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Mixed Convection Boundary Layers with Prescribed Temperature in the Unsteady Stagnation Point Flow toward a Stretching Vertical Sheet

Author

Listed:
  • Nik Mohd Asri Nik Long
  • Lee Feng Koo
  • Tze Jin Wong
  • Melini Suali

Abstract

Mixed convection boundary layer caused by time-dependent velocity and the surface temperature in the two-dimensional unsteady stagnation point flow of an in-compressible viscous fluid over a stretching vertical sheet is studied. The transformed nonlinear boundary layer equations are solved numerically using the shooting technique in cooperation with Runge-Kutta-Fehlberg (RKF) method. Different step sizes are used ranging from 0.0001 to 1. Numerical results for the skin friction coefficient and local Nusselt number are presented for both assisting and opposing flows. It is found that the dual solutions exist for the opposing flow, whereas the solution is unique for the assisting flow. Important features of the flow characteristics are displayed graphically. Comparison with the existing results for the steady case show an excellent agreement.

Suggested Citation

  • Nik Mohd Asri Nik Long & Lee Feng Koo & Tze Jin Wong & Melini Suali, 2013. "Mixed Convection Boundary Layers with Prescribed Temperature in the Unsteady Stagnation Point Flow toward a Stretching Vertical Sheet," Mathematical Problems in Engineering, Hindawi, vol. 2013, pages 1-10, June.
    • Handle: RePEc:hin:jnlmpe:195360
    DOI: 10.1155/2013/195360
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