Richard Smith's blog

Walkalong Tumblewing Meets CFD

To complete this series of Computational Fluid Dynamics (CFD) on simple rotating paper wings, we now turn our attention to the walkalong tumblewing.

CFD Simulation of a Walkalong TumblewingCFD Simulation of a Walkalong TumblewingVelocity vectors at 0 degrees

Tumblewing Meets CFD

Although a sheet of paper can be made to fly by spinning, it isn't always reliable. By adding winglets and flaps with 4 simple folds we can improve the stability of the wing and in so doing produce a tumblewing. How do the aerodynamics of a tumblewing compare with a sheet of paper? It just so happens Computational Fluid Dynamics (CFD) can help, just as it did with the simulation of the spinning sheet of paper.

CFD Simulation of a Rotating TumblewingCFD Simulation of a Rotating TumblewingPressure iso-surfaces at 90 degrees

Spinning Paper Sheet Meets CFD

I don’t think anyone would argue with the fact that paper airplanes are simple (and fun!), but what is the simplest paper airplane that can still fly? I give you a single rectangular piece of paper without any folds that will gently spin around its longest horizontal axis if released with a long edge parallel to the ground. Next, what is the simplest Computational Fluid Dynamics (CFD) method that can capture the essence of the spinning paper? I give you the Moving Reference Frame (MRF, also known as the frozen rotor method) option for CFD. Combine the two and you arrive at an interesting simulation of a simple phenomenon.

CFD Simulation of a Rotating Paper SheetCFD Simulation of a Rotating Paper SheetVelocity vectors at 90 degrees

Get Started With CFD

New to Computational Fluid Dynamics (CFD)? Then you've come to the right place. Becoming productive in CFD can be a daunting task. However, as with all long term goals, if you break it down into smaller, achievable tasks, in no time you'll be up to speed and ready for production level work. Assuming you are familiar with the fluid dynamics of your application, then let's begin.

CFD Simulation in CaediumCFD Simulation in Caedium

Caedium Clarified

Based on the inquiries we receive concerning Caedium and our business model I thought it would be useful to share the most common clarifications. Also you can find answers to common questions in our FAQs. Don't see the clarification that you seek? Then feel free to ask your question in the comments below.

Caedium Professional in ActionCaedium Professional in Action

Here Come The Drones

It used to be that to design and build a flying machine was an expensive endeavor, what with pilots, wind tunnel tests, prototypes, etc. Not any more though - welcome to the brave new world of Unmanned Autonomous Systems (UAS) or Unmanned Autonomous Vehicles (UAV) or, more popularly, simply drones. How did we get to this point and where is it going? What role, if any, will Computational Fluid Dynamics (CFD) play in this drone future?

Quadcopter DroneQuadcopter DroneBy Airbunny (Own work) [CC BY-SA 3.0], via Wikimedia Commons

Cycling Joins The Aero Club

The 2015 Tour de France is in full swing and it is abundantly clear that aerodynamics has risen to be the primary technological focus of the event. Just like the aerodynamic transformation of Formula 1 (F1) that took place in the 1960s, cycling is now pre-occupied with all things aero. Unlike F1 the concern for cycling is to minimize drag, whereas the realization in F1 was that downforce, not drag, was the key to improved performance.

State-Of-The-Art Aero Road Bike

CFD Support Worth Paying For

Computational Fluid Dynamics (CFD) software is not like other desktop applications, such as a word processor. Using a word processor to write a novel is usually undertaken without expecting that the word processor software vendor to also provide help constructing sentences and paragraphs. Yet in the CFD industry that is exactly the expectation (need) of CFD users, i.e., CFD users expect help from a CFD vendor on how to construct a model (sentences) and run a simulation (paragraphs).

Horsfall Racing Electric Racer Front View of PressureCFD Support Gets You There

Pipe Fun With CFD

After replicating the classic pipes screensaver in Caedium for fun, the next obvious step was to run Computational Fluid Dynamics (CFD) simulations for each pipe network to ramp up the fun even higher.

CFD Simulation of Multiple Pipe NetworksCFD Simulation of Multiple Pipe NetworksParticles represented by arrows

Learn CFD Through Play

Rather than wait until your project schedule dictates it's time for Computational Fluid Dynamics (CFD) analysis, allocate time now to 'play' with CFD. By 'play' I mean construct simple geometry and keep your cases relatively small, so you can get familiar with the basic features of your particular CFD software in a timely manner.

Caedium at PlayCaedium at PlayMimicking the classic pipes screensaver

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