MOTION OF A VORTEX NEAR A FREE-SURFACE

被引：15

作者：

TYVAND, PA

机构：

[1] Department of Agricultural Engineering, Agricultural University of Norway

来源：

JOURNAL OF FLUID MECHANICS | 1991年 / 225卷

关键词：

D O I：

10.1017/S0022112091002227

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The early motion of a single vortex suddenly placed near a free surface is studied analytically. The general initial/boundary-value problem is solved in terms of a Taylor expansion in time. The vortex position and the surface elevation are determined to third order. We find a precise distinction between subcritical (weak) and supercritical (strong) vortices. All vortices start with retrograde horizontal motion. After a short time, subcritical vortices tend to turn and continue their motion in the prograde direction. Supercritical vortices cannot turn, but will continue their retrograde motion. They will accumulate a surface mound until surface breaking eventually occurs.

引用

页码：673 / 686

页数：14

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