B221 RAMS モデルによる複雑地形上の気流計算

概要

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We are developing MEASURES, Multiple Radiological Emergency Assistance System for Urgent Response, which can identify the nature of nuclear accident and predict its course and the environmental consequences. RAMS, the Regional Atmospheric Modeling System, is used for forecasting meteorological phenomena in MEASURES. In this study, we conduct two things to make RAMS more accurate and speedy. First, we implement two turbulence models, which can be applied to micro-scale phenomena, into RAMS. In case of the simulation of air flow over a 3D hill using the new turbulence models, it is found that the calculated result shows good agreement with wind tunnel data for wind velocity and total kinetic energy. Second, we design the time-split method in order to reduce calculation time. By using this method, calculation time may be inversely proportional to the number of CPU of PC parallel computer.
日本流体力学会の論文
2002-07-23