Low rayleigh number conjugate convection in straight inclined fractures in rock


Journal Article

This investigation explores the natural convection in a water-filled straight inclined fracture in rock subject to a uniform background temperature increasing with depth. The numerical solutions cover aspect ratios from 2 to SO, with Rayleigh numbers of magnitude I, 10, and 100. The inclination angle ranges from 0° to 90° to the horizontal. The results demonstrate that a straight inclined fracture experiences a gradient-driven convection flow whose strength is strongly dependent on aspect ratio. The flow increases as the fracture angle changes from either purely horizontal or purely vertical, with a maximum at 4S°. It is observed that fractures with an aspect ratio as low as 10 exhibit average velocities at the midplane of nearly 90% of the values calculated from the analytical solution for the infinite aspect ratio limit. © 1995 Taylor and Francis Group, LLC.

Full Text

Duke Authors

Cited Authors

  • Shaughnessy, EJ; Van Gilder, JW

Published Date

  • January 1, 1995

Published In

Volume / Issue

  • 28 / 4

Start / End Page

  • 389 - 408

Electronic International Standard Serial Number (EISSN)

  • 1521-0634

International Standard Serial Number (ISSN)

  • 1040-7782

Digital Object Identifier (DOI)

  • 10.1080/10407789508913752

Citation Source

  • Scopus