无限深的液体流对冰覆盖下的源所产生的力

Q3 Earth and Planetary Sciences
V. V. Bulatov, I. Yu. Vladimirov
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引用次数: 0

摘要

世界海洋极地地区和冰冻海域的一个特征自然因素是冰盖的存在。浮冰覆盖决定了海洋与大气之间的动力相互作用,它不仅影响海面的动力,而且影响地下水的动力,而冰盖及其下面的整个液体都参与了一般的垂直运动。假设冰盖是连续的,即其水平尺度超过受激波的长度,在相当自然的条件下,用弹性薄板来模拟,弹性薄板的变形很小,在物理上是线性的。解决了无限深均质液体流动对冰盖下局部源的力冲击计算问题。该问题在二维情况下得到了解决。得到了由于冰盖的存在和作用于震源而产生的波浪阻力和升力解的积分表示。给出了模拟有限宽钝半无限大体的局域源和模拟圆柱体的偶极子的作用力计算结果,并对不同的迎面流速度和浸入深度进行了计算。数值计算表明,随着源浸没深度的增加,由于冰盖的存在而引起的流体流动的力效应减小。波浪阻力和升力对入射流体速度的依赖性表现出质的不同。所获得的结果中包含不同的物理参数值,可以评估在实际海洋条件下观测到的冰盖扰动特征及其对各种自然和人为扰动源的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Force impact of a flow of an infinitely deep liquid on a source under ice cover
A characteristic natural factor of the polar regions of the World Ocean and freezing sea areas is the presence of ice cover. The floating ice cover, which determines the dynamic interaction between the ocean and the atmosphere, affects the dynamics of not only the sea surface, but also subsurface waters, while both the ice cover and the entire mass of liquid beneath it participate in the general vertical movement. It is assumed that the ice cover is continuous, that is, its horizontal scales exceed the lengths of the excited waves and, under fairly natural conditions, is modeled by a thin elastic plate, the deformations of which are small and the plate is physically linear. The problem of calculating the force impact of a flow of an infinitely deep homogeneous liquid on a localized source under the ice cover is solved. The problem is solved for the two-dimensional case. Integral representation of the solution for wave drag and lift is obtained, which arise due to the presence of an ice cover and act on the source. The results of calculations of the force action acting on a localized source, simulating a blunt semi-infinite body of finite width, and a dipole, simulating a cylinder, are presented for various values of the oncoming flow velocity and their immersion depth. Numerical calculations show that as the depth of the source immersion increases, the force effect of the fluid flow, which occurs due to the presence of an ice cover, decreases. The dependences of the wave resistance and lift force on the velocity of the incoming fluid flow demonstrate a qualitatively different behavior. The obtained results with different values of the physical parameters included in them make it possible to evaluate the characteristics of ice cover disturbances and its impact on various sources of natural and anthropogenic disturbances observed in real marine conditions.
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来源期刊
Fundamentalnaya i Prikladnaya Gidrofizika
Fundamentalnaya i Prikladnaya Gidrofizika Earth and Planetary Sciences-Geophysics
CiteScore
1.20
自引率
0.00%
发文量
0
期刊介绍: Emphasis of the journal includes the following areas:‎ ‎- fundamental and applied hydrophysics;‎ ‎- dynamics and hydrodynamics of marine objects;‎ ‎- physical fields of ocean, atmosphere, marine objects and their interaction;‎ ‎- methods and means for registration hydrophysical fields of ocean and marine objects;‎ ‎- application of information technology for solving problems in the field of hydrophysics, design ‎‎and operation of the offshore facilities system;‎ ‎- hydrosphere ecology;‎ ‎- hydrobionics;‎ As well as the most interesting scientific conferences’ reports, materials of science debates, book ‎‎reviews. From the scientists, engineers (and designers) of marine equipment, students, graduate ‎‎students and professors who specialize in the field of fundamental and applied hydrophysics.‎
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