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

When Good CFD Goes Bad

You've checked everything, and I mean everything, but still your Computational Fluid Dynamics (CFD) simulation does not resemble reality. Then it's time to consider the deeper underlying basis of your CFD software.

Mandelbrot Set From Chaos TheoryMandelbrot Set From Chaos TheoryCFD Simulations are not immune from descending into chaos
License: CC BY-SA 3.0, Wolfgang Beyer

How Aerodynamics Dominates The Tour de France

The spectacle that is the Tour de France (TdF) is all about aerodynamics - and you thought it was all about the bike. Virtually all tactics in the TdF are dictated by individuals or teams of riders attempting to limit their exposure to the 'wind', in order to minimize drag and therefore minimize the effort required to progress. There are some obvious and not so obvious tactics riders and teams employ to use aerodynamics to gain advantage.

Wacky CFD

Had any wacky/extreme/unusual/innovative/interesting/off-the-wall fluid dynamics design ideas recently? Then let Computational Fluid Dynamics (CFD) guide you through the impossible until only the best remain, no matter how wacky.

CFD Simulation of an Unusual Drone DesignCFD Simulation of an Unusual Drone Design

Go Full Circle With CFD

There is a certain circular symmetry to the process by which you can perform Computational Fluid Dynamics (CFD) simulations on a computer, which is also due in part to CFD.

CFD Performed for a Dust CollectorCFD Performed for a Dust Collector

CFD Expertise Is Your Modern Day Pick and Shovel

News just in from Bloomberg is that Larry Page, of Google fame, is funding not one (Zee.Aero) but two (Kitty Hawk) personalized flying-machine (dare I say flying cars?) startups. With a number of other companies pursuing the same goal, it seems a gold rush of sorts is on. Yet remember the real gold rush? The real benefactors were the pick and shovel makers. The equivalent in this flight to the future are employees with highly prized skills brought to bear on a decidedly tricky problem. And at the sharp end of those with specialized skills are...Computational Fluid Dynamics (CFD) experts - providing valuable insights into aerodynamics, propulsion, batteries, and electrical/electronics cooling.

Fig. 1 from Zee.Aero Patent Filing For A 'Personal Aircraft'Patent US20130214086

CFD Benefits From 3D Printing

It turns out that preparing geometry models for 3D printing has a lot of similarities with preparing geometry for Computational Fluid Dynamics (CFD). Both require watertight non-manifold geometry, otherwise your model will plunge your 3D printer or your CFD software into chaos.

Airflow CFD Simulation Around the Smithsonian Air and Space MuseumAirflow CFD Simulation Around the Smithsonian Air and Space MuseumStreamlines

Cutting Planes Reveal Yet More Hidden CFD Secrets

Yet another way to reveal the hidden secrets of your Computational Fluid Dynamics (CFD) simulation is to create a face, usually a plane and often referred to as a cutting plane, to serve as a target for interpolated results.

HVAC CFD Simulation of a RoomHVAC CFD Simulation of a RoomVelocity vectors on two cutting planes

Clipping Planes Reveal Even More Hidden CFD Secrets

Clipping planes are another tool to reveal hidden regions of your Computational Fluid Dynamics (CFD) results.

CFD Simulation of an Air MultiplierCFD Simulation of an Air MultiplierVelocity iso-surfaces after using XYZ-clipping planes

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