35 安定成層中における孤立峰周りの流れの可視化(指示薬法)

抄録

The stratified flow past an isolated mountain was produced by towing the inverted body through saline-water solution with linear density gradients. The Froude number Fr(=U/NH) and Reynolds number Re(UH/ν) where U is the towing speed, N is the Brunt-Vaisala frequency.H is the mountain height, and ν is the kinematic viscoaty.were in the range Fr<1 and Re<1500. The flow in such ranges as it corresponds with the real atmosphere. Flow visualization techniques by the color dye infection were used tograsp the global structure of this flow. Two kinds of ph indicator was solved in the tracer as chemical of coloring. And we obtained a conclusion that the flow can be divided roughly three patterns. Quantitative measurments by the density probe clarified in the detail the three dimentional figure of the internal gravity wave.