计算物理 ›› 1997, Vol. 14 ›› Issue (1): 99-105.

• 论文 • 上一篇    下一篇

矩形截面多孔介质腔体中对流分叉的有限差分研究

孔祥言1, 鹿蓬勃1, 王晓冬2   

  1. 1. 中国科学技术大学力学系, 合肥 230027;
    2. 渗流流体力学所, 廊坊 065007
  • 收稿日期:1995-11-27 修回日期:1996-11-04 出版日期:1997-01-25 发布日期:1997-01-25
  • 基金资助:
    中国科学院渗流力学课题资助

FINITE DIFFERENCE STUDY FOR CONVECTIVE BIFURCATION IN RECTANGULAR CROSS CAVITY OF POROUS MEDIA SATURATED WITH FLUID

Kong Xiangyan1, Lu Pengbo1, Wang Xiaodong2   

  1. 1. Univ. of Sci. and Tech. of China;
    2. Institute of Mechanics of Flow through Porous Media
  • Received:1995-11-27 Revised:1996-11-04 Online:1997-01-25 Published:1997-01-25

摘要: 利用有限差分方法并基于分叉理论计算了矩形截面多孔介质腔体中浮力对流的分叉结构;绘制出几种典型情形的流线图和等温线图;讨论了对流模式的转换过程;对于几种较低的模式的转换,计算了临界瑞利数和临界宽高比。

关键词: 浮力对流, 渗流, 分叉, 模式转换

Abstract: The buoyancy convective flows in rectangular cross-section cavity of porous media saturated with fluid and heated form below are studied.The finite difference methods are used to study the bifuraction structure based on the bifurcation theory.Some typical figures of streamline and isotherm are given.The model exchange mechanisms of convection are discussed.Numenical results indude critical Rayleigh numbers and critical aspect ratios for exchange of some lower modes.

Key words: convective heat transfer, flow through porous media, bifurcation, model exchange

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