成層2流体の密度境界界面からのエントレインメント挙動 : 第2報, 高リチャードソン数条件でのエントレインメントの減衰

抄録

Entrainment behavior from a stagnant lower fluid to a turbulent upper fluid in vessels of different sizes was studied experimentally and theoretically. The turbulent energy in the upper 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 previous study proved that the entrainment velocity was inversely proportional to a Richardson number Ri^* less than l00. In the present study, the depression of the entrainment was observed at Ri^* of l00∼ 200. This behavior could be predicted with the turbulent energy balance between the energy released from the energy-containing eddy and the energy consumed by entrainment and dissipation.