Effect of material anisotropy on the onset of convective flow in three-dimensional fluid-saturated faults

Zhao, CB, Hobbs, BE, Ord, A, Muhlhaus, HB and Lin, G (2003) Effect of material anisotropy on the onset of convective flow in three-dimensional fluid-saturated faults. Mathematical Geology, 35 2: 141-154.


Author Zhao, CB
Hobbs, BE
Ord, A
Muhlhaus, HB
Lin, G
Title Effect of material anisotropy on the onset of convective flow in three-dimensional fluid-saturated faults
Journal name Mathematical Geology   Check publisher's open access policy
ISSN 0882-8121
Publication date 2003
Sub-type Article (original research)
DOI 10.1023/A:1023283421049
Volume 35
Issue 2
Start page 141
End page 154
Total pages 14
Place of publication New York
Publisher Kluwer Academic/plenum Publ
Language eng
Abstract In order to investigate the effect of material anisotropy on convective instability of three-dimensional fluid-saturated faults, an exact analytical solution for the critical Rayleigh number of three-dimensional convective flow has been obtained. Using this critical Rayleigh number, effects of different permeability ratios and thermal conductivity ratios on convective instability of a vertically oriented three-dimensional fault have been examined in detail. It has been recognized that (1) if the fault material is isotropic in the horizontal direction, the horizontal to vertical permeability ratio has a significant effect on the critical Rayleigh number of the three-dimensional fault system, but the horizontal to vertical thermal conductivity ratio has little influence on the convective instability of the system, and (2) if the fault material is isotropic in the fault plane, the thermal conductivity ratio of the fault normal to plane has a considerable effect on the critical Rayleigh number of the three-dimensional fault system, but the effect of the permeability ratio of the fault normal to plane on the critical Rayleigh number of three-dimensional convective flow is negligible.
Keyword Mathematics, Interdisciplinary Applications
Geosciences, Multidisciplinary
Convective Instability
Critical Rayleigh Number
Three-dimensional Fault
Material Anisotropy
Analytical Solution
Porous-media
Box
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Earth Systems Science Computational Centre Publications
 
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Created: Mon, 13 Aug 2007, 13:30:19 EST