Next Article in Journal
A Forecasting Model Based on High-Order Fluctuation Trends and Information Entropy
Next Article in Special Issue
Entropy Generation Rates in Two-Dimensional Rayleigh–Taylor Turbulence Mixing
Previous Article in Journal
Application of Mutual Information-Sample Entropy Based MED-ICEEMDAN De-Noising Scheme for Weak Fault Diagnosis of Hoist Bearing
Previous Article in Special Issue
Second Law Analysis of Dissipative Flow over a Riga Plate with Non-Linear Rosseland Thermal Radiation and Variable Transport Properties
Article Menu
Issue 9 (September) cover image

Export Article

Open AccessArticle
Entropy 2018, 20(9), 668; https://doi.org/10.3390/e20090668

Transpiration and Viscous Dissipation Effects on Entropy Generation in Hybrid Nanofluid Flow over a Nonlinear Radially Stretching Disk

1
Department of Mathematics, Faculty of Science, Jiangsu University, Zhenjiang 212013, China
2
Department of Mathematics, COMSATS University Islamabad, Park Road, Tarlai Kalan, Islamabad 455000, Pakistan
*
Authors to whom correspondence should be addressed.
Received: 1 July 2018 / Revised: 14 August 2018 / Accepted: 17 August 2018 / Published: 4 September 2018
(This article belongs to the Special Issue Entropy Generation and Heat Transfer)
Full-Text   |   PDF [7130 KB, uploaded 4 September 2018]   |  

Abstract

The present research work explores the effects of suction/injection and viscous dissipation on entropy generation in the boundary layer flow of a hybrid nanofluid (Cu–Al2O3–H2O) over a nonlinear radially stretching porous disk. The energy dissipation function is added in the energy equation in order to incorporate the effects of viscous dissipation. The Tiwari and Das model is used in this work. The flow, heat transfer, and entropy generation analysis have been performed using a modified form of the Maxwell Garnett (MG) and Brinkman nanofluid model for effective thermal conductivity and dynamic viscosity, respectively. Suitable transformations are utilized to obtain a set of self-similar ordinary differential equations. Numerical solutions are obtained using shooting and bvp4c Matlab solver. The comparison of solutions shows excellent agreement. To examine the effects of principal flow parameters like suction/injection, the Eckert number, and solid volume fraction, different graphs are plotted and discussed. It is concluded that entropy generation inside the boundary layer of a hybrid nanofluid is high compared to a convectional nanofluid. View Full-Text
Keywords: hybrid nanofluid; entropy generation; Bejan number; nonlinear stretching; porous disk; viscous dissipation hybrid nanofluid; entropy generation; Bejan number; nonlinear stretching; porous disk; viscous dissipation
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Farooq, U.; Afridi, M.I.; Qasim, M.; Lu, D.C. Transpiration and Viscous Dissipation Effects on Entropy Generation in Hybrid Nanofluid Flow over a Nonlinear Radially Stretching Disk. Entropy 2018, 20, 668.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top