Temperature profile of a power-law fluid over a moving wall with arbitrary injection/suction and internal heat generation/absorption

Document Type : Full Lenght Research Article

Authors

1 university of isfahan

2 University of Isfahan

Abstract

The heat transfer for a non-Newtonian power-law fluid over a moving surface is investigated by applying a uniform suction/injection velocity profile. The flow is influenced by internal heat generation/absorption. The energy equation is solved at constant surface temperature condition. The Merk-Chao series is applied to obtain a set of ODEs instead of a complicated PDE. The converted ordinary differential equations are solved numerically, adopting the fourth order Runge–Kutta method coupled with the shooting technique. The effects of the fluid type, suction/injection and heat source/sink parameters on heat-transfer are discussed. It is observed that thermal boundary layers for pseudo plastic fluids are thicker than that of the dilatants. There exists a direct relation between dimensionless temperature and the injection parameter or the heat generation parameter rise. Injection of a fluid to the surface generates more flow penetration into the fluid, which causes an increase in the thermal boundary layer and the temperature.

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References

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History

  • Receive Date: 15 April 2016
  • Revise Date: 13 January 2017
  • Accept Date: 14 January 2017

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