TRANSIENT DOUBLE DIFFUSION IN A STABLY STRATIFIED FLUID LAYER HEATED FROM BELOW

被引：12

作者：

KAZMIERCZAK, M

POULIKAKOS, D

机构：

[1] Mechanical Engineering Department, University of Illinois at Chicago, Chicago, IL

来源：

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW | 1990年 / 11卷 / 01期

基金：

美国国家科学基金会;

关键词：

double diffusion; numerical simulations; transient;

D O I：

10.1016/0142-727X(90)90021-3

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A series of two-dimensional transient numerical simulations is presented for the problem of double diffusion in a horizontal fluid layer linearly stratified in a stable manner with a salt gradient, and heated from below. For the numerical simulations the complete form of the governing equations, subject to the usual Boussinesq approximation, is utilized. A constant heat flux condition is imposed at the bottom warm wall of the system that generates a single well-mixed flow region which grows with time. The growth of the bottom region and the increase of the local and average bottom wall temperature are investigated. Furthermore, results are presented that aim to improve our understanding on the effect of the geometric aspect ratio of the system (H/L) as well as the effect of the ratio of the thermal to the solutal Rayleigh number (stability ratio, χ = Ra/Ras) on the evolving temperature, concentration and flow fields. Overall, the trends identified by earlier studies on double diffusion in a horizontal fluid layer are observed and a wealth of new information is reported. © 1989.

引用

页码：30 / 39

页数：10

共 21 条

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