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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v28.i3.80
13 pages

Internal Waves Behind a Local Disturbance upon its Weakly Non-Stationary Motion in Stratified Fluid of Finite Depth

R. V. Ol'khovsky
Kyiv Taras Shevchenko National University
O. G. Stetsenko
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine

ABSTRAKT

A method of plotting an asymptotic field of the internal waves behind the local disturbance moving in a weakly non-stationary regime at large values of the Froude number is proposed. The method is based on the use of the locally two-dimensional character of evolution of the internal waves field behind the uniformly moving local disturbance as well as on the use of the geometric optics methods for the expansion of wave rays in horizontally homogeneous mediums. The use of the method is demonstrated in terms of an ovoid body moving in the non-stationary regime in a three-layered stratified medium.


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