Magnetically-Forced Oscillatory Flow over Shallow Topographies

概要

論文の詳細を見る
Results are described of laboratory and numerical studies of the quasi-2D oscillatory flow over shallow topographies. A periodically oscillatory flow is forced to form magnetically at the center of a shallow water tank, of which the flat bottom floor is incised by a rectangular-cross-sectional straight trough or a V-shaped-cross-sectional straight trough spanning across a width of the tank. The basic flow pattern is an induced steady streaming which consists of four counter-rotating, symmetrical, vortices. The principal effect of a trough is that the streaming over it is constrained to flow closely along its rims, while the symmetry of the four-vortex system is well preserved. The effect of background rotation on the streaming is also explored. The result shows that the symmetry is broken conspicuously of the four-vortex system, in which two cyclonic vortices appear to grow up. Numerically simulated streamline patterns agree qualitatively with the experimental ones for non-rotating cases.
九州大学の論文
2000-09-30