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Feature Articles

Targeting a Specific y+ Value for your Turbulent Flow CFD Simulation (Part 2)
This blog post is a follow up to a previous blog post (Part 1).  In the first blog post the following topics were discussed: What is a y+ value? Laminar vs turbulent flow. How to determine if your flow is laminar or turbulent? Introduction to wall functions. In this blog we will go into more […]
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Targeting a Specific y+ Value for your Turbulent Flow CFD Simulation (Part 1)
The topic of targeting a specific y+ value for a turbulent flow simulation is a very important topic. There is however a bit of groundwork that needs to be done before being able to build a mesh to target a specific y+ value. In this first part we will focus mainly on the following topics: […]
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Superposition and Its Use in FEA
Introduction Superposition is used in many different scenarios for structural calculations. In fact, the method is so useful that multiple names were even “invented” for it when used for a specific application: Static load combinations. Modal dynamics. Load-case combinations. Load reconstruction. Because so many different methods use it, a separate article on the topic is […]
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An Introduction to Modal Methods for Dynamic Analysis
Overview Modal methods in Finite Element Analysis (FEA) are extensively used in dynamics because it can dramatically reduce the runtime of certain types of models. The most common use is for modal-transient and modal frequency response analysis. Interestingly enough, it is a badly understood method with a common misconception being: “It solves in the frequency […]
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Frequency Response Analysis - What Is it?
Introduction Frequency response analysis in Finite Element Analysis (FEA) is used to calculate the steady-state response due to a sinusoidal load applied to a structure at a single frequency. It is a specialized type of transient response analysis that is extremely efficient to solve a very specific type of model. In the rest of the […]
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Modal Analysis: What It Is and Is Not
What is a Modal Analysis? What answers do we get out of it? How is it useful? What does it not tell us? In this article, we’ll discuss where a modal analysis comes from, what it is and to some extent what it is not. We’ll also discuss why we do it, what we get […]
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How Accurate is FEA?
More precisely: “How accurately can an FEA (Finite Element Analysis) predict the real response of a structure?” Let’s start by introducing the typical process (chain) of getting from a real structure to an FEA model with results: Set up 3D CAD (Computer Aided Design) geometry of the real structure Simplify the CAD by removing unnecessary […]
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