Two-fluid Taylor–Couette flow: Experiments and linear theory for immiscible liquids between corotating cylinders
作者:
Gretchen Baier,
Michael D. Graham,
期刊:
Physics of Fluids
(AIP Available online 1998)
卷期:
Volume 10,
issue 12
页码: 3045-3055
ISSN:1070-6631
年代: 1998
DOI:10.1063/1.869833
出版商: AIP
数据来源: AIP
摘要:
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. ©1998 American Institute of Physics.
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