Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/106525
Title: | Simulation of natural convection and entropy generation of MHD non-Newtonian nanofluid in a cavity using Buongiorno's mathematical model | Authors: | Kefayati, GHR Tang, H |
Issue Date: | 6-Jul-2017 | Source: | International journal of hydrogen energy, 6 July 2017, v. 42, no. 27, p. 17284-17327 | Abstract: | In this paper, natural convection and entropy generation of non-Newtonian nanofluid, using the Buongiorno's mathematical model in a cavity in the presence of a uniform magnetic field has been analyzed by Finite Difference Lattice Boltzmann method (FDLBM). The cavity is filled with nanofluid which the mixture shows shear-thinning behavior. This study has been performed for the certain pertinent parameters of Rayleigh number (Ra = 104 and 105), Hartmann number (Ha = 0, 15, 30), buoyancy ratio number (Nr = 0.1, 1, and 4), power-law index (n = 0.4–1), Lewis number (Le = 1, 5, and 10), Thermophoresis parameter (Nt = 0.1, 0.5, 1), and Brownian motion parameter (Nb = 0.1, 1, 5). The Prandtl number is fixed at Pr = 1. The Results indicate that the augmentation of Hartmann number causes heat and mass transfer to drop. The increase in Rayleigh number enhances heat and mass transfer for various power-law indexes. The alteration of the power-law index changes heat and mass transfer. In addition, the rise of Hartmann number declines the shear-thinning behavior. The increase in the Lewis number augments mass transfer while it causes heat transfer to drop. The rise of the Thermophoresis and Brownian motion parameters ameliorate mass transfer and declines heat transfer significantly. The augmentation of buoyancy ratio number enhances heat and mass transfer. The augmentation of the power-law index declines various entropy generations in different Rayleigh numbers and Hartmann numbers. The increase in Hartmann number declines total entropy generation in different Rayleigh numbers. In addition, the rise of Rayleigh number and Hartmann number causes Bejan number to drop in various power-law indexes. The enhancement of the Lewis number provokes the total irreversibility to rise. Further, the total entropy generation increases as the buoyancy ratio number augments. It was shown that the increase in the Brownian motion and Thermophoresis parameters enhance the total irreversibility. | Keywords: | Buongiorno model Entropy FDLBM MHD Natural convection Non-Newtonian nanofluid |
Publisher: | Elsevier Ltd | Journal: | International journal of hydrogen energy | ISSN: | 0360-3199 | EISSN: | 1879-3487 | DOI: | 10.1016/j.ijhydene.2017.05.093 | Rights: | © 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Kefayati, G. H. R., & Tang, H. (2017). Simulation of natural convection and entropy generation of MHD non-Newtonian nanofluid in a cavity using Buongiorno's mathematical model. International Journal of Hydrogen Energy, 42(27), 17284-17327 is available at https://doi.org/10.1016/j.ijhydene.2017.05.093. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Tang_Simulation_Natural_Convection.pdf | Pre-Published version | 908.91 kB | Adobe PDF | View/Open |
Page views
9
Citations as of Jun 30, 2024
Downloads
1
Citations as of Jun 30, 2024
SCOPUSTM
Citations
62
Citations as of Jul 4, 2024
WEB OF SCIENCETM
Citations
55
Citations as of Jul 4, 2024
![](/image/google_scholar.jpg)
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.