Applied Mathematics and Mechanics (English Edition) ›› 2016, Vol. 37 ›› Issue (12): 1587-1596.doi: https://doi.org/10.1007/s10483-016-2141-8

• 论文 •    下一篇

Heat transfer characteristics of thin power-law liquid films over horizontal stretching sheet with internal heating and variable thermal coefficient

Yanhai LIN1, Liancun ZHENG2, Lianxi MA3   

  1. 1. School of Mathematical Sciences, Huaqiao University, Quanzhou 362021, Fujian Province, China;
    2. School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China;
    3. Department of Physics, Blinn College, Bryan, TX 77805, U. S. A
  • 收稿日期:2016-02-01 修回日期:2016-07-04 出版日期:2016-12-01 发布日期:2016-12-01
  • 通讯作者: Yanhai LIN E-mail:linyanhai999@hqu.edu.cn
  • 基金资助:

    Project supported by the Scientific Research Funds of Huaqiao University (No. 14BS310) and the National Natural Science Foundation of China (Nos. 51276014 and 51476191)

Heat transfer characteristics of thin power-law liquid films over horizontal stretching sheet with internal heating and variable thermal coefficient

Yanhai LIN1, Liancun ZHENG2, Lianxi MA3   

  1. 1. School of Mathematical Sciences, Huaqiao University, Quanzhou 362021, Fujian Province, China;
    2. School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China;
    3. Department of Physics, Blinn College, Bryan, TX 77805, U. S. A
  • Received:2016-02-01 Revised:2016-07-04 Online:2016-12-01 Published:2016-12-01
  • Contact: Yanhai LIN E-mail:linyanhai999@hqu.edu.cn
  • Supported by:

    Project supported by the Scientific Research Funds of Huaqiao University (No. 14BS310) and the National Natural Science Foundation of China (Nos. 51276014 and 51476191)

摘要:

The effect of internal heating source on the film momentum and thermal transport characteristic of thin finite power-law liquids over an accelerating unsteady horizontal stretched interface is studied. Unlike most classical works in this field, a general surface temperature distribution of the liquid film and the generalized Fourier's law for varying thermal conductivity are taken into consideration. Appropriate similarity transformations are used to convert the strongly nonlinear governing partial differential equations (PDEs) into a boundary value problem with a group of two-point ordinary differential equations (ODEs). The correspondence between the liquid film thickness and the unsteadiness parameter is derived with the BVP4C program in MATLAB. Numerical solutions to the self-similarity ODEs are obtained using the shooting technique combined with a Runge-Kutta iteration program and Newton's scheme. The effects of the involved physical parameters on the fluid's horizontal velocity and temperature distribution are presented and discussed.

关键词: internal heating, non-Newtonian fluid, thermal conductivity, thin film, heat transfer, numerical solution, nonlinear equation, stretching sheet

Abstract:

The effect of internal heating source on the film momentum and thermal transport characteristic of thin finite power-law liquids over an accelerating unsteady horizontal stretched interface is studied. Unlike most classical works in this field, a general surface temperature distribution of the liquid film and the generalized Fourier's law for varying thermal conductivity are taken into consideration. Appropriate similarity transformations are used to convert the strongly nonlinear governing partial differential equations (PDEs) into a boundary value problem with a group of two-point ordinary differential equations (ODEs). The correspondence between the liquid film thickness and the unsteadiness parameter is derived with the BVP4C program in MATLAB. Numerical solutions to the self-similarity ODEs are obtained using the shooting technique combined with a Runge-Kutta iteration program and Newton's scheme. The effects of the involved physical parameters on the fluid's horizontal velocity and temperature distribution are presented and discussed.

Key words: thermal conductivity, thin film, non-Newtonian fluid, nonlinear equation, internal heating, stretching sheet, heat transfer, numerical solution

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