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首页> 外文期刊>International Journal of Heat Exchangers >Bubbling Convection Patterns in Immiscible Two-phase Stratified Liquids
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Bubbling Convection Patterns in Immiscible Two-phase Stratified Liquids

机译：不相溶的两相分层液体中的气泡对流模式

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The bubble plume is considered transport phenomena capable of generating large-scale convection due to the buoyancy of bubbles. The surface flow generated by a bubble plume is a technique proposed to collect the surface-floating substances, especially the oil layer formed during large oil spill accidents in order to protect naval systems, rivers, and lakes. The motivation of this research is to broaden the understanding of oil flow in the stratified layer of oil on the free surface. In this case, the density and viscosity difference between the two fluids causes an unsteady interface motion. Laboratory experiments and numerical simulation based on the Eulerian-Lagrangian model have been carried out in order to investigate the multi-dimensional motion of water and oil due to bubbles. The flow structure of bubble-induced convection in a stratified liquid is investigated by using particle imaging velocimetry (PIV) measurement and pathline measurements. As a reference, in a thermally stratified liquid the liquid flow pattern of bubble-induced convection has also been measured by using thermo-sensitive liquid crystal tracer particles in which a color-image processing is combined to measure the temperature field. These results were compared to the immiscible stratified cases.
机译：气泡羽被认为是由于气泡的浮力而能够产生大规模对流的运输现象。气泡羽流产生的表面流是一种收集表面漂浮物质的技术，特别是在大型溢油事故期间形成的油层，以保护海军系统，河流和湖泊。这项研究的动机是拓宽对自由表面上油分层层中油流的理解。在这种情况下，两种流体之间的密度和粘度差异会导致界面运动不稳定。为了研究气泡引起的水和油的多维运动，已经进行了基于欧拉-拉格朗日模型的实验室实验和数值模拟。通过使用粒子成像测速（PIV）测量和路径测量，研究了分层液体中气泡引起的对流的流动结构。作为参考，在热分层液体中，还通过使用热敏液晶示踪剂颗粒来测量气泡引起的对流的液体流动模式，其中结合了彩色图像处理以测量温度场。将这些结果与不混溶的分层案例进行了比较。

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