Blogs

Perfect Gifts for CFDers

Having previously determined how Santa makes his deliveries using a Reality Distortion Field, now we have also figured out how he selects the perfect gifts for each and every CFDer.

Intuition and Fluid Dynamics

Some fluid dynamics is intuitive, e.g., the water flow along a pipe, where what goes in one end comes out the other. However, most applications no matter how simple are anything but intuitive, e.g., the drag of a ball moving through air.

CFD Simulation of Flow Around a SphereCFD Simulation of Flow Around a SphereHighly sensitive to Reynolds Number

Turbulence Model Selection

Most Computational Fluid Dynamics (CFD) software provides an array of turbulence models. Knowing which model to select is not always an easy decision given trade offs between accuracy and computing requirements.

Turbulent Air Flow Behind a TruckTurbulent Air Flow Behind a TruckGeometry courtesy of Nectar Design

Double Diffusers and F-Ducts Explained

If you followed Formula 1 in 2009 and 2010 you will probably recall the terms double diffuser and F-duct. However, unless you were in the aerodynamics department of an F1 team during that period you will probably only have a sketchy idea of how these devices actually produced the elusive, race-winning, downforce that is key to F1 success.

Brawn GP 2009 BGP001Brawn GP 2009 BGP001: Double diffuser carLicense: CC BY 2.0, Jose Ma Izquierdo Galiot

Fluid Dynamics News: Hydraulic Capsule Pipelines and Fish Farming Sea Cages

Time for some fluid dynamics news with a Computational Fluid Dynamics (CFD) slant. Check out how CFD was used to make hydraulic capsule pipeline predictions and simulate the flow through fish farming sea cages.

Symmetry for CFD to the Rescue

Symmetry is a simple but powerful concept that you can use to speed up your Computational Fluid Dynamics (CFD) simulations and reduce your memory requirements. Join me in an exploration of a simple symmetry case.

CFD Simulation of a Symmetric Quarter ModelCFD Simulation of a Symmetric Quarter ModelVelocity vectors

Amazing 3D Maze Solved by CFD

If you were amazed at the 2D maze solving ability of Computational Fluid Dynamics (CFD) then you had better sit down and prepare to be even more amazed at CFD's 3D maze solving.

CFD 3D Maze SimulationCFD 3D Maze SimulationVelocity vectors

Amazing CFD

You already know that Computational Fluid Dynamics (CFD) is great at solving fluid dynamics problems, but did you also know it is able to literally solve mazes too? Prepare to be a-maze-d.

CFD Maze SimulationCFD Maze SimulationVelocity vectors

In Search of The Remaining 20 in The Pareto 80-20 Rule

Pareto analysis usually reveals a golden 80-20 rule for squeezing performance out of things. In other words - it means the majority of the performance (80%) is typically governed by a minority (20%) of factors. Pareto analysis applies equally across many disciplines from sports (marginal gains anyone?) to product design.

Reducing Pressure Loss Through a BendReducing Pressure Loss Through a BendCFD turning vane study

Never Settle For Facets

Don't settle for Computational Fluid Dynamics (CFD) software that uses (abuses) facets (e.g., STL) as geometry. If your original geometry is analytic (CAD) then mesh it directly without the conversion to facets. Otherwise it's like you have to create two surface meshes. What's wrong with that? Plenty!

Blocky Structures Are Not The NormBlocky Structures Are Not The NormDartmouth clock tower undergoing renovation aided by blocky scaffolding

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