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
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The objectives of this study are to estimate how wind speed and direction of typhoon change time depending on irregular ground and the thermal dynamics. Governing equations are conservation of mass, momentum, heat and moisture. Physical models are based on the typhoon pressure model proposed by Schloemer, the cloud model by Mellow and Yamada, and the vegetation model by Deadorff. Boundary conditions are based on the radiation for the vertical direction by Klemp, and the open boundary model for the lateral boundary by Orlanski. Using the calculated pressure, the center pressure and the typhoon scale are evaluated. The motion of typhoon is based on the momentum equations. The coordinate origin is always at the center of typhoon. The ground data are allowed to change and the physical values are interpolated at every step. These equations and the scheme are applied to Typhoon T9119, which occurred in Sep.1991. Calculated wind speed and direction agreed with the measured data.
