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AFT Impulse Over the Years

November 21, 2016, marks AFT Impulse 's 20th anniversary! Below is a timeline that captures a few of the most significant ways it has evolved from Version 1.0 to Version 6.0.   
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Erin Onat

Combining Pipes in AFT Impulse to Decrease Model Run Times: How Resistance Curves Are Merged into Pipes to Increase Pipe Section Length

They say that time is of the essence, and as engineers, that couldn’t ring truer! AFT pipe flow software is there to help engineers save time by more safely, efficiently, and rapidly designing and analyzing their piping systems. AFT Impulse , Applied Flow Technology’s waterhammer tool, helps engineers analyze transient incompressible flow behavior that can cause potentially detrimental pressure surges. It uses the Method of Characteristics, which requires the pipes to be sectioned using a Characteristic Grid. In this Characteristic Grid, all of the pipes are broken into an integer number of section lengths, and pressure waves are assumed to propagate...
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Recent Comments
Ajay
Hi Erin, This method really helps to reduce the runtime of model but in some model like the one which i have with me has few small... Read More
Friday, 05 May 2017 06:37
Erin Onat
Hi Devendra, Thank you very much for your comment, and I'm very glad that you have found this blog useful. There is no way to ig... Read More
Monday, 08 May 2017 17:25
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Trey Walters

AFT Impulse 20th Anniversary: A Perspective From the Original Impulse Developer

Twenty years ago today I was working desperately on putting the finishing touches on AFT Impulse 1.0. At the time, AFT was a pioneer in every sense of the word. AFT was the first and only company developing visual, drag-and-drop pipe flow modeling software for  Microsoft Windows . And AFT Impulse was set to become the world's first visual waterhammer software for Windows. We already had orders for AFT Impulse before it was complete, such was the demand! The day-to-day demands of getting AFT going as a company was slowing down the completion of AFT Impulse. So I turned over the day-to-day tasks...
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Jeff Olsen

Getting the Perfect Picture – Graph Formatting Options

Previously, we talked about the Graph Guide , creating Stacked graphs and Dual-Y graphs, and visualizing the results using Animated graphs. This final installment will focus on the various ways to format graphs so they are exactly how you want them to look. In general, there are several ways to set the formatting for the various parts and regions of a graph. I will start with the model we made in the previous blog – the AFT Impulse model, ‘Pump Startup With Event Transient.imp’, which is installed in the Examples folder. Many of the formatting options are gathered together on the...
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Erin Onat

That was EASY! Quickly Change Pipe and Junction Input Data into AFT models using Excel Change Data

Users and potential users of AFT software frequently ask how they can expedite the model input process so that they can get the results they need as rapidly as they need. I’m pleased to report that AFT software has an abundance of features that make the model input process tremendously efficient: global pipe and junction editing, copying input data from other pipes and junctions, and finally, importing data using the Excel Change Data parameters spreadsheet (which is what we are discussing in this blog). The Excel Change Data feature works by importing data from an Excel spreadsheet populated according to a...
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Recent Comments
Judy Hodgson
Nice! Thanks for the links to the files -- made the post 100% more useful.
Tuesday, 25 October 2016 17:49
Erin Onat
Hi Judy! Thanks for the comment. I'm very glad that made the post helpful.
Wednesday, 26 October 2016 18:02
RACHIT JAIN
That's Very well explained. I'm expecting something over "GIS Shapefile Import".
Friday, 24 March 2017 07:43
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Trey Walters

Inside, Outside, On Top Of and Behind the Incredible Hoover Dam

A little over 30 years ago I made a mistake. At the time I was a busy undergraduate student in mechanical engineering in California. Some students put together an official weekend trip for ME students to the Hoover Dam that included a special tour of the dam geared towards engineers and engineering students. I remember having tons of homework to do and decided not to go on the weekend trip. That was a mistake and I have regretted it ever since.

One outcome of that mistake is that I have rarely, if ever, missed another chance to go on a technical tour. Another outcome is that I have been trying to fit in a Hoover Dam visit ever since. I have been to or through Las Vegas (about 45 minutes from Hoover Dam) probably 30 times since then. But I could never find that half-day I needed to visit the dam with the other priorities I was trying to balance (usually involving my family that included four children). Until a couple of weeks ago.

Another twist for me involves the professor who taught me Statics (the study of stationary structures like dams). I was incredibly fortunate to take a Statics class when I was 19 years old from Howard Eberhart. He was an outstanding teacher and memorable character. Professor Eberhart towered over most of us students at 6' 4" (1.93 m) in height. I will never forget his steely blue eyes, bald head, and deep, gravelly voice proclaiming (for the hundredth time), "It is all...simple...statics!". 

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Trey Walters

(Almost) Live Report From the HUUUUGE MINExpo in Las Vegas

This week I was in Las Vegas at the 2016 MINExpo . AFT had a booth at the show and I hoped to publish this during the show and call it a "live" report. Alas I did not get it completed and the show ended yesterday. Hence it is "almost" live. Over the years I have had the privilege to teach training classes to mining companies on five continents. AFT has been active in support of the needs of the mining industry since we released the Settling Slurry (SSL) module for AFT Fathom in 2009 and the SSL module for AFT...
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