EXPERIMENTAL STUDY OF THERMAL CONVECTION IN A VERTICAL CYLINDER OF MERCURY HEATED FROM BELOW

被引：48

作者：

VERHOEVE.JD

机构：

[1] Institute for Atomic Research, Department of Metallurgy, Iowa State University, Ames, IA

来源：

PHYSICS OF FLUIDS | 1969年 / 12卷 / 09期

关键词：

D O I：

10.1063/1.1692736

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Very precise temperature measurements have been made on a vertical circular column of liquid mercury, and also a mercury-zinc alloy, heated from below. In both pure mercury and the alloy, two types of temperature oscillations, indicating two modes of time-dependent fluid flow, were observed. The first oscillatory mode appeared at a Rayleigh number 10% higher than the critical Rayleigh number for the onset of fluid flow predicted by linear stability theory. At higher Rayleigh numbers this mode disappeared and the second oscillatory mode, having a shorter period, began at Rayleigh numbers 30% above the critical value. Both types of temperature oscillations are consistent with a pulsed mode of fluid flow. Attempts to detect the predicted, steady, antisymmetric flow at the onset of fluid motion by means of lateral temperature measurements were unsuccessful. Copyright © 1969 by the American Institute of Physics.

引用

页码：1733 / &

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