Along the whole development process, the CAA orientation has been kept in mind for all the decisions and lead to the choice of the following methods:
  • Compressible 3D Navier stokes solver
  • Transient explicit time integration
  • LES Turbulence
  • Acoustic boundary conditions
  • Fluid Structure coupling

These ingredients are needed to perform CAA simulations with no particular assumptions on the flow (except for the use of a turbulence model), the fluid structures coupling or the vibrations, making Radioss a fairly general code.

Further developments are considered among which can cite the ability to deal with bent flows. In the real world, in many interesting cases, the object to be studied is not positioned on a flat ground but embedded within a complex geometrical shape (for example a side mirror on a car). The flow, which hits the component, is distorted by this geometry. Simulation of the whole vehicle with a CAA method is not practical beyond a few hundred Hertz because of the huge number of elements needed in the propagation zone. Therefore, a method mixing a steady state simulation of the far field to get proper bent boundary conditions and Radioss close to the component and the acoustic sources zones is currently under development to perform CAA analysis of this kind of problem well beyond 1000 Hz.