Heat transfer characteristics of a constant heat flux vertical plate in water

Harris Eze Imadojemu, R. R. Johnson

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Experimental examination of the heat transfer characteristics of a vertical plate in water is presented. Results are given as the variation of local Nusselt number with Rayleigh number for different heat fluxes. The experiments included temperature measurements and flow visualization by the use of the simple and precise method of electrochemical formation of dye technique. Arrangements were made so that color changes occured both at the surface of the vertical plate and within the boundary layer. The free convection heat transfer in water, as expressed by the power-law relationship between the Nusselt number and Rayleigh number, Nu = 0.89 Ra0.2, is shown to be adequate for the range of Rayleigh numbers 104 < Ra < 1013 for a constant heat flux boundary condition. There appear to be similarities in the mechanisms of transition from laminar to turbulent boundary layer flow between those for natural convection and those for the Blasius-type forced flow over a flat plate. The Emmons spot source band for natural convection flow is large when compared to the narrow band for Blasius flow.

Original languageEnglish (US)
Pages (from-to)13-21
Number of pages9
JournalExperimental Thermal and Fluid Science
Volume9
Issue number1
DOIs
StatePublished - Jan 1 1994

Fingerprint

Natural convection
Heat flux
Nusselt number
Heat transfer
Water
Boundary layer flow
Flow visualization
Temperature measurement
Boundary layers
Coloring Agents
Dyes
Boundary conditions
Color
Experiments

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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Heat transfer characteristics of a constant heat flux vertical plate in water. / Imadojemu, Harris Eze; Johnson, R. R.

In: Experimental Thermal and Fluid Science, Vol. 9, No. 1, 01.01.1994, p. 13-21.

Research output: Contribution to journalArticle

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