On the mixed convection boundary-layer flow about a solid sphere with constant surface temperature

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

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The steady mixed convection boundary-layer flow of an incompressible viscous fluid about a solid sphere with constant surface temperature is considered for both aiding and opposing flow cases. The transformed conservation equations of the non-similar boundary-layers are solved numerically using a very efficient finite-difference method known as Keller-box scheme. Numerical results are presented for different values of the mixed convection parameter λ, with the Prandtl number Pr = 0.7 (air) and Pr = 6.8 (water at 21°C), respectively. It is found that aiding flow (λ > 0) delays separation of the boundary-layer and can, if the aiding flow is strong enough, suppress it completely. The opposing flow (λ < 0), on the other hand, brings the separation point nearer to the lower stagnation point of the sphere and for sufficiently strong opposing flows there will not be a boundary-layer on the sphere. Some results were given in the form of tables. Such tables are very important and they can serve as a reference against which other exact or approximate solutions can be compared in the future.

Original languageEnglish
Pages (from-to)117-135
Number of pages19
JournalArabian Journal for Science and Engineering
Volume27
Issue number2 C
Publication statusPublished - Dec 2002
Externally publishedYes

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surface temperature
boundary layer
convection
twenty first century
finite difference method
fluid
air
water

Keywords

  • Boundary-layer
  • Constant surface temperature
  • Mixed convection
  • Numerical results

ASJC Scopus subject areas

  • General

Cite this

On the mixed convection boundary-layer flow about a solid sphere with constant surface temperature. / Mohd. Nazar, Roslinda; Amin, N.; Pop, I.

In: Arabian Journal for Science and Engineering, Vol. 27, No. 2 C, 12.2002, p. 117-135.

Research output: Contribution to journalArticle

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