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

Mars, Martians and the Marvelous March to Space

Unless you happen to be marooned somewhere on Jupiter or beyond it has been hard to miss all the talk about Mars in recent days and weeks. What actually is on Mars? Water? Life? Can we send humans to Mars? Should we send humans to Mars? If we can and should, how can and should we do it?  Perhaps a good place to start is this video I highly recommend watching - " Guys build amazing 7-mile-long model of the solar system, to scale ". As I watched the video it brought back vivid memories of grade school for me. My...
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Trey Walters

A Personal Experience: The Mismatched Compressor and Air Distribution System in My Home

Mismatched fluid handling machinery and the systems they service are a frequent occurance in industrial, municipal and commercial fluid transfer installations. And, as I found out this morning, in residential installations. Specifically, in the residential installation in which I personally live. Two summers ago I bought a new home in the Colorado Spring area. It has an air conditioning unit that only distributes air to the upstairs. Upstairs has only bedrooms and a bathroom. Colorado Springs is a beautiful city that sits at the base of the world famous Pikes Peak . The local elevation of the city is 6000 ft...
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Trey Walters

Making the Most of Your Extra Time

"Who has extra time?", you ask. Well, at least for today, we all do. Because today is the day on which a "leap second" will be added - according to this article in TIME magazine . But you can find extra time in other ways that do not depend an calendar adjustments. That time is found by accomplishing your assigned engineering tasks in less time. And that is where AFT software can and does help engineering companies in 70+ countries around the world. Below is a list of the top five ways AFT software saves engineers time: Top Five Ways AFT...
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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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