Fluids Special Methods

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Next Level Hydrodynamics

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The modern towing tank expanded into a Swiss Army knife of experiments. Time to see what new tricks the tank holds for us!
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The Ship Towing Tank

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It may look like a swimming pool, but towing tanks exist for a different purpose. They are a fundamental tool of ship design.
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Guts of CFD: Multiphase Modeling

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Multiphase CFD includes multiple fluids. How does VOF achieve this, and what are the implications for CFD modeling? Read on to learn more . . .
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Practical CFD Modeling: Mesh Deformation

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CFD Mesh deformation is incredibly frustrating, but unavoidable for body motions in CFD. Learn strategies to plan for your next mesh deformation project.
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Practical CFD Modeling: Time Variation

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When we add the time variation, CFD adds a few modeling requirements. Today we discuss these extra requirements. Get guidance for unsteady simulation.
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Practical CFD Modeling: Volume of Fluid Modeling

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CFD models multiple fluids with the volume of fluid method. Learn the practical details of this technique. Discover the world of VOF modeling.
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Practical CFD Modeling: Turbulence

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As the CFD engineer, you need to describe boundary conditions for your turbulence equations. This article typical turbulence values for normal simulations.
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Guts of CFD: Near Wall Effects

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Turbulence does tricky things near walls. Turbulence is most critical near the wall, so how to consider near wall effects? Learn more here.
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Guts of CFD: Turbulence

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Turbulence is the defining feature of modern computational fluid dynamics (CFD). What type of approximation, and which turbulence model should you select?
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Guts of CFD: CFD Linear Solution

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How do we stretch the limits of linear algebra to accommodate non-linear CFD equations? How do we take the mathematics from one cell and apply them to millions of cells?
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Practical CFD Modeling: Judging Convergence

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CFD convergence is not an exact science. Monitors, flow patterns, and residuals. Learn how to use these tools and reliably juge convergence.
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Guts of CFD: Interpolation Equations

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If we want to solve the equations of computational fluid dynamics (CFD), we need a way to fake calculus. Enter interpolation equations.
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Guts of CFD: Transport Equation

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Transport equations form the fundamental language of CFD. Today we explain transport equations and the significance of their terms.
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Guts of CFD: Navier Stokes Equations

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Navier Stokes is essential to CFD. Today we review Navier Stokes Equation with a focus on the meaning behind the math.
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Practical CFD: General Approach

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Just fresh out of college, and the boss assigned your first project for computational fluid dynamics (CFD). You are excited. You can’t wait to begin the challenge. You sit down at your computer, start up the CFD software . . . and freeze like a deer in headlights. How to begin? What to do first? Today we discuss the general workflow for a CFD project and highlight some general modeling advice.
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CFD Workflow

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What happens behind the curtain when the CFD engineer goes to work? What goes into making a CFD simulation? As a project manager, you need to understand the workflow of a CFD project; this helps you plan the project and track budget expenses. When we understand the workflow, we know the right questions and can anticipate project delays.
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Which CFD?

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Is there anything that CFD can’t do? Practically speaking, we can achieve the result, but you may regret paying for the answer. Several CFD projects involve combinations of different CFD methodologies. Combined together, they evolve into a major project risk. Gain some insight about the risk factors for your next CFD project. Plan a strategy to minimize project risks so that you don’t get caught by combining unknown cost increases.
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What is CFD

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What is CFD? It uses the computer and adds to our capabilities for fluid mechanics analysis. If used improperly, it can become an incredible waste of time and money. With the right engineer, CFD can be cost effective, incredibly informative, and offer unparalleled flexibility. But what is this wonder of modern science? Learn more about this expansive tool.
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Improve Engineering Value

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We all want to feel good about paying for engineering analysis. Sometimes the best answer drives us to maximize value, rather than minimize cost. In those cases, you do better to go beyond basic safety and search for enhancements. Today we discuss four engineering tasks where you can maximize your value. Extract every last drop of knowledge from your engineering project.