Natural convection in a horizontal fluid layer with volumetric energy sources

F. A. Kulacki, M. E. Nagle

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

Natural convection with volumetric heating in a horizontal fluid layer with a rigid, insulated lower boundary and a rigid, isothermal upper boundary is experimentally investigated for Rayleigh numbers from 114 to 1.8 × 106 times the critical value of linear stability theory. Joule heating by alternating current passing horizontally through the layer provides the volumetric energy source. Layer aspect ratios are kept small to minimize the effects of side walls. A correlation for mean Nusselt number is obtained for steady heat transfer, and data are presented on fluctuating temperatures at high Rayleigh numbers and on developing temperature distributions when the layer is subjected to a step change in power.

Original languageEnglish (US)
Pages (from-to)204-211
Number of pages8
JournalJournal of Heat Transfer
Volume97
Issue number2
DOIs
StatePublished - May 1975

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