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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.
Applied Flow Technology

Using Three Way Valves in AFT Fathom

AFT Fathom provides a Three Way Valve which increases the Engineer’s capability to model system control. The Three Way Valve Properties Window shows the three connecting pipes in drop-down lists, which allows users to specify which pipe is the combined flow pipe, and which two are the split flow pipes. By entering the loss profile through each flow path, and then by selecting the actual percent open, Fathom will calculate the actual loss values for each flow path. Using the Three Way Valve in conjunction with the Goal Seek & Control module (GSC) increases the Engineer’s capability to model I&C logic...
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Trey Walters

World Languages and Waterhammer

The demand for our AFT Impulse waterhammer modeling software and associated training seminars has been growing steeply in recent years. I frequently travel internationally to teach  seminars on waterhammer. When I do I make it a point to find out what the engineer's local language calls waterhammer.

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Recent comment in this post
Guest — Eddie Bosman
The Afrikaans word for waterhammer is "waterslag" (Afrikaans is one of the many languages in South Africa).
Wednesday, 28 November 2012 15:28
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Ben Keiser

Curious About Modeling Relief Valves?

Relief valves can be modeled in four different configurations with AFT products and they are shown in the figure below.  The required inputs for modeling a relief valve are the valve type, cracking pressure, valve loss model, and the exit pressure in the case of relieving to the atmosphere.    There are three types of relief models available:  Internal (Cases 1 & 1a), Relief Valve at Exit (Case 2), and Inline Exit (Case 3).  In cases 1 and 1a, the relief valve is relieving into vent piping downstream of the valve.  Note that there is initially no flow in the pipe downstream...
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Recent Comments
Guest — r.sivasubramonian
pl.explain the following 1.how to decide the pressure at the outlet of the relief valve? in all the 4 cases? 2.how to find the rea... Read More
Friday, 30 November 2012 03:54
Guest — Ben Keiser
Depending on the particular case, you will define the cracking pressure difference as described in the four cases. The software w... Read More
Monday, 31 December 2012 11:45
Guest — Relief Valve Discharge
I have enjoyed reading this wonderful article about Modeling Relief Valves issues. Entire discussion is more helpful and all the t... Read More
Tuesday, 15 May 2018 05:39
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Trey Walters

Who said pipe flow can’t be fun? Disney’s World of Color water spectacular

In 2010 the Walt Disney Company created a mind-boggling new night time show called World of Color at the Disney California Adventure theme park which is part of Disneyland Resort in Anaheim, California. For anyone who ever doubted that flow can be fun, you need to see this show!

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John Rockey

Annotation Images

One of the many new features in Fathom 8 is the ability to show images in the annotation box. This simple feature will allow the engineer to easily and clearly communicate a vast array of information through the Workspace and Visual Report.   To add an image to the Workspace or Visual Report, as seen above, select the Annotation tool from the toolbox. Then select the “Line/Arrow/Image” tab and specify the file path to your image. Once the image is selected, click OK. The image box shown on the workspace can be easily moved and resized.
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Trey Walters

AFT Fathom 8 and the Future of AFT

AFT Fathom 8 began shipping last week. And we are excited. The release of AFT Fathom 8 coincided with the unveiling of our new logo, new website and newly branded material. It is not an understatement to say this represents a new era for AFT.

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Applied Flow Technology

Case Study: DuPont Saves Millions of Dollars With AFT Fathom on Slurry System Operational Problem

DuPont experienced severe operational problems on a new product line that put at risk a multimillion dollar investment. The system involved pumping of a non-Newtonian fluid which behaved as a Power Law fluid. AFT Fathom’s unique capability to model valves and fittings was critical to identifying the cause of the problem and guiding the solution. DuPont engineer Dan Wood teamed with AFT President Trey Walters to present a technical paper this week at the 28th International Pump User Symposium in Houston, Texas. There they presented the problem and resolution which involved a new valve and fitting calculation method developed by AFT...
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