Natural convection heat transfer from horizontal heated plates in an enclosure (Effects of interval of heated plates on flow characteristics)

Rikio Shimoyama, Akira Sanada, Akihiko Horibe

Research output: Contribution to journalArticle

Abstract

In this paper, natural convection in an enclosure which two parallel heated plates are included is investigated experimentally. We consider the experimental model stated as follows : two heated plates arranged in the vertical direction : the surface of heated plates have constant heat flux : the temperature of ceiling is kept for cooling : the other sides have thermal insulation boundary condition. The relevance of the flow in the enclosure and the heat transfer characteristics from each heated surface was presented. In the area of between cooled ceiling and heated surface, vortex motion arises when the ascending flow from the upper plates and the accompanying flow to the rising flow from lower area are interfered. Heat transfer around heated surface is enhanced by the vortex motion. In the other areas, the flow is circulated along the heated surface, and average Nusselt number is proportional to modified Rayleigh number at the power in general.

Original languageEnglish
Pages (from-to)625-633
Number of pages9
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume76
Issue number764
Publication statusPublished - Apr 2010
Externally publishedYes

Fingerprint

flow characteristics
enclosure
Enclosures
Natural convection
free convection
heat transfer
Heat transfer
intervals
ceilings
Ceilings
Vortex flow
vortices
thermal insulation
Thermal insulation
Rayleigh number
Nusselt number
parallel plates
Heat flux
heat flux
Boundary conditions

Keywords

  • Enclosure
  • Flow visualization
  • Heat transfer
  • Heat transfer design
  • Natural convection
  • Parallel heated plates

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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abstract = "In this paper, natural convection in an enclosure which two parallel heated plates are included is investigated experimentally. We consider the experimental model stated as follows : two heated plates arranged in the vertical direction : the surface of heated plates have constant heat flux : the temperature of ceiling is kept for cooling : the other sides have thermal insulation boundary condition. The relevance of the flow in the enclosure and the heat transfer characteristics from each heated surface was presented. In the area of between cooled ceiling and heated surface, vortex motion arises when the ascending flow from the upper plates and the accompanying flow to the rising flow from lower area are interfered. Heat transfer around heated surface is enhanced by the vortex motion. In the other areas, the flow is circulated along the heated surface, and average Nusselt number is proportional to modified Rayleigh number at the power in general.",
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