Large Eddy Simulation (LES)

LES is often regarded as an impractical tool for industrial CFD applications as it requires large computational resources.

LES is associated with the severe requirements of small mesh size and time step size so that the turbulent length scale and time scale in the inertial range is properly resolved. These simulations also have an issue with resolving flows close to walls where energetic vortical structures become very small with the increase of Reynolds number. However, there are cases where LES provides significant benefits, including combustion chemical reaction problems and acoustic problems.