The Dam-Break Problem in a Semi-Open Channel

IF 0.6 4区 物理与天体物理 Q4 MECHANICS
V. V. Ostapenko
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引用次数: 0

Abstract

In this paper, we consider the nonclassical dam-break problem in a semi-open rectangular channel in the first approximation of the shallow water theory when the liquid is under the lid in the upper pool of the dam (i.e., it completely fills a semi-infinite rectangular container) and the liquid surface is free in the bottom pool. It is shown that there is a unique piecewise constant self-similar solution to this problem, in which the hydraulic bore in the bottom pool of the dam is modeled by a shock wave, the descent wave in the upper pool of the dam is modeled by a strong discontinuity (when passing through which the total energy of the liquid flow is conserved), while the flow in the region between the hydraulic bore and the descent wave is approximated by a constant solution. Experimental modeling of this problem will make it possible to obtain wave flows that arise when liquid flows out of a rectangular container, a special case of which is the classical Benjamin flow.

Abstract Image

半明渠溃坝问题研究
本文考虑了在浅水理论的第一近似下,当坝体上池的液体处于盖下(即液体完全填满半无限大的矩形容器),而底池的液体表面是自由的情况下,半开矩形河道中的非经典溃坝问题。结果表明,有一个独特的分段常数自相似解这个问题,在液压孔底池的大坝被冲击波建模,血统波上池的大坝是由一个强大的不连续建模(当通过液体流动的总能量是守恒的),而该地区流动之间的液压孔和血统波是由一个常数近似的解决方案。这个问题的实验模型将使我们有可能得到当液体从矩形容器流出时产生的波流,其中的一个特殊情况是经典的本雅明流。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Doklady Physics
Doklady Physics 物理-力学
CiteScore
1.40
自引率
12.50%
发文量
12
审稿时长
4-8 weeks
期刊介绍: Doklady Physics is a journal that publishes new research in physics of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia in the form of short articles. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.
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