Drag increment of internal waves generated by horizontally moving spheroid in supercritical regime

作者：Xu, Zhaoting^*; Xu, Hao; Gorodtsov, V A

来源：Acta Mechanica Sinica, 2008, 24(2): 127-132.

DOI：10.1007/s10409-008-0145-2

• internal wave
• stratified flow
• drag increment
• spheroid
• internal Froude number

A theory on the drag increment of internal waves with a spheroid moving horizontally at a high velocity (or for large internal Froude number) in uniformly vertically stratified fluid (or ocean) is presented in the present paper. A surface source distribution is employed to model a hydrodynamic interaction between the spheroid and the stratified fluid. From theoretical results, it is shown that there exists an asymptote of zero-drag increment in supercritical regimes, where internal Froude numbers are larger than the critical internal Froude numbers. When the spheroid reduces to a sphere, the results in this paper is in good agreement with the previous theoretical and experimental results of the sphere.

• 出版日期2008-4
• 单位中国海洋大学; 上海交通大学