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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.

How to Fill as Quadratic

Filters and screens impose a pressure drop that varies with flow rate. The variation is non-linear, but manufacturers will often provide only one data point for pressure loss at the design flow rate. Using a single point, or constant pressure drop, can produce significant inaccuracies in your model. With this in mind, AFT offers the “Fill As Quadratic” option for entering loss data.   Using only a single point, “Fill As Quadratic” will create two additional points for you. This first is simply 0,0; zero flow produces zero pressure drop. The second point is 2 x Flow and 4 x Pressure...

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Jumping From Pipe to Pipe or Junction to Junction

You can jump from junction to junction or from pipe to pipe by pressing F5 while in a specifications window.

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Limiting Goal Seek and Control Variables to a Desired Range

Applicable to: Arrow GSC Add-on Module, Fathom GSC Add-on Module When searching for a variable value that will yield a specified goal, GSC will investigate all possible variable values. There are some cases, however, where you may want to limit the range of investigation. An example might be using GSC to find the pump or fan/compressor speed to yield a defined goal. On its own GSC will consider any speed value from 0% on up. You may want to limit this to a maximum of 100% speed and/or some lower speed limit based on manufacturer's information or experience. This can be...

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  1879 Hits

Creating a Model With GSC Solution Variable Values

To create a version of your model with input values equal to the solved GSC variables, with the Output window open, make a disconnected scenario from the View menu.

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Pipe Elevations at a Reservoir

Specifying a pipe connected to a reservoir using a pipe depth will keep the pipe at a constant elevation relative to a changing liquid elevation. For a constant absolute pipe elevation, specify the connected pipe using pipe elevation.

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Using Orthogonal Pipe Drawing in AFT Fathom 7.0

A new feature in AFT Fathom 7.0, orthogonal pipe drawing automatically inserts an intermediate vertex into a pipe and adjusts the length of the pipe segments to create a right angle graphical bend between the pipe end points. Orthogonal drawing can be turned on either from Options, Workspace Preferences Display Options tab, or quickly toggled on and off with the F4 key. By toggling orthogonal drawing on and off you can easily mix pipe drawing modes and even have drawing modes compliment each other. For example, with orthogonal drawing toggled off, select a pipe and insert a segment using AFT Fathom's...

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Using Zoom Select

The zoom select tool is a quick way to zoom into an area of interest. If you click the zoom select tool and draw your selection box the selected area will expand to fit the selection box. The drawn selection box will expand to fit your Workspace so that the magnification will will vary according to the size of the selection box and the area of the model selected. Alternatively you can always have zoom select zoom to 100% by clicking the zoom select tool then holding the shift key down while you draw the selection box and release the mouse...

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