期刊
AIN SHAMS ENGINEERING JOURNAL
卷 4, 期 4, 页码 933-938出版社
ELSEVIER
DOI: 10.1016/j.asej.2013.04.004
关键词
Unsteady flow; Casson fluid; Stretching surface; Heat transfer
资金
- UGC, New Delhi, India
The unsteady two-dimensional flow of a non-Newtonian fluid over a stretching surface having a prescribed surface temperature is investigated. The Casson fluid model is used to characterise the non-Newtonian fluid behaviour. Similarity transformations are employed to transform the governing partial differential equations into ordinary differential equations. The transformed equations are then solved numerically by shooting method. Exact solution corresponding to momentum equation for steady case is obtained. The flow features and heat transfer characteristics for different values of the governing parameters viz. unsteadiness parameter, Casson parameter and Prandtl number are analysed and discussed in detail. Fluid velocity initially decreases with increasing unsteadiness parameter and temperature decreases significantly due to unsteadiness. The effect of increasing values of the Casson parameter is to suppress the velocity field. But the temperature is enhanced with increasing Casson parameter. (C) 2013 Ain Shams University. Production and hosting by Elsevier B.V. All rights reserved.
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