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 3

SystemImages

In the final "Know Your Pump & System Curves" blog series, I am going to discuss the complexities behind pump vs. system curves for systems with pumps in series and parallel configurations. Multiple pumps in series configurations are relatively straight-forward and will be discussed briefly. Operating pumps in parallel configuration involve a f...

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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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Modeling Fans, Blowers and Compressors - Oh My!

For gas systems flow is driven either by a pressure difference, or by a turbomachine. AFT Arrow allows users to model turbomachines such as fans, blowers and compressors. For this blog we'll talk about what differentiates these three options, and how to model them using AFT Arrow.    Definitions and Types Fans, blowers and compressors all...

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That Valve’s Got Character – Applying Pre-defined Characteristic Curves

Valve Characteristics

Valves are often oversimplified during modeling. Understandably, defining a valve with its range of Cv at various open percentages requires much more information than an engineer may have during the initial design phase. However, just like handbook data, heuristics, and correlations, valves too can be reasonably approximated using their common char...

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Back to the Basics: Calculating and Defining Head

While thinking in terms of pressure is often intuitive for engineers, thinking in terms of head can be more challenging. You may be surprised by the number of cases and questions that come to the support team here at AFT about the basic definition of head, and how it relates to hydraulic modeling. Let's get back to the basics with how head is defin...

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AFT Responds to 2020 Customer Survey Feedback

In early 2020, AFT users gave us valuable feedback via our annual survey. We read and absorbed requests for additional capabilities our software doesn't yet have, as well as capabilities the software already has and users may not be aware of. Customers praised us for the prompt high-level of support our team provides, and they let us...

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Q&A: Calculating Transient Forces for Pipe Stress Analysis

In June 2020, AFT's Reinaldo Pinto presented the webinar Calculating Transient Forces for Pipe Stress Analysis. The webinar focused on generating unbalanced forces due to surge in AFT Impulse and exporting them to CAESAR-II. During the webinar, 28 questions were asked. Below are the responses.  Download the presentation: www.aft.com/...

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