TWO-FLUID TAYLOR-COUETTE FLOW : EXPERIMENTS AND LINEAR THEORY FOR IMMISCIBLE LIQUIDS BETWEEN COROTATING CYLINDERS
TWO-FLUID TAYLOR-COUETTE FLOW : EXPERIMENTS AND LINEAR THEORY FOR IMMISCIBLE LIQUIDS BETWEEN COROTATING CYLINDERS
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双流体泰勒-库埃特流动:共转圆柱体之间不混溶液体的实验和线性理论
DOI：
10.1063/1.869833
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发表时间：
1998
影响因子：
4.6
通讯作者：
M. Graham
中科院分区：
文献类型：
--
作者：
G. Baier;M. Graham
本文研究了同心同向旋转圆柱体之间环形间隙中一对径向分层不混溶液体的离心不稳定性：两流体泰勒-库埃特流。实验结果表明，该方法可以得到界面清晰的两层流动，且在每一相都有泰勒涡。实验结果是在良好的一致性与预测的无粘参数的基础上的两个阶段的扩展瑞利准则，以及详细的线性稳定性计算。对于一个给定的几何形状，最稳定的配置发生在流体的大致（精确地在无粘极限）相等的动态粘度。对于具有足够低的粘度的流体，我们还通过实验观察到另一种不稳定性，这显然是两种流体的不稳定性的薄膜的液体涂层内的旋转鼓。
We investigate the centrifugal instability of a pair of radially stratified immiscible liquids in the annular gap between concentric, corotating cylinders: two-fluid Taylor–Couette flow. Experiments show that a two-layer flow with a well-defined interface and Taylor vortices in each phase can be obtained. The experimental results are in good agreement with predictions of inviscid arguments based on a two-phase extension of Rayleigh’s criterion, as well as with detailed linear stability calculations. For a given geometry, the most stable configuration occurs for fluids of roughly (exactly in the inviscid limit) equal dynamic viscosities. For fluids with sufficiently low viscosity, we also experimentally observe another instability that is evidently the two-fluid analog of the instability of a thin film of liquid coating the inside of a rotating drum.