抄録
The unsteady motion of a two-dimensional incompressible shear layer and its mass transfer process were numerically simulated by using the Discrete Vortex Method combined with the third-order Upwind Finite Difference Method. The visualized distribution of mass concentration showed that the occurrence of entrainment corresponded to the large eddy motion. The distribution profiles of the average concentration and the fluctuation intensity showed similarities. The distribution profile of the average concentration had a stepwise shape and that of the fluctuation had two peaks. The entrainment of the fluid of the high speed side proved to be larger than that of the low speed side.
