Three-Dimensional Vortex Simulation of Rollup and Entrainment in a Shear Layer

摘要

The transport element method is extended to three dimensions to study theevolution of scalar fields in a flow with high vorticity concentration. Two grid-based on two grid-free methods for the computation of vorticity stretching are implemented. The methods are applied to study the evolution of an initially two-dimensional shear layer, perturbed in the streamwise and spanwise directions. Preferential entrainment is detected along the spanwise direction due to the streamwise vorticity.... Numerical analysis, Vortex methods, Shear layers.