A dynamical model for turbulence

摘要

We presented two applications of our new model which is based on a simple hypothesis about the small scale evolution. This approach is different from traditional turbulent models since our m9del provides an expression of the turbulent Reynolds sub-grid stress via estimate of the sub-grid velocities rather than velocities correlations. This model leads to a reduction of simulation time with respect to DNS as the small scales are computed with a linearized equation using a semi-Lagrangian method.