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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.

Viewing Output Across Multiple Scenarios

AFT Arrow 4.0 and AFT Fathom 7.0 offer the ability to view text output across multiple scenarios simultaneously, greatly facilitating seeing the differences in results between scenarios. To view multiple scenario output, open Output Control either from the Analysis menu or, when the Output window is active, by clicking the toolbar button, and then selecting the Multi-Scenario tab. Under Display Type select Selected Scenarios and click the Select Scenarios button to open the Select Scenarios window. Select the scenarios you want to see output for and click OK to return to Output Control where the selected scenarios will now appear in...

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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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Campus Steam System Redesign Moves Forward After Data Matches AFT Arrow Model

2013 Platinum Pipe Award Winner - Correlation to test/field data   Schuyler Engineering was asked to confirm a 2010 study that recommended that Rockland Psychiatric Center convert to using low pressure steam. Modifications would cost over one million dollars, so constructing a model would give further confidence to the previous study and determine if the conversion to low pressure steam should proceed.     Click here to read the case study and learn how AFT Arrow test results validated previous study results.   Schuyler Engineering is a professional consulting firm specializing in the evaluation, engineering, design, permitting and construction supervision of heating...

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Modeling a submerged pump in AFT Impulse

In AFT Impulse you can directly model a submerged pump. First, you will define your pump data exactly as you would normally, however you will only draw the discharge piping and not a suction piping. After doing this, you will check the box “Submerged Pump” at the bottom of the Pump Specifications Window. You now have an additional required input field. The “Suction Pressure” can be entered as a Head (HGL) or a Pressure. When entered as a Head (HGL) value, this value is the actual liquid elevation in the supply reservoir. When entered as a pressure, this is the actual...

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Using Three Way Valves in AFT Fathom

AFT Fathom provides a Three Way Valve which increases the Engineer’s capability to model system control. The Three Way Valve Properties Window shows the three connecting pipes in drop-down lists, which allows users to specify which pipe is the combined flow pipe, and which two are the split flow pipes. By entering the loss profile through each flow path, and then by selecting the actual percent open, Fathom will calculate the actual loss values for each flow path. Using the Three Way Valve in conjunction with the Goal Seek & Control module (GSC) increases the Engineer’s capability to model I&C logic...

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Case Study: DuPont Saves Millions of Dollars With AFT Fathom on Slurry System Operational Problem

DuPont experienced severe operational problems on a new product line that put at risk a multimillion dollar investment. The system involved pumping of a non-Newtonian fluid which behaved as a Power Law fluid. AFT Fathom’s unique capability to model valves and fittings was critical to identifying the cause of the problem and guiding the solution. DuPont engineer Dan Wood teamed with AFT President Trey Walters to present a technical paper this week at the 28th International Pump User Symposium in Houston, Texas. There they presented the problem and resolution which involved a new valve and fitting calculation method developed by AFT...

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Graph Sets

In all of our core products (AFT Fathom, AFT Arrow, AFT Impulse), we offer the ability to save graph sets. This has the potential to save a lot of time when reviewing multiple graphs of different parameters. In order to define a graph set, first construct and customize the graph you would like to review. Then open the “Select Graph Data” window from the View menu and click the button “Save Set As…”. After entering a graph set name, click ok, and you have just created a graph set! At this point you can modify any parameters in your model, re-run...

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