Flow and heat transfer characteristics of the boundary layers over a stretching surface with a uniform-shear free stream

  • Fang T
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In this work, the momentum and thermal boundary layers over a continuously stretching surface with a uniform-shear free stream were investigated. Based oil the boundary layer assumptions, the similarity equations were obtained, which were solved numerically. Theoretical analysis was conducted for certain special conditions. The solution domain for the momentum boundary layer was theoretically estimated and compared with the numerical results. It is found that the interaction of uniform-shear free stream and the wall stretching velocity greatly affects the fluid motion and heat transfer characteristics. Dual Solutions exist for the stretching parameter gamma > gamma(c) = -0.596985. There is one solution for gamma = y(c) and no solution for gamma < gamma(c). The effects of the Prandtl number, Pr, the temperature power index, m, and the wall stretching parameter, gamma, oil the heat transfer behaviors were analyzed and discussed. A general exact analytical solution of thermal boundary layers was derived for non-stretching wall condition with gamma = 0 and arbitrary values of Pr and gamma. Analytical solutions were also given for m = -2/3 and m = 0 with arbitrary values of Pr and m. Interesting observations were found for negative wall stretching parameter, negative temperature power index, and the lower solution branch. (C) 2007 Elsevier Ltd. All rights reserved.

Author-supplied keywords

  • airy wall-jet
  • continuous solid surfaces
  • driven flow
  • equations
  • flux
  • momentum
  • moving surface
  • power-law shear
  • power-law shear flow
  • semiinfinite flat-plate
  • similarity solution
  • stretching surface
  • temperature
  • uniform-shear free stream

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  • T Fang

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