Stability of natural convection in superposed fluid and porous layers using integral transforms

被引：24
|
作者：
Hirata, S. C.
Goyeau, B.
Gobin, D.
Cotta, R. M.
机构：
[1] Univ Paris 06, CNRS, UMR 7608, FAST, F-91405 Orsay, France
[2] Univ Paris 11, F-91405 Orsay, France
[3] UFRJ, COPPE, EE, Rio De Janeiro, Brazil
来源：
NUMERICAL HEAT TRANSFER PART B-FUNDAMENTALS | 2006年 / 50卷 / 05期
关键词：
D O I：
10.1080/10407790600682730
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A stability analysis of thermal natural convection in superposed fluid and porous layers is carried out. The two-layer system is described using a one-domain formulation, and the eigenvalue problem resulting from the stability analysis is solved using the generalized integral transform technique (GITT). The numerical results confirm that the onset of convection can have a bimodal nature depending on the depth ratio. The influence of the dimensionless permeability and thermal diffusivity ratio are investigated.
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页码：409 / 424
页数：16
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