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Numerical investigation for second law analysis of ferrofluid inside a porous semi annulus: An application of entropy generation and exergy loss

M. Sheikholeslami (Department of Mechanical Engineering, Noshiravni University of Technology, Babol, Iran and Renewable Energy Systems and Nanofluid Applications in Heat Transfer Laboratory, Babol Noshirvani University of Technology, Babol, Iran)
R. Ellahi (Center for Modeling and Computer Simulation, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia and Department of Mathematics and Statistics, IIUI, Islamabad, Pakistan)
Ahmad Shafee (Department of Applied Education, College of Technological Studies, Shuwaikh, Kuwait, and FAST, University Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat, Johor State, Malaysia)
Zhixiong Li (School of Engineering, Ocean University of China, Qingdao, China and School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, Australia)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 23 January 2019

Issue publication date: 22 February 2019

580

Abstract

Purpose

The purpose of this paper is to present the entropy analysis of ferrofluid inside a porous space with magnetic force. Homogenous model with second law analysis is also taken into account.

Design/methodology/approach

Innovative model has been proposed and designed using control volume finite element method.

Findings

Experimental results demonstrate that Bejan number augments with augment of Rayleigh. As Hartmann number rises, exergy loss enhances. Exergy loss increases by increasing Hartmann number, whereas magnetic entropy generation reduces with the decrease of Ha. The proposed model can be used for combustion process and optimizing the performance of energy conversion system like gas turbine.

Originality/value

To the best of authors’ knowledge, this model is reported for the first time.

Keywords

Acknowledgements

Current article was supported by the National Sciences Foundation of China (NSFC) (No. U1610109), UOW Vice-Chancellor’s Postdoctoral Research Fellowship. Also, the authors acknowledge the funding support of Babol Noshirvani University of Technology through Grant Program No. BNUT/390051/97.

Citation

Sheikholeslami, M., Ellahi, R., Shafee, A. and Li, Z. (2019), "Numerical investigation for second law analysis of ferrofluid inside a porous semi annulus: An application of entropy generation and exergy loss", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 29 No. 3, pp. 1079-1102. https://doi.org/10.1108/HFF-10-2018-0606

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited

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