Vortex model to define safe aircraft separation distances

An approximate model of wake vortices behavior is presented. We have introduced modifications In the Greene's model to take into account the effects of ground (divergence, rebound) and crosswind (advection, shear). Direct numerical simulations of laminar flows with and without lateral wind are performed to validate these extensions, The first results are encouraging and efforts are carried on to derive a more reliable model. The capability of this model to mimic the reality is shown by comparison with an experimental test case.