Laboratory Study on the Entrainment Process in Overflow

During the sinking process, overflow generates an entrainment phenomenon, accompanied by occurrence, development, and dissipation of vortices. In this paper, particle image velocimetry (PIV) technology is used to measure flow fields sinking, invasion, mixing. order quantitatively analyze mixing processes during overflow, vorticity, turbulence dissipation, Froude number, local Richardson coefficient are calculated. a stratified environment, entrains environment fluid lower density reach terminal height where their equals that surroundings then spread out horizontally. The experimental results show depth related overflow. density, smaller depth. turbulent mainly occurs in area along slope process invading surrounding. extreme corresponding maximum velocity shear vorticity. At point crosses sill at front end there will be more obvious phenomenon entrainment. parameter positively correlated with These preliminary would require additional validation data observation assess relevance for realistic regimes.