Numerical Simulation of Local Strong Wind Induced by Topographic Effect and Influence of Gird Resolution

Abstract

This paper describes the numerical study of a non-stratified airflow over real complex terrain. Attention is focused on a mechanism of a local strong wind induced by a topographic effect. As a result, the airflow has converged to the col and a local strong wind has been generated leeward along the slope of the col. Furthermore, the influence of the reproduction accuracy of geographical features, that is, horizontal grid resolution was examined. Consequently, to reproduce the above-mentioned local strong wind, it was shown that the horizontal grid resolution from 50 to about 100m was necessary