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.

Know Your Pump & System Curves – Part 2B

In this blog, we dive further into pump and system curves for complex systems.  The examples include demonstrating system curves changing over time and when multiple system curves exist for a single system with multiple pumps in different locations of the system.  Let us re-visit the multi-branched system example from the previo...

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Not a Leak! Modeling Multi-stage Pumps with Discharge Flow Between Stages

 AFT Fathom has long included the ability to model multi-stage pumps by representing them with an overall effective pump curve. New in AFT Fathom 10 is the ability to model "Interstage Bleed" or "Takeoff Flow" in these multi-stage pumps.

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It’s a Pump Properties Party!

Everyone loves to celebrate. Here at AFT, we are celebrating the release of AFT Fathom 10. One of the great things about AFT Fathom 10 is that the new and improved Pump Properties window makes specifying pumps faster and easier than ever. This blog will provide an overview of the features that have been added or changed within the Pump Propert...

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What Does “Head (HGL)” Mean for Submerged Pumps and Exit Pressures?

In AFT Fathom and AFT Impulse, it is possible to model a submerged pump where a short and possibly frictionless suction pipe for the pump’s inlet does not need to be modeled.  When modeling a submerged pump, there are two options available for specifying the system inlet boundary condition at the pump suction.  As shown in Figure 1 below, the Submerged Pump’s Suction Pressure can either be specified as “Head (HGL)” or “Pressure”.   Modeling a submerged pump is not the only time where the “Head (HGL)” or “Pressure” choices will arise.  If an Exit Valve (i.e., a valve that discharges...

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