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Welcome to the Applied Flow Technology Blog.
Ben Keiser

Behold The New Design Alert Manager!

One of the newest features of AFT Fathom 9 that will add a lot more efficiency to analyzing your results is the new Design Alert Manager!  In addition to the new Design Alert Manager, it is also possible to add general Design Alerts for junctions such as inlet or outlet pressure, or perhaps the pressure loss across a junction. In previous versions of our software, it would be possible to create different Design Alerts for pipes where you could specify a minimum or maximum value for a particular output parameter such as a maximum pressure limit, minimum flow rate, maximum velocity,...
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Jake Miller

Join our Denver Safari Workshop and User Group this November 17th

You may be asking yourself why we are advertising our Denver area User Group and first ever AFT Software Workshop in a Tips and Trick blog. Well that answer is quite simple really. As an ongoing effort to make the strongest relationship with our User’s and thus helping us to provide our community, which includes You, with the best tools ever, we yearn for the chance to talk to those that make use of our powerful tools! So we hereby cordially invite you to attend our 2015 Denver Area User Group meeting. Come see how other Users, like yourself, are using...
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Erin Onat

Calculating Flow Through an Orifice Using ASME MFC-3M-1989 and Irrecoverable Pressure Drop Equations

Recently, a customer calculated the mass flow rate of a fluid through an orifice using both the ASME standard MFC-3M-1989 and AFT Arrow. He was puzzled when this mass flow rate calculation differed by approximately 100 lb m /hr between the two methods, so he reached out to AFT for help in determining the reason for the discrepancy. The answer for the difference in flow rates on a basic level is that these two calculations are, fundamentally, not the same thing; ASME correlates differential pressure at pressure taps for purposes of flow measurement, while AFT Fathom and Arrow calculate the irrecoverable...
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Recent Comments
Erin Onat
Hi Eric and thank you for the question. The main point here is that the dP you are measuring across the orifice IS NOT equal to t... Read More
Thursday, 28 July 2016 15:39
Erin Onat
Hi Jesus, Thank you for your comment. A definitive answer to your question is outside the scope of this blog and the advice I c... Read More
Monday, 07 August 2017 15:59
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Ben Keiser

Defining & Running 12 Scenarios in Less than 10 Minutes

A couple weeks ago, I wrote a blog article about the features, functionality, and how to use the Scenario Manager  effectively in order to help the engineer save lots of time.  In this article, I'm going to demonstrate a practical example of how it is possible to setup 12 different scenarios and run them in less than 10 minutes!  The important thing to pick up from this practical example is the  thought process on how to setup the scenario tree in the most effective and efficient manner possible. Consider the system below in Figure 1 where three liquid hydrocarbons at cryogenic...
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Ben Keiser

How Many Models of the Same System Do You Have?

Well, if the answer is "more than one", then you are probably struggling to deal with way more model files than you need to be.  With all AFT products , the Scenario Manager is an incredibly powerful feature that allows one to model several different cases within a single model file. This includes different operating conditions, multiple pump configurations, different piping, system expansions, hot days, cold days, insulation, fouling and pipe scaling, etc. The list of different cases that can be modeled is essentially endless! So, I have said it once, and I will say it again... The Scenario Manager is...
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Dylan Witte

Is the Pipe Half Full or Half Empty?

Well that depends on how optimistic you are, but either way you can model partially full pipes with AFT Impulse! This means partially full along the axial direction, as opposed to partially full along the radial direction. This function only works for pipes that have a slope, and when the pipe is partially full it drains from the end with the higher elevation. Pipes which contain vacuum breaker valves, exit valves, spray discharges, or assigned pressures at the outlet can drain or fill during the transient. This draining or filling is limited to the specified pipe. AFT Impulse will not model...
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Ben Keiser

Feeling Compressed? Don’t Forget Your Thermodynamics

When dealing with a compressible gas system, heat transfer and thermal effects are very important to account for.  When a gas is flowing down a pipeline, it will cool down as the gas expands due to the frictional pressure drop.  Many would say that adiabatic or isothermal conditions will bracket the potential flow rates that are possible for a constant pressure drop in a pipe.  However, this is not the case.  If a gas is cooled or heated as it flows down the pipeline, the flow rates that can result for a given pressure drop can actually be outside the “bounds”...
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