Flow reversal and heat transfer of fully developed mixed convection in vertical channels

Chin Hsiang Cheng, Hong Sen Kou, Wen Hsiung Huang

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

The present analysis is concerned with flow reversal phenomena and heat transfer characteristics of the fully developed laminar combined free and forced convection in the heated vertical channels. Three fundamental combinations of thermal boundary conditions on the respective wall surface (namely isoflux-isoflux, isofluxisothernial, and isothermal-isothermal) are considered separately so as to investigate extensively their distinct influence on the flow pattern. Results of the velocity distribution and temperature distribution as well as the Nusselt number in terms of bulk mean temperature are carried out. Based on the analytical solutions obtained, flow reversal adjacent to the relatively colder wall is found to exist within the channel as Re/Gr is below than a threshold value, which is related to the thermal boundary conditions. Parameter zones for the occurrence of reversed flow are presented. Comparisons and verification are made using the existing numerical solutions at locations far downstream of developing flow.

Original languageEnglish
Pages (from-to)375-383
Number of pages9
JournalJournal of thermophysics and heat transfer
Volume4
Issue number3
DOIs
Publication statusPublished - 1990

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Space and Planetary Science

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