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RESEARCH PAPERS: Natural and Mixed Convection

Steady Rayleigh–Bénard Convection in a Two-Layer System of Immiscible Liquids

[+] Author and Article Information
A. Prakash, J. N. Koster

University of Colorado, Department of Aerospace Engineering Sciences, Boulder, CO 80309-0429

J. Heat Transfer 118(2), 366-373 (May 01, 1996) (8 pages) doi:10.1115/1.2825853 History: Received June 01, 1995; Revised November 01, 1995; Online December 05, 2007

Abstract

Two-dimensional thermal convection in a system of two immiscible liquids heated from below is studied experimentally and numerically. Convection in the two-layer system is characterized by two distinct coupling modes between the layers. They are mechanical coupling and thermal coupling. These two coupling modes are visualized experimentally and found to be in reasonable agreement with numerical simulations. When buoyancy forces in both layers are of similar strength, thermal coupling is preferred. The mechanical coupling mode dominates when the buoyancy forces are very different in both layers.

Copyright © 1996 by The American Society of Mechanical Engineers
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