The paper presents a theoretical and experimental study of natural convection in a horizontal cavity which communicates laterally with a large reservoir. The cavity walls and the reservoir are at different temperatures. It is shown theoretically that the flow consists of a horizontal counterflow which penetrates the cavity over a distinct length. The penetration length is shown to be proportional to the cavity height and to the square root of the Rayleigh number based on cavity height and cavity-reservoir temperature difference. The validity of the theory is demonstrated on the basis of a flow visualization experiment. It is shown also that the Nusselt number for cavity-reservoir heat exchange is proportional to the square root of the Rayleigh number, and is relatively insensitive to the Prandtl number in the range 0. 7 to infinity . Refs.

Duke Authors

Cited Authors

  • Bejan, A; Kimura, S

Published Date

  • 1981

Published In

  • Journal of Fluid Mechanics

Volume / Issue

  • 103 /

Start / End Page

  • 465 - 478

Citation Source

  • SciVal