Dynamic solutions for a fluid world™

AFT President & Founder | ASME Fellow - Trey founded AFT in 1993. He was the original developer of AFT Fathom (including the GSC and XTS modules), AFT Arrow and AFT Impulse. He was active in software development until 2011 and still works with the development team in addition to managing AFT. He has taught hundreds of training classes on AFT’s ...software products in twelve countries across every populated continent. He worked previously for General Dynamics in cryogenic rocket design and Babcock & Wilcox in steam/water equipment design. He holds a BSME (1985) and MSME (1986), both from the University of California, Santa Barbara. He is a registered Professional Engineer.   More
Trey Walters

The Cool, New Features Coming Soon in AFT Fathom 9

I like cool new features in software. And I am especially proud of those in the upcoming AFT Fathom 9. We expect this new version to be available in the next two months. Below I will touch on some of the new features I think will be of most interest to you. Graphing Let me start by talking about my favorite new feature in AFT Fathom 9. Namely, the new graphing capabilities. Here is a summary of what to expect: Multiple graphs can be displayed concurrently in various forms including stacking and tiling Graphs are persistent and automatically updated when the...
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Trey Walters

Why Are Engineers So Dissatisfied?

Engineers often think in terms of extremes in order to add perspective to a problem. So I will engage in some extreme thinking here to help understand why engineers are by and large a very dissatisfied group of people. The first extreme is to think of a person who is happy with everything around them. While the happy person may be easy to be around, such a person has little pressure to improve things because nothing seems to need improving. They are happy. The second extreme is to think of the person who is unhappy with everything around them. Such a...
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Trey Walters

Should Engineers Always Perform Waterhammer Analysis of New Pipe Systems? Part 2

Two years ago this month I wrote this blog article: "Should Engineers Always Perform Waterhammer Analysis of New Pipe Systems?" . This was a popular blog. It was written from the fluid dynamic engineer's perspective. Last month I was teaching an AFT Impulse training seminar and this same question came up during the class from an astute attendee. However, the question came more from a pipe stress engineer's perspective. And I realized that the answer to the question is not necessarily the same for a pipe stress engineer. Thus came the idea to write a Part 2 to the previous blog. A...
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Trey Walters

The Blessing and Curse of Computational Engineering Software

We have all heard it countless times - "Garbage in, garbage out". As applied to engineering, and specifically to computational engineering software, the admonition is clear - we have to be certain we are properly specifying our engineering input to the software which will compute the behavior we seek to understand. How can we as engineers maximize the productivity that comes from engineering software while minimizing the pitfalls? There is no one correct answer to this timeless question but I will attempt here to convey some insights I have gained. When I started my engineering career almost 30 years ago I...
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Trey Walters

AFT 20th Anniversary Conclusion: Prizes, Awards and the Future of AFT

Last month AFT concluded its 20th year as a world leading provider of fluid flow simulation software products. A year ago I wrote about AFT's 20th anniversary and the prizes we would be awarding. Here is a list of all the lucky winners. Congratulations! AFT has a hard earned reputation for excellence in our products and our technical support. For the next 20 years we plan to build on that reputation.  Here are some things to keep an eye out for from AFT this year: The release of AFT Fathom 9 with a host of new features The release of AFT...
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Trey Walters

Falling Oil Prices...Good or Bad?

Everyone - at least everyone in the USA - is talking about falling oil prices: US consumers are delighted by the lowest gas prices seen for many years - see " Holiday sales buoyed by low gas prices, falling jobless rate ".  Many businesses and those that work in or depend on the oil industry are fearful. Recent discussion of this can be found in BusinessWeek articles " Oil City Prepares for Pain " and " Oil Drillers Are Under Pressure to Scrap Rigs to Cope With Downturn ". Policy makers in the USA face new challenges - see " For...
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Trey Walters

The Power of Global Editing

Global editing is a powerful feature that has existed in all AFT software since version 1.0. The Global Editing windows for pipes and junctions allow engineers to input or modify data for all or a select group of pipes and junctions in a model. This saves countless time when there are many modeling changes that need to be made.  Rather than making changes one by one, changes can be made once and applied to an unlimited number of pipes or junctions. The global editing feature works the same on AFT Fathom , AFT Arrow , AFT Impulse , AFT Mercury and...
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