ENTRAINMENT BEHAVIOR ON DENSITY INTERFACE OF STRATIFIED FLUIDS

Entrainment behavior on a density interface of stratified fluids is very important for the design of innovative nuclear reactors. In the present study, the turbulent energy in the upper stratified fluid was supplied by an injection and extraction flow. The turbulent intensity in the upper fluid was proportional to the injection and extraction velocity at the nozzle. The entrainment was done by liftup of filaments from peaks of the interfacial wave. The entrainment velocity was inversely proportional to the overall Richardson number. These results could be obtained when the turbulent energy released from the energy-containing eddy was proportional to the energy consumption by the entrainment.