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.

What Does the Ukrainian Fluid Flow Term “Hydro Udar” Mean?

In 2018 I attended an ASME conference where I met Igor and his son Andrii. They were the first and only Ukranians I have ever met. Both were very likeable and smart. When Russia attacked Ukraine last month I thought of them and their safety. At a conference dinner one night I was sitting next to Igor and asked him a question I often do when I meet ...

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Know Your Surge Codes and Use AFT Impulse: ASME B31.4

 Unnecessary Background Codes and standards are not sexy topics, nor are they liked by the rebellious at heart. Whether you love or hate them they are a part of the world and aim to make it a safer place. One of the largest organizations to compose standards is the American Society of Mechanical Engineers (ASME). They have been around sin...

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Find Help Faster with the Documentation Portal

AFT strives to make our interface intuitive and user-friendly, but we know that pipe flow modeling can be complex. That's why the AFT team have worked to put together the AFT documentation portal, a new centralized place to find all of our help resources for AFT Fathom, AFT Arrow, AFT Impulse, and AFT xStream. Here's a quick summary of what you can...

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For Geeks Only – Solving Transient Compressible Flow Equations

Be forewarned that today I am going into full on geek mode and talk about equations for transient compressible flow. These equations are in the form of hyperbolic partial differential equations (PDEs'). If that did not scare you away yet, then you may be as much of a geek as I am! With some fancy mathematics, three PDE's can be converted into six o...

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To Affinity and Beyond!

Pump manufacturers often supply performance curves at a specified speed. While this is useful when the pump only runs at that rated speed, performance changes when the pump has a Variable Frequency Drive (VFD). A VFD changes the shaft speed, which, in turn, changes the performance curves. If the manufacturer only supplied a curve at a sin...

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How does AFT Impulse model transient cavitation

The term transient cavitation is thrown around frequently when talking about the effects that transient events have on piping systems. It is widely and correctly understood to be something that can be harmful to pipes and pipe system components, but how to predict and calculate transient cavitation is not something that is as equally understood. In...

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Is there steam on your (Microsoft) Windows? How ASME Steam Tables came to be.

In the modern world there are many things we take for granted – especially in first-world countries. Among them are the reliable availability of water and electricity. To our homes. To our workplaces. Just about everywhere. Engineers also take things for granted. One of those is reliable data on the properties of steam and water. But it was not alw...

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