Mixed convection boundary-layer flow from a horizontal circular cylinder with a constant surface heat flux

Roslinda Mohd. Nazar, N. Amin, I. Pop

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The laminar mixed convection boundary-layer flow of a viscous and incompressible fluid past a horizontal circular cylinder, which is maintained at a constant heat flux and is placed in a stream flowing vertically upward has been theoretically studied in this paper. The solutions for the flow and heat transfer characteristics are evaluated numerically for different values of the mixed convection parameter λ with the Prandtl number Pr = 1 and 7, respectively. It is found, as for the case of a heated or cooled cylinder, considered by Merkin [5], that assisting flow delays separation of the boundary-layer and can, if the assisting flow is strong enough, suppress it completely. The opposing flow, on the other side, brings the separation point nearer to the lower stagnation point and for sufficiently strong opposing flows there will not be a boundary-layer on the cylinder.

Original languageEnglish
Pages (from-to)219-227
Number of pages9
JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
Volume40
Issue number3-4
DOIs
Publication statusPublished - Feb 2004
Externally publishedYes

Fingerprint

Mixed convection
boundary layer flow
Boundary layer flow
circular cylinders
Circular cylinders
Heat flux
heat flux
Boundary layers
convection
Prandtl number
Heat transfer
boundary layers
Fluids
stagnation point
incompressible fluids
viscous fluids
heat transfer

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Cite this

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AU - Amin, N.

AU - Pop, I.

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AB - The laminar mixed convection boundary-layer flow of a viscous and incompressible fluid past a horizontal circular cylinder, which is maintained at a constant heat flux and is placed in a stream flowing vertically upward has been theoretically studied in this paper. The solutions for the flow and heat transfer characteristics are evaluated numerically for different values of the mixed convection parameter λ with the Prandtl number Pr = 1 and 7, respectively. It is found, as for the case of a heated or cooled cylinder, considered by Merkin [5], that assisting flow delays separation of the boundary-layer and can, if the assisting flow is strong enough, suppress it completely. The opposing flow, on the other side, brings the separation point nearer to the lower stagnation point and for sufficiently strong opposing flows there will not be a boundary-layer on the cylinder.

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