AFT Blog
The Opposite of Good Vibrations - Evaluating FIV, AIV, FIP Guidelines from AFT Fathom and AFT Arrow
Learn how to use AFT Fathom and AFT Arrow to help calculate the Likelihood of Failure (LOF) for Flow Induced Vibration (FIV), Acoustic Induced Vibration (AIV), and Flow Induced Pulsation (FIP) in accordance with Energy Institute Guidelines to avoid v...
It's a Pump! It's a Turbine! It's a Pump as Turbine!
Pumps and turbines may serve opposite purposes, but fundamentally, they operate under the same principles. Both pieces of equipment convert between usable work and fluid energy, and both often use an impeller to make the conversion. Differences betwe...
What Is Transient Analysis?
You're tasked to perform a transient analysis of a piping system and it would be really helpful if there was a good software tool out there to help you. Well, you've come to the right place because AFT has great solutions! ...
Know Your Pump & System Curves - Part 3
In the final "Know Your Pump & System Curves" blog series, I am going to discuss the complexities behind pump vs. system curves for systems with pumps in series and parallel configurations. Multiple pumps in series configurations are relatively s...
Digital Twin – Identical or Fraternal?
When I was a child, I was jealous of twins. I thought how cool it would be to have a twin. I had twin cousins a few years older than I was that I saw on a frequent basis. I always got them confused. Which one was Roger, and which one was Ronny? A buz...
That Valve’s Got Character – Applying Pre-defined Characteristic Curves
Valves are often oversimplified during modeling. Understandably, defining a valve with its range of Cv at various open percentages requires much more information than an engineer may have during the initial design phase. However, just like handbook d...
There are two good reasons you should care that Applied Flow Technology is celebrating it's 20th anniversary this year.
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.
AFT Impulse 5 was released today and offers a plethora of new features sure to keep waterhammer engineers more productive than ever - and help them build even safer piping systems. How did AFT Impulse get to where it is today?
Applied Flow Technology is proud to release a new version of AFT Impulse, now at version 5. AFT Impulse 5 encapsulates all of the new interface and navigational enhancements from AFT Fathom 8, as well as a considerable breadth of new and improved technical features. One such feature is our newly enhanced Relief Valve Junction. A relief valve can still be modeled as Internal, Exit, or Inline Exit, but we now offer four unique opening/closing profiles as well. With these new profiles, you can now directly model many specialty valves which were previously difficult to model accurately! Another very useful enhancement...
The Los Angeles Aqueduct conveys water from the Owens River in the Eastern Sierra Nevada mountains to the city of Los Angeles. The system provides 80% of the water to Los Angeles. Part of the aqueduct system travels through the 5.5 mile (9 km) Elizabeth Tunnel. The San Andreas fault cuts across the tunnel and a major earthquake at this location has the potential to cut off this water supply to the city for over a year.
AFT Fathom can EASILY size valves AND orifice plates with a SINGLE Control Valve junction! There is no need to perform strenuous hand calculations to determine a valve Cv or an orifice diameter. Just specify the system boundary conditions, pipe input properties, and the desired flow rate (or pressure) and AFT Fathom will calculate the Cv, K factor, and equivalent orifice diameter/area for you all at once! Figure 1 illustrates a control valve junction at the location of a valve or an orifice plate. For known flow, use a Flow Control Valve (FCV). For known upstream pressure, use a Pressure Sustaining...
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