Topographicaily bound vortices
Topographicaily bound vortices
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地形束缚涡
DOI：
10.1080/03091927808242652
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发表时间：
1978
影响因子：
1.3
通讯作者：
E. Johnson
中科院分区：
文献类型：
--
作者：
E. Johnson
本文提出了一种描述无粘、旋转、分层流体定常运动的变分原理。它被用来构造与均匀气流中地形上方的定常冷核和暖核涡相对应的非线性解。给出了直立圆柱体的具体情况下的数值结果。结果表明，在临界自由流速度以下，圆柱体上方存在一个圆形、冷态、反气旋性的涡旋，而在圆柱体的右侧(向下游看)则存在一个具有相同截面积的温暖气旋性涡旋。
Abstract A variational principle is presented which characterises steady motions of inviscid, rotating, stratified fluids. This is used to construct nonlinear solutions corresponding to stationary cold-core and warm-core eddies above topography in a uniform stream. Numerical results are presented for the specific case of a right circular cylinder. The results show that below a critical free-stream velocity a circular, cold, anticyclonic eddy is present above the cylinder and a warm, cyclonic eddy with the same cross-sectional area is present to the right (looking downstream) of the cylinder.