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Surface characters of internal waves generated by Rankine ovoid

机译:朗肯卵形产生的内波的表面特征

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摘要

与 pycnocline 在成层的液体产生的内部波浪上的一个线性理论在这篇论文被介绍。象在成层的液体的速度地那样的内部波浪地和在免费表面的速度坡度地也借助于理论、数字的方法被调查。从数字结果,内部波浪由水平地移动 Rankine 产生了,这被显示出卵形是在一个波浪指南宣传的一种套住的波浪,并且它的波形是一种马赫前面类型在 pycnocline 的内部波浪。在免费表面的流动地上的内部波浪的影响由速度坡度地被代表源于 Rankine 的运动产生的内部波浪卵形。同时,它也在假设下面被看那在胶粘的液体,在在免费表面的表面速度坡度地之间的同步性和在液体的内部波浪地被保留。这个理论打开可能性进一步在免费表面学习布拉格波浪的调制光谱。
机译:A linear theory on the internal waves generated in the stratified fluid with a pycnocline is presented in this paper. The internal wave fields such as the velocity fields in the stratified fluid and velocity gradient fields at the free surface are also investigated by means of the theoretical and numerical method. From the numerical results, it is shown that the internal wave generated by horizontally moving Rankine ovoid is a sort of trapped wave which propagates in a wave guide, and its waveform is a kind of Mach front-type internal wave in the pycnocline. Influence of the internal wave on the flow fields at the free surface is represented by the velocity gradient fields resulted from the internal waves generated by motion of the Rankine ovoid. At the same time, it is also shown that under the hypothesis of inviscid fluid, the synchronism between the surface velocity gradient fields at the free surface and the internal wave fields in the fluid is retained. This theory opens a possibility to study further the modulated spectrum of the Bragg waves at the free surface.

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