High Rayleigh number convection in a fluid overlaying a porous bed

A series of numerical experiments concerning the phenomenon of natural convection in a two-layer composite system heated from below is reported. The composite system consists of a fluid layer bounded from below by a porous bed saturated by the same fluid. The numerical solutions are based on the full equations for time-dependent flow, and document the main features of the flow at Rayleigh numbers several orders of magnitude above critical value. The ranges covered by the numerical solutions are 102-106 for overall Rayleigh number, 10-7-10-4 for Darcy number, and 0.2-1 for the height to length ratio of the composite system. © 1986.

Duke Authors

Cited Authors

  • Poulikakos, D; Bejan, A; Selimos, B; Blake, KR

Published Date

  • 1986

Published In

Volume / Issue

  • 7 / 2

Start / End Page

  • 109 - 116

International Standard Serial Number (ISSN)

  • 0142-727X

Citation Source

  • SciVal