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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.

Seeing Double – Using Dual Y-Axis Graphs

Previously, we talked about the Graph Guide and how to create Stacked Graphs. Another way to see the interactions between parameters is to show them on one graph with dual Y-axes and a common X-axis scale. I am going to again start with the AFT Impulse model, ‘Pump Startup With Event Transient.imp’, which is installed in the Examples folder, and use the ‘One Pump Start With One Running’ scenario. In the previous blog, we used a Stacked Graph to examine the pressures and flows at two valves (J6 and J9), which opened during the simulation. This time, we will put them...

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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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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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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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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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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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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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