Radially spreading buoyant flows
Radially spreading buoyant flows
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DOI：
10.1080/00221686.2001.9628287
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发表时间：
2001-12
影响因子：
2.3
通讯作者：
G. Lawrence;M. MacLatchy
中科院分区：
文献类型：
--
作者：
G. Lawrence;M. MacLatchy
研究了垂直浮力射流冲击表面后形成的径向扩散流的性质。以往的研究提供了相互矛盾的结论是否内部水跃的形式在径向扩散流。不同研究者的实验已经被检查。径向流最初表现得像浮力表面射流，其厚度线性增加是由于通过剪切不稳定性将环境流体夹带到射流中。最终，浮力占主导地位，这些不稳定性崩溃，留下几乎恒定厚度的径向浮力羽流。实验的可视化没有提供令人信服的理由来假设内部水跃的存在。
The nature of the radially spreading flow that forms after a vertical buoyant jet impinges on the surface has been investigated. Previous studies have provided conflicting conclusions as to whether or not an internal hydraulic jump forms in the radially spreading flow. Experiments by various investigators have been examined The radial flow initially behaves like a buoyant surface jet whose thickness increases linearis due to the entrainment of ambient fluid into the jet via shear instabilities. Eventually, buoyancy forces dominate and these instabilities collapse leaving a radial buoyant plume of almost constant thickness. Visualisations of the experiments provide no compelling reason to postulate ihe existence of an internal hydraulic jump.