How is this accomplished?  Does it really make a difference? If the system fluid you are modeling has a HIGHER VISCOSITY (more resistant to flow) than the fluid the pump was tested with,...
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Recent Comments
Guest — RJ
Worthful...!!!
Friday, 12 December 2014 22:04
Guest — SB
Couple of questions: 1. The pump curve data entered, is this for water? 2. How are NPSH-R curves corrected? does the hydraulic i... Read More
Monday, 09 February 2015 22:16
Ben Keiser
Hi SB, Yes, the pump curve data entered is assumed to be based upon water. The System Fluid has a higher viscosity than water an... Read More
Thursday, 12 February 2015 11:10
  6467 Hits
  3 Comments
Ben Keiser

Reference Densities for Pump Operation

You have just received a pump curve from a manufacturer to use in modeling your piping system.  However, the pump manufacturer only tested their pump with water while your system fluid has a density that is different than water.  These differences need to be accounted for with your flow model as well.  This may sound like a bit of a daunting task up front. But there is good news!  In AFT Fathom 8 and AFT Impulse 5, there are two very helpful features that will allow you to easily account for these differences with no trouble at all! The pressure rise...
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Recent comment in this post
Guest — RJ
Quite a helpful information and an important correction feature introduced. Thanks for the Information
Friday, 12 December 2014 21:51
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  1 Comment
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