Stability of Natural Convection of Power-law Fluid and non-Darcy Flow in Porous Media

• 来源期刊: 热科学学报（英文版）
• 学科: 工学
• 年，卷（期）: 2001,（1）
• 页码范围: 74-78
• 页数: 5页
• 分类号: TK1
• 语种: 英文

摘要

In the present work the effect of the power law exponent of power-law fluid and non-Darcy number of non-Darcy flow on stability of natural convection in porous media are studied. The computation analysis of effect of power law exponent of power-law fluid and non-Darcy number of non-Darcy flow in the rectangular duct on the transition Rayleigh number Ra*, which means the convective model transiting from stationary state to periodic solution. The duct has filled a porous medium saturated with the power-law non-Newtonian fluid or Newtonian fluid for non-Darcy flow, in which there is uniform internal heat generation per unit volume q. In this paper the relationship between the transition Rayleigh number Ra* and the power-law exponent n, Ra* and non-Darcy number Be, are shown .To these two aspects, the transition route from steady to chaotic convection is also obtained.