Effect of a Marginal Inclination on Pattern Formation in a Binary Liquid Mixture under Thermal Stress
Effect of a Marginal Inclination on Pattern Formation in a Binary Liquid Mixture under Thermal Stress
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DOI：
10.1103/physrevlett.111.014502
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发表时间：
2013-07-03
影响因子：
8.6
通讯作者：
Vailati, Alberto
中科院分区：
文献类型：
--
作者：
Croccolo, Fabrizio;Scheffold, Frank;Vailati, Alberto
流体层中的对流运动受到其相对于重力场的方向的影响。我们研究了二元液体混合物热应力层的长期稳定性，结果表明图案形成受到小至几毫弧度的边缘倾斜的强烈影响。在小瑞利数下，传质以诱导的大尺度剪切流为主，而在较大瑞利数下，则以溶液对流为主。在过渡处，溶质流和剪切流之间的平衡产生了沿高速公路配置中的平行车道以相反方向移动的漂移柱状流。
Convective motions in a fluid layer are affected by its orientation with respect to the gravitational field. We investigate the long-term stability of a thermally stressed layer of a binary liquid mixture and show that pattern formation is strongly affected by marginal inclinations as small as a few milliradians. At small Rayleigh numbers, the mass transfer is dominated by the induced large scale shear flow, while at larger Rayleigh numbers, it is dominated by solutal convection. At the transition, the balance between the solutal and shear flows gives rise to drifting columnar flows moving in opposite directions along parallel lanes in a superhighway configuration.