RESEARCH PAPERS: Natural Convection

Oscillatory Natural Convection of a Liquid Metal in Circular Cylinders

[+] Author and Article Information
Y. Kamotani, F.-B. Weng, S. Ostrach

Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106

J. Platt

NASA Lewis Research Center, Cleveland, OH 44135

J. Heat Transfer 116(3), 627-632 (Aug 01, 1994) (6 pages) doi:10.1115/1.2910915 History: Received June 01, 1993; Revised September 01, 1993; Online May 23, 2008


An experimental study is made of natural convection oscillations in gallium melts enclosed by right circular cylinders with differentially heated end walls. Cases heated from below are examined for angles of inclination (φ) ranging from 0 deg (vertical) to 75 deg with aspect ratios Ar (height/diameter) of 2, 3, and 4. Temperature measurements are made along the circumference of the cylinder to detect the oscillations, from which the oscillatory flow structures are inferred. The critical Rayleigh numbers and oscillation frequencies are determined. For Ar=3 and φ = 0 deg, 30 deg the supercritical flow structures are discussed in detail.

Copyright © 1994 by The American Society of Mechanical Engineers
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