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Research Papers: Heat and Mass Transfer

Analysis of Entropy Generation Due to Micropolar Fluid Flow in a Rectangular Duct Subjected to Slip and Convective Boundary Conditions

[+] Author and Article Information
D. Srinivasacharya

Department of Mathematics,
National Institute of Technology,
Warangal 506004, India
e-mails: dsc@nitw.ac.in;
dsrinivasacharya@yahoo.com

K. Himabindu

Department of Mathematics,
National Institute of Technology,
Warangal 506004, India

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received March 12, 2016; final manuscript received February 5, 2017; published online April 4, 2017. Assoc. Editor: Amitabh Narain.

J. Heat Transfer 139(7), 072003 (Apr 04, 2017) (9 pages) Paper No: HT-16-1131; doi: 10.1115/1.4036077 History: Received March 12, 2016; Revised February 05, 2017

The entropy generation due to steady, incompressible micropolar fluid flow in a rectangular duct with slip and convective boundary conditions (CBCs) is calculated. An external uniform magnetic field is applied which is directed arbitrarily in a plane perpendicular to the flow direction. The governing partial differential equations of momentum, angular momentum, and energy are solved numerically using finite-difference method. The obtained velocity, microrotation, and temperature distributions are then used to evaluate the entropy generation and Bejan number. The effects of various parameters on the entropy generation and Bejan number are discussed through graphs.

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References

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Figures

Grahic Jump Location
Fig. 1

Schematic diagram of the problem

Grahic Jump Location
Fig. 2

Three-dimensional profiles of entropy generation and Bejan number

Grahic Jump Location
Fig. 3

Effect of coupling number on entropy generation and Bejan number

Grahic Jump Location
Fig. 4

Effect of Hartman number on entropy generation and Bejan number

Grahic Jump Location
Fig. 5

Effect of Reynolds number on entropy generation and Bejan number

Grahic Jump Location
Fig. 6

Effect of slip parameter on entropy generation and Bejan number

Grahic Jump Location
Fig. 7

Effect of Biot number on entropy generation and Bejan number

Grahic Jump Location
Fig. 8

Effect of Brinkman number on entropy generation and Bejan number

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