Natural convection in an enclosure with discrete heat sources on the vertical walls

A. Hadim, M. Ramot

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

A numerical study of laminar natural convection in a discretely heated cavity is conducted for the case when two isothermal heat sources are located on the vertical walls, facing each other. The effects of the location of each heat source on the flow and heat transfer in the enclosure were examined for various Rayleigh numbers in the range 103<Ra<105. Two cases were studied. In the first case, as one heat source was moved from the bottom to the top of the isothermal cold wall while the other heat source was kept at the middle of the insulated wall, the average Nusselt number decreased to a minimum value which occurred when the heat source was in the bottom half of the cold wall, then Nu increased to a maximum when the heat source was located at the top of the cold wall. In the second case, one heat source was moved along the insulated wall while the other heat source was kept at the middle of the isothermal cold wall. The average Nusselt number increased to a maximum when the heat source was moved upward along the bottom half of the insulated left wall, then Nu decreased to a minimum as the heat source was moved to the top of the left wall. Higher circulation rates were obtained in the first case, and in each case, the maximum circulation rate occurred when the heat source was located at the bottom of its corresponding wall.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalAmerican Society of Mechanical Engineers (Paper)
StatePublished - 1993
EventProceedings of the ASME Winter Conference - New Orleans, LA, USA
Duration: 28 Nov 19933 Dec 1993

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