Title: Second-law-based analysis of laminar slip-flow boundary layer heat transfer over a flat-plate

Authors: Mortaza Yari, Sanaz Mirzaparikhany, Mohammad Sirousazar

Addresses: Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil 179, Iran. ' Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil 179, Iran. ' Faculty of Chemical Engineering, Urmia University of Technology, P.O. Box 57166-93187, Urmia, Iran; Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box: 14115-114, Tehran, Iran

Abstract: The aim of this paper is to investigate the entropy generation in a flow over a flat plate with slip-flow boundary layers. Laminar flow at steady state is considered with two different forms of thermal boundary conditions, i.e., constant heat flux and constant temperature at wall. The effects of viscous dissipation, velocity slip and temperature jump at wall have been taken into consideration. Entropy generation was shown to decrease with an increase in the value of K, while increasing Br, Br/φ and Pr results in increasing the entropy generation.

Keywords: laminar boundary layers; second law; thermodynamics; Knudsen number; slip-flow; temperature jump; heat transfer; flat plates; entropy generation; laminar flow; constant heat flux; constant temperature; viscous dissipation; velocity slip.

DOI: 10.1504/IJEX.2011.041029

International Journal of Exergy, 2011 Vol.8 No.4, pp.392 - 406

Published online: 28 Jun 2011 *

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