Control of Rayleigh-Bénard convection in a small aspect ratio container

Journal Article (Journal Article)

Active control of Rayleigh-Bénard convection in small aspect ratio horizontal layer, by perturbation of the lower thermal boundary condition, is shown. These experiments use a novel shadowgraphic system to measure the departure of a high Prandtl number fluid from the no-motion state. A proportional control scheme uses the shadowgraphic information as feedback to determine the lower boundary heat flux distribution. An array of individually controlled heaters imposes the heating distribution. Significant suppression of the convection amplitude is possible to at least 10 times the critical Rayleigh number. This convection control method provides an economical alternative to magnetic convection suppression. Copyright © 1996 Elsevier Science Ltd.

Full Text

Duke Authors

Cited Authors

  • Howle, LE

Published Date

  • January 1, 1997

Published In

Volume / Issue

  • 40 / 4

Start / End Page

  • 817 - 822

International Standard Serial Number (ISSN)

  • 0017-9310

Digital Object Identifier (DOI)

  • 10.1016/0017-9310(96)00174-3

Citation Source

  • Scopus