Fluid dynamics

Computational Fluid Dynamics (CFD) is a poweful tool with which one can simulate all kinds of physical fluids and gas flows.

We are extremely passionate about this tool but we always look at the result as something much more than what the output is in numbers and pictures. We see the positive environmental impact we have generated through decreasing the fuel consumption of a car, airplane or perhaps a gasturbine. We see the consumer enjoy walking past a wind power turbine without being disturbed by any aerodynamically induced noise. We see train passengers enjoying the comfortable climate from the inside of the passenger compartment. And we see our satisfied customers realising that they did the right thing when asking us for support.

To identify a possible problem, we choose from performing compressible or incompressible simulations, in 3D or 2D. Problems can include subsonic or supersonic speeds and we can either resolve the complete boundary layer or use known boundary layer models for approximations. The former is a necessity when performing aero-acoustic analyses and one need to capture the small eddies.

We run either large scale LES simulations for e.g. aero-acoustic analyses, or small scale RANS simulations for aerodynamic analysis and design. We use commercial codes such as CFX and Fluent, but we are also experienced in running Edge, a solver developed by the Swedish Defence Research Agency (visit www.foi.se/edge) and we can of course also run our analyses in the open source code Open Foam. We can run fully parallelized simulations on large Linux cluster and choose from RANS, U-RANS, hybrid RANS/LES or pure LES simulations.