Host: Science Council of Japan
Co-host: Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineering of Japan, Japan Society of Steel Construction, Japan Society of Civil Engineering, Meteorological Society of Japan
Pages 23
A visual study has been made of the stably stratified flows over a ridge or a ridge with a valley. The experiments were performed by towing models through linearly stratified saline-water solutions. The Froude number Fr (=U0/NH) was changed from 0.05 to 1.67 ( and ∞), where U0 is the towing speed, N the Brunt-Väisälä frequency and H the height of models. Flow patterns around models were visualized and the velocity fields at several vertical cross sections were measured by PIV method. In the case of a ridge with a valley, the flow has converged to the valley and a strong flow has been generated leeward along the slope of the valley at low values of Fr. When Fr>0.8, however, the flow converging to the valley could not been observed.
