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Research Papers: Natural and Mixed Convection

Effect of Double Stratification on Free Convection in a Micropolar Fluid

[+] Author and Article Information
D. Srinivasacharya1

Department of Mathematics,  National Institute of Technology, Warangal 506004, Andhra Pradesh, Indiadsrinivasacharya@gmail.com

Ch. RamReddy

Department of Mathematics,  National Institute of Technology, Warangal 506004, Andhra Pradesh, Indiadsrinivasacharya@gmail.com

1

Corresponding author.

J. Heat Transfer 133(12), 122502 (Oct 03, 2011) (7 pages) doi:10.1115/1.4004449 History: Received October 07, 2009; Revised June 17, 2011; Published October 03, 2011; Online October 03, 2011

This paper analyzes the flow and heat and mass transfer characteristics of the free convection on a vertical plate with uniform and constant heat and mass fluxes in a doubly stratified micropolar fluid. The nonlinear governing equations and their associated boundary conditions are initially cast into dimensionless forms by pseudosimilarity variables. The resulting system of equations is then solved numerically using the Keller-box method. The numerical results are compared and found to be in good agreement with previously published results on special cases of the problem. The obtained results are displayed graphically to illustrate the effect of the micropolar and stratification parameters on the dimensionless velocity, microrotation, wall temperature, and wall concentration. The numerical values of the skin friction, wall couple stress, and heat and mass transfer rates for different values of governing parameters are also tabulated.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 4

(a) Velocity, (b) microrotation, (c) temperature, and (d) concentration profiles for various values of ɛ2

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Figure 3

(a) Velocity, (b) microrotation, (c) temperature, and (d) concentration profiles for various values of ɛ1

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Figure 2

(a) Velocity, (b) microrotation, (c) temperature, and (d) concentration profiles for various values of N

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Figure 1

Physical model and coordinate system

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