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.

Using Groups

Groups of pipes and junction can be named for later recall. This is done using the Group Tools on the Edit menu. Groups may have subgroups, and pipes and junctions may be members of multiple groups. To create a group select the pipes and junctions you want in the group, then select Edit/Groups...Create. Specify a name for the group, click OK and the Group Manager will be displayed showing the pipes and junctions in the group. Group Manager can also be used to add or remove pipes and junctions from an existing group, rename a group or delete a group. After...

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Making Use of the Quick Access Panel

With the release of AFT Fathom 8 and AFT Impulse 5, there is an incredibly useful new feature available on the Workspace called the "Quick Access Panel".  This feature allows you to quickly and easily work with several useful features of the software in one area such as the Scenario Manager, Pipe and Junction Inspection, Workspace Overview Map, the Checklist, and ability to activate the add-on modules. Scenario Manager Access to the full Scenario Manager capabilities exists in the Quick Access Panel.  Add new scenarios, clone scenarios, promote scenarios, re-order scenarios, add notes for scenarios, etc. Properties The Properties tab in...

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Estimating Pump Inertia, Specific Speed, and Four Quadrant Data within AFT Impulse 5

An excellent new feature of AFT Impulse 5 is that it is possible to estimate the pump inertia, specific speed, and four quadrant data sets directly within AFT Impulse 5!  No more need to perform external spreadsheet calculations for these estimates. In addition to that, AFT Impulse 5 can use the entered pump and power/efficiency curve to perform these estimates which makes things much easier and efficient!! First step is to enter pump curve data and generate the curve fits as shown in Figure 1. Figure 1:  Pump Performance Curve from Entered Data   Next, click on the "Transient" tab of...

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Benefits of the Discrete Gas Cavity Model

AFT Impulse 5 now includes a second cavitation model option: The Discrete Gas cavity Model (DGCM). So, what is it and how is it different from the existing cavitation model? This article will provide a very high level overview. The method of characteristics (the finite difference basis for 1D transient flow modeling) assumes a constant wave speed for each pipe, from time step to time step. There are, however, many things that would cause a change in wave speed; cavitation being one the most significant. A change in wave speed will have a dramatic effect on the pressure spike that occurs...

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Changing Output Language in AFT Products

AFT Applications have the ability to display the output in different languages. We supply files for French and Spanish with our installation which should be used. Other language files can be created using the language.dat file template. To select a new language select Output Language from the Tool menu and then select the language you would like to use. Once a new language is selected the Output Control will reflect the output parameters in that language. When the model is run and the results will be displayed in the Output tab in the selected language. The Graph Results and Visual Report...

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You’ve got a nice piping system! But how much will it cost?

You have just finished designing your system and built a model of your system in AFT Fathom and have convinced your team and the client that the system will achieve all the desired pressures, flow rates, and temperatures.  The next big question is, “How much will this system cost?”  With AFT Fathom, you have the ability to answer that question in great detail! You can easily determine the full cost of pipe materials and system components!  Not only that, but you can quickly figure out how much it will cost to install and operate the entire system!   You will even be...

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Show Junction Locations

One of the many new features in AFT Impulse is the ability to show junction locations in profile plots. This can be enormously helpful when analyzing large, complicated systems. When enabled, all junction locations are identified by a vertical bar with a junction ID flag at the top. To show junction locations, click on the button in the toolbar.Show Junction Locations will also work for animations.

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