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Applied Flow Technology

Challenges Executing Fluid Flow Projects?

Resource planning for engineering projects can often be a challenge.  Just when you’ve finished finding projects for all of your staff, an unexpected client call occurs which requires immediate additional technical personnel.  Or, your best fluid flow engineer has recently left the company – just in time for you to be awarded a large integrated team engineering project in which they were proposed to play a key role.         Purple Mountain was originally founded to provide consulting support for AFT software products  and has since evolved to assist clients with a broad range of fluid flow challenges. If...
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Applied Flow Technology

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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Applied Flow Technology

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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Applied Flow Technology

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 28 th International Pump User Symposium in Houston, Texas. There they presented the problem and resolution which involved a new valve and fitting calculation method developed...
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Applied Flow Technology

Graph Sets

In all of our core products ( AFT Fathom , AFT Arrow , AFT Impulse , AFT Mercury , AFT Titan ), 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...
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Applied Flow Technology

Jumping Specification Windows

In the process of making specification changes to a sequence of pipes or junctions, one may find it easier to jump from one pipe (or junction) to the next without closing the current specifications window. This can be accomplished by clicking the “Jump” button in the specifications window. Clicking the Jump button will open a dialog where the next pipe or junction number can be selected. Once the selection is made, clicking on the jump button will advance the existing specifications window to the selected pipe or junction number. To make things even faster, pressing F5 within an active specifications window...
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Applied Flow Technology

Graph Sets

In all of our core products ( Fathom , Arrow , Impulse , Mercury , Titan ), 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...
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