Effects of particle properties on segregation-band drift in particle-laden rimming flow
Effects of particle properties on segregation-band drift in particle-laden rimming flow
复制标题
颗粒特性对含颗粒边缘流中偏析带漂移的影响
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
P. Thomas
中科院分区：
文献类型：
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作者：
E. Guyez;P. Thomas
我们在实验上研究了颗粒流体的边缘流动。我们开始研究时空分离带动力学的细节，这是我们在其他地方最先记录的[E.Guyez和P.J.Thomas，Phys。莱特牧师。100、074501(2008年)]。存在8个相关的无量纲参数，它们必然会影响颗粒边框流动中偏析带的漂移动力学。在这里，我们总结了研究这些参数中的三个参数的影响的实验结果，这些参数涉及颗粒大小和颗粒密度。结果表明，其中两个参数对频带漂移的启动是至关重要的，并且当这两个参数中的任何一个参数的值低于相关的临界阈值时，频带就会变得稳定。基于这两个参数的物理相关性，我们得出结论：带状漂移的起始受毛细作用力和万有引力的竞争的强烈影响。研究的第三个无量纲参数..。
We experimentally study rimming flow of a particle-laden fluid. We begin to investigate the details of the spatiotemporal segregation-band dynamics that were first documented by us elsewhere [E. Guyez and P. J. Thomas, Phys. Rev. Lett. 100, 074501 (2008)]. There exist eight relevant nondimensional parameters that must be expected to affect the drift dynamics of segregation bands in particle-laden rimming flow. Here we summarize results from experiments investigating the effects of three of these parameters that involve the particle size and the particle density. It is shown that two of the parameters are crucial to the initiation of the band drift and that bands become stationary whenever either one of the two parameters adopts values below an associated critical threshold. Based on the physical relevance of the two parameters it is concluded that the initiation of band drift is strongly affected by a competition between capillary forces and gravitational forces. The third nondimensional parameter studied...