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Natural Convection in Rectangular Cavities at Various Aspect Ratios and Inclinations With Isothermal Sidewalls and Constant Flux Heat Source on the Bottom Wall

[+] Author Affiliations
M. A. R. Sharif, Taqui-ur-Rahman Mohammed

University of Alabama, Tuscaloosa, AL

Paper No. HT-FED2004-56092, pp. 233-239; 7 pages
doi:10.1115/HT-FED2004-56092
From:
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 2, Parts A and B
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4691-1 | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME

abstract

Natural convection in rectangular cavities is studied numerically using a finite volume based computational procedure. In many applications, especially for cooling of electronic components, a natural convection configuration is encountered where the heat source is at the bottom surface and the sidewalls are at colder temperature while the top wall can be considered adiabatic. The present study is based on such a configuration where a constant flux heat source is symmetrically embedded at the bottom wall. The non-heated parts of the bottom wall are considered adiabatic. The study includes computations for cavities at various aspect ratios, ranging from 0.5 to 2, and inclination angles of the cavity from 0° to 30°. The Grashof number is varied from 103 to 106 . The effects of aspect ratio and inclination angles on the heat transfer process are analysed. Results are presented in the form of streamline and isotherm plots as well as the variation of the average Nusselt number and maximum temperature at the heat source surface under different conditions.

Copyright © 2004 by ASME

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