July 2012

Feeling a little deja vu here - Caedium v4 still needs a little more polish before it's ready for release, but it's really, really close - really! To tide you over, included in this month's news is another Caedium v4 sneak peek and a selection of recent blog posts.

Caedium v4 Sneak Peek CFD SimulationCaedium v4 Sneak Peek CFD SimulationAir flow through porous media

Caedium v4 Sneak Peek: Porous Media CFD Simulation

You will be able to simulate flow through packed beds and filters in the next release of the Caedium CFD software system. Caedium will support Porous Media using Darcy's Law for volumes and double-sided faces. Read more >>

CFD and a Human Powered Centrifuge

Exercise is a crucial ingredient for astronauts to maintain some semblance of their physiological well being and if you can combine that with exposure to artificial gravity then all the better. Enter the Human Powered Centrifuge (HPC), possibly destined for the International Space Station (ISS). It's an un-stationary bicycle that when pedaled spins around generating artificial gravity. Problem solved, right? Not so fast - nothing in space is that easy. When exercising, astronauts generate up to two times more carbon dioxide (CO2) than when relaxing and that level of CO2 could potentially cause problems for the sensitive ISS life support system. What to do? CFD to the rescue. Read more >>

Super Cavitation Watercraft

Say you've been tasked with designing a new water pleasure craft optimized for speed called the Slickjet (fictional name). You ask the fundamental question - how do you travel fast through water? Easy, get as much of your Slickjet out of the water as you can. You know that the drag force acting on a totally submerged shape in water will be about 1000 times higher than for the same shape in air - the drag force scales according to the density of the fluid and water is 1000 times denser than air. Of course this assumes you are willing to get FAA approval for an aircraft rather than a boat. However, there is an alternative in that if you can somehow cocoon parts of your Slickjet in an air bubble as it moves through the water then you can convince the physics that those parts of your Slickjet are moving through air rather than water. This process is known as super cavitation and results in the drag forces acting on those parts of your Slickjet being more like those encountered in air rather than water. Read more >>

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Caedium v4 Released

For the full story on the Caedium v4 release see "Simulate Free Surface Flows Using a Volume of Fluid CFD Solver"

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