Submitted by Richard Smith on June 12, 2014 - 12:21
Every 4 years the FIFA World Cup rolls around and the question on everyone's lips is...how will the official match balls behave? Oh, and to a lesser degree, which nation will win? Ball aerodynamics are complex, but relatively well understood. Given the typical speed and spin of balls in the beautiful game, small changes to their surface texture (the focus of much recent effort in ball design) can have dramatic repercussions on their trajectories and hang times. Balls are deemed so important that each has its own Wikipedia page and each has tournament-flavored names thanks to Adidas, the long time ball designer.
Submitted by Richard Smith on April 29, 2014 - 09:50
It is a common occurrence: a rain drop falls into a puddle; a leaky faucet drips into a sink of water. This seemingly simple event has some complex physics in play that advanced multi-phase, free-surface (volume of fluid - VOF) Computational Fluid Dynamics (CFD) can simulate. Not only can CFD simulate water impact in a pool, it can also produce a beautiful 3D visualization of the process as an animation. Follow along to see how you can use Caedium Professional to simulate a water droplet falling into a pool of water.
Submitted by Richard Smith on April 17, 2014 - 12:34
The next release of the Caedium CFD software system will be able to simulate the convection and diffusion of a passive species, also known as a passive scalar. A passive species can represent and track additions such as smoke in airflow and dye in water. It can also provide insights on the dispersion of pollutants carried by a fluid.
Caedium Passive Species CFD SimulationPollutant plume released in air from a chimney
Submitted by Richard Smith on April 10, 2014 - 14:19
Previously I showed how to automate a sequence of Caedium Computational Fluid Dynamics (CFD) simulations of an alpha sweep for an airliner. Next up I will show you how to automate the export of results from Caedium in a specific format. This example focuses on the files required for ixCube 4-10 (the successor to ixForten 4000) to perform a structural analysis using the pressure coefficient (Cp) from an airflow simulation over a tensile structure or membrane.
Submitted by Richard Smith on April 1, 2014 - 00:00
Aerodynamics plays a crucial role in the performance characteristics of outdoor cycling. However, no-one to my knowledge has used Computational Fluid Dynamics (CFD) to analyze the aerodynamic performance of a stationary bicycle - at least until now!
SketchUp Model of a Stationary Bicycle and Cyclist
Submitted by Richard Smith on March 26, 2014 - 13:09
Computation Fluid Dynamics (CFD) is synonymous with impressive 3D visualization. Learn more about the basic 3D visualization techniques in CFD and how they can help you reduce the mass of raw data from a simulation into insightful and beautiful graphics.
3D Visualization in CaediumCFD simulation of a cyclone
Submitted by Richard Smith on March 18, 2014 - 08:14
Turbulence modeling for the Reynolds Averaged Navier-Stokes (RANS) equations - the basis of most industrial Computational Fluid Dynamics (CFD) software - is a complex field. Trying to strike a balance between accuracy and computational efficiency has given rise to a relatively large number of different turbulence models. I am not aware of a definitive list to match turbulence models to applications - if you are, please share! With this in mind I'll share 6 suggestions before you consider switching the default turbulence model in your CFD software.