Applied Mathematics and Mechanics (English Edition) ›› 2016, Vol. 37 ›› Issue (5): 573-582.doi: https://doi.org/10.1007/s10483-016-2072-8

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Boundary layer flow of Oldroyd-B fluid by exponentially stretching sheet

T. HAYAT1,2, M. IMTIAZ1, A. ALSAEDI2   

  1. 1. Department of Mathematics, Quaid-i-Azam University, Islamabad 44000, Pakistan;
    2. Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
  • 收稿日期:2015-08-17 修回日期:2016-01-08 出版日期:2016-05-01 发布日期:2016-05-01
  • 通讯作者: M. IMTIAZ E-mail:mi_qau@yahoo.com

Boundary layer flow of Oldroyd-B fluid by exponentially stretching sheet

T. HAYAT1,2, M. IMTIAZ1, A. ALSAEDI2   

  1. 1. Department of Mathematics, Quaid-i-Azam University, Islamabad 44000, Pakistan;
    2. Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
  • Received:2015-08-17 Revised:2016-01-08 Online:2016-05-01 Published:2016-05-01
  • Contact: M. IMTIAZ E-mail:mi_qau@yahoo.com

摘要:

The present paper investigates the steady flow of an Oldroyd-B fluid. The fluid flow is induced by an exponentially stretched surface. Suitable transformations reduce a system of nonlinear partial differential equations to a system of ordinary differential equations. Convergence of series solution is discussed explicitly by a homotopy analysis method (HAM). Velocity, temperature and heat transfer rates are examined for different involved parameters through graphs. It is revealed that for a larger retardation time constant, the velocity is enhanced and the temperature is lowered. It is noted that relaxation time constant and the Prandtl number enhance the heat transfer rate.

关键词: homotopy analysis method (HAM), exponentially stretching sheet, Oldroyd-B fluid

Abstract:

The present paper investigates the steady flow of an Oldroyd-B fluid. The fluid flow is induced by an exponentially stretched surface. Suitable transformations reduce a system of nonlinear partial differential equations to a system of ordinary differential equations. Convergence of series solution is discussed explicitly by a homotopy analysis method (HAM). Velocity, temperature and heat transfer rates are examined for different involved parameters through graphs. It is revealed that for a larger retardation time constant, the velocity is enhanced and the temperature is lowered. It is noted that relaxation time constant and the Prandtl number enhance the heat transfer rate.

Key words: homotopy analysis method (HAM), Oldroyd-B fluid, exponentially stretching sheet

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