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Stephanie Villars is an Applications Engineer with Applied Flow Technology (AFT) where she provides technical support to individual clients using AFT products. Stephanie is a graduate of the Colorado School of Mines with her Bachelor of Science in Chemical Engineering with a minor in Computational and Applied Mathematics. 

Stephanie Villars

Quick Guide to Custom Output

You've built a model, verified all of the inputs, and now you have results, but how are you going to organize and present these results? Here is a quick guide to some of the customization available in AFT software for displaying output and exporting your data using the Output, Visual Report, and Graph Results windows. The screenshots and examples f...
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Stephanie Villars

Having model convergence problems? Start here!

Trying to run a model and running into convergence errors? Here are a few common tips to help with model convergence for AFT Fathom, AFT Arrow, and the steady state modes for AFT Impulse and AFT xStream. Though these tips will not work for all models, they have helped with many of the steady state convergence cases that have come through the AFT su...
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Stephanie Villars

Modeling Fans, Blowers and Compressors - Oh My!

For gas systems flow is driven either by a pressure difference, or by a turbomachine. AFT Arrow allows users to model turbomachines such as fans, blowers and compressors. For this blog we'll talk about what differentiates these three options, and how to model them using AFT Arrow.    Definitions and Types Fans, blowers and compressors all...
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Stephanie Villars

Back to the Basics: Calculating and Defining Head

While thinking in terms of pressure is often intuitive for engineers, thinking in terms of head can be more challenging. You may be surprised by the number of cases and questions that come to the support team here at AFT about the basic definition of head, and how it relates to hydraulic modeling. Let's get back to the basics with how head is defin...
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Stephanie Villars

What is the ANS Module Asking For? Introduction to the Sizing window in the ANS Add-on Module

Many of you are aware that AFT released the ANS module for AFT Fathom and AFT Arrow last year to help engineers minimize the cost of their system and maximize reliability. You can check out this blog I wrote last year for a quick recap on the capabilities of ANS. Let's talk a bit more about what information you need to use the ANS module by introdu...
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Stephanie Villars

Fathom 11 New Features at a Glance

  Recently AFT announced our new release of Fathom 11. With our new release we have been working hard to create a more robust and faster version of Fathom. Along with improved performance we have added several new tools that have been requested by customers. Here is a quick summary of the top 5 new features that you can look forward to in Fath...
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Stephanie Villars

Where to Start with Pump Startups

Any time a rapid transient occurs in a piping system, there is a chance for unexpected surge to impact the system. Though system shutdowns account for many surge events, pump startups can cause water hammer as well. For this blog I am going to cover the basics of setting up pump and valve transients for the startup case in AFT Impulse 7, as well as...
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