数値解析を用いた湖沼の吹送流解析モデルに関する2,3の考察

Abstract

This study deals with the wind-induced flows in the model lake by means of thenumerical simulation. In particular, the effects of the Coriolis terms, non-linear convectiveterms and diffusion terms in the basic equations on the calculated flow patterns are estima-ted, under the assumptions of hydrostatic pressure distribution, of uniform wind velocityand of non-stratification.The results obtained are given as follows: The circulation in the model lake dependson a dimensionless length parameter L/L', where L; the width of lake, L'; the length oflake. The velocity at the surface layer is clockwisely veered by the Coriolis terms. Thenon-linear convective terms may play an important part when the wind is strong, even ifRossby number R0 is less than 1.0. It is also realized that the flow currents on the verticalplane in the deeper part of the lake approach uniform with the increase of vertical eddyviscosity and that the horizontal eddy viscosity is not more sensitive than the vertical eddyviscosity in the circulation.