Title: Second law analysis in the peristaltic flow of variable viscosity fluid

Authors: Sufian Munawar; Najma Saleem; Khalid Aboura

Addresses: Department of Quantitative Methods, College of Business Administration, University of Dammam, Dammam, 31441, Saudi Arabia ' Department of Mathematics and Natural Sciences, Prince Mohammad Bin Fahd University, Khobar, 31952, Saudi Arabia ' Department of Quantitative Methods, College of Business Administration, University of Dammam, Dammam, 31441, Saudi Arabia

Abstract: In this paper, a complete thermodynamical analysis has been made for the peristaltic motion of a viscous fluid with variable viscosity in a symmetric channel. The entire study is carried out in a moving frame of reference. The governing equations are normalised and exact solutions are obtained. The causes of entropy production in the peristaltic motion have been examined. Graphical illustrations of the total entropy generation number and the Bejan number have been provided and effects of pertinent parameters of interest are discussed. It is established that the entropy generation is minimum in the expanding region of the channel. Moreover, the fluids with variable viscosity with low viscous dissipation can be helpful in minimising the entropy generation.

Keywords: entropy generation; peristaltic flow; symmetric channels; variable viscosity; viscous fluids; entropy production; thermodynamics.

DOI: 10.1504/IJEX.2016.076862

International Journal of Exergy, 2016 Vol.20 No.2, pp.170 - 185

Received: 09 May 2015
Accepted: 01 Jul 2015
Published online: 04 Jun 2016 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article