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AFT Product Tips

Welcome to the Applied Flow Technology Blog.
Ben Keiser

Databases 401 - Managing Databases

So by now, you should be about ready to graduate from my courses on Database Management and have become an expert on how to customize AFT software for your specific needs!  Databases 101 was the introductory course that walked you through the basics and flexibility available to you with relation to using databases in AFT software.  In Databases 201, we got slightly more technical as you learned how to create your own fluid database.  Things got more rigorous in Databases 301 where you learned how to create your own custom pipe material database. In our final course, Databases 401, you will...
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Jeff Olsen

Things Are Really Stacking Up – Creating Stacked Graphs

Using graphs that are stacked on top of each other is a great way to see the variation of several parameters at once and how one interacts with the others. There are several ways to create stacked graphs using the new graphing features in AFT applications, which I will cover here. I am going to start with the AFT Impulse model, ‘Pump Startup With Event Transient.imp’, which is installed in the Examples folder. I am going to use the ‘One Pump Start With One Running’ scenario. We will first compare the flow and pressure in the pipe path from the Supply...
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Jeff Olsen

What Would You Like to Do? – Exploring the New Graph Guide

The primary way to view results when using Impulse is through graphical data. With the release of AFT Impulse 6, the power of the graphing features has been greatly increased. With this enhanced capability comes additional complexity. It is a kin to the power and complexity of in-dash radio consoles in modern cars compared to the old stereo in my old Ford Pinto. To help users navigate the new capabilities of this powerful graphing tool, we have developed a ‘Graph Guide’ which points out the steps to accomplish many of the common tasks in creating, modifying and keeping graphs. The Graph...
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Ben Keiser

Databases 301 - Those Are Some Nice Pipes!

In continuation to my past two blogs regarding how AFT's software database structures and fluid databases greatly enhance flexibility and efficiency, the power that stems from creating customized pipe material databases is no different! AFT's Software Products incorporate several different pipe materials that you can work with such as steel, stainless steel, ductile iron, copper, PVC, HDPE, etc.  However, should you be worried if you do not see a pipe material in our list of available pipe materials that you need to work with???  Not at all!!  Easily create your own custom pipe material and it will be added to your local user...
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Recent Comments
Guest — Rachit
Hi Ben, How could we share the pipe material database with the client? Which we have prepared in AFT Impulse .... Read More
Thursday, 03 January 2019 03:44
Ben Keiser
Hi Rachit, please refer to my Databases 401 article and that will explain how. Here is where you can find that blog, https://www.... Read More
Thursday, 03 January 2019 16:00
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Erin Onat

Getting that Stubborn AFT Fathom Model to Converge

The majority of steady-state, incompressible hydraulic models made in AFT Fathom that we see as Applications engineers typically converge very rapidly. However, every once in a while, that occasional AFT Fathom model arrives in our Support inbox that just won’t converge. At first glance, passing a graduate level course in compressible flow without ever missing an exam question may seem more likely than getting to the source of the convergence issue in one of these typically-monstrous models (like in Figure 1), but the tips below show that determining and correcting the problem preventing convergence is frequently straightforward and much easier than...
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Ben Keiser

Name That Fluid - Databases 201

AFT Software offers lots of different fluid modeling options of common fluids with the AFT Standard Fluids that are available in AFT Fathom, AFT Arrow, and AFT Impulse.  The AFT Standard Fluids can be accessed in the System Properties window and they provide fairly accurate thermophysical properties. But what happens when there is a fluid that you need to model and it does not exist as an AFT Standard Fluid in the software?  Well, there is no need to fret in this situation!  You can very easily create your own custom fluid and add it to the fluid database! The Fluid...
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Dylan Witte

Calibrate Your Pipeline Using GSC

You’ve built your AFT Fathom or AFT Arrow model, defined all pipes and junctions, specified your fluid properties and defined your pressure boundary conditions. But for some reason, your predicted flows are still not matching measured data. AFT Fathom or AFT Arrow is properly solving the fundamental equations, but it is likely that something is off in the inputted data. In many cases, this is the pipe’s resistance. Many factors can alter a pipe’s resistance, but the two primary reasons resistance may be incorrect is (1) corrosion of the pipe over time, which increases a pipe’s absolute roughness and (2) the buildup of residue on the walls of the pipeline, known as scaling, which decreases a pipe’s inner diameter. This decrease in diameter is very important and will increase a pipe’s resistance dramatically. Now you have a dilemma. You can’t cut open your pipe to see how much scaling there is or how much your pipe has corroded. What is the condition of your pipe? Using AFT Fathom GSC or AFT Arrow GSC, you can find out!

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Recent Comments
Guest — Caitlyn
Dylan--I'm trying to apply GSC scaling on a completely defined suction model, but the only variables I can specify are for junctio... Read More
Thursday, 17 March 2016 16:39
Dylan Witte
Hi Caitlyn, Using pipe parameters such as roughness, scaling, design factor, or insulation thickness as variables for GSC is a ne... Read More
Thursday, 17 March 2016 17:06
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