Mixed convection in a rectangular channel flow with smooth surfaces and one heated wall.

R. N. Christensen, D. W. Gear, F. A. Kulacki

Research output: Contribution to journalArticlepeer-review

Abstract

Temperature distributions and heat transfer coefficients are determined experimentally for flow conditions similar to those in proposed nuclear waste repositories. Investigations were performed for continuous and discrete heat flux distributions in one heated wall for Reynolds numbers between 1600 and 88,700. For the modeled flow conditions, it is found that all local heat transfer coefficients and Nusselt numbers approach an asymptotic value in the test apparatus over the range of Reynolds numbers studied. The asymptotic Nusselt numbers for discrete heating are approximately twice those for continuous heating. The asymptotic Nusselt numbers for continuous heating are up to three times greater than those expected in conventional forced convection, but agree favorably with those expected for mixed convection. A correlation for Nusselt numbers is presented for the modeled flow regime for Reynolds numbers between 1600 and 88,700. (A)

Original languageEnglish (US)
Journal[No source information available]
StatePublished - Jan 1 1981

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