Direct measurments of the mutual-entrainment velocity at a density interface

Abstract

Through exeriments for horizontally homogeneous shearing flow, characteristics of mutual entraiments are observed. The velocity fluctuations near the density interface became relatively large. This shows the mutual entrainment toward the upper-and the lower layer-directions were caused simultaneously near the interface by shear instability.
With visualization technique it is observed that the mutual interactions between the vortex shear layer and the gravity wave play a dominant role on the interfacial mixing.
The characteristics of mutual entrainment are also analyzed considering the interraction between the dynamical property of vertex shear layer and graviry wave.