Ternary hybrid-nanofluid magneto-convective flow inside the octagonal enclosure with an inner circular obstacle contribution to entropy generation

Moon, NJ; Saha, BK; Jihan, JI; Saha, G; Alam, MN; Saha, SC

Ternary hybrid-nanofluid magneto-convective flow inside the octagonal enclosure with an inner circular obstacle contribution to entropy generation

Moon, NJ Saha, BK Jihan, JI Saha, G

Alam, MN Saha, SC

Permalink

Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: International Journal of Thermofluids, 2025, 30, pp. 101480
Issue Date:: 2025-11-01

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Adobe PDF

Download Published versionAdobe PDF (24.05 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Moon, NJ
dc.contributor.author	Saha, BK
dc.contributor.author	Jihan, JI
dc.contributor.author	Saha, G https://orcid.org/0000-0001-6467-298X
dc.contributor.author	Alam, MN
dc.contributor.author	Saha, SC
dc.date.accessioned	2025-12-19T04:32:38Z
dc.date.available	2025-12-19T04:32:38Z
dc.date.issued	2025-11-01
dc.identifier.citation	International Journal of Thermofluids, 2025, 30, pp. 101480
dc.identifier.issn	2666-2027
dc.identifier.issn	2666-2027
dc.identifier.uri	http://hdl.handle.net/10453/191028
dc.description.abstract	Natural convection (NC) plays a pivotal role in convective heat transfer (HT) and has been extensively studied. This research focuses on examining the impact of different parameters on HT and fluid flow behavior of a ternary hybrid nanofluid (Al<inf>2</inf>O<inf>3</inf>-Fe<inf>3</inf>O<inf>4</inf><inf>[sbnd]</inf>Cu-H<inf>2</inf>O) under the influence of a magnetic field within an octagonal enclosure containing a circular obstacle. This work investigates HT features of a buoyancy-driven NC flow that is laminar, steady and incompressible. The study also takes into account the entropy generation (E<inf>gen</inf>) and the Bejan number (Be) in an octagonal enclosure with an inner circular obstacle for varying boundary conditions. The finite element method is used to numerically solve the governing equations and the associated boundary conditions. A variety of parameter values are employed in this study such as 0 % ≤ nanoparticles volume fraction (φ) ≤ 5 %, 10<sup>3</sup> ≤ Rayleigh number (Ra) ≤ 10<sup>6</sup>, 0 ≤ Hartmann number (Ha) ≤ 60. The present analysis highlights that the rate of HT and E<inf>gen</inf> can be improved by adding ternary hybrid nanoparticles within the cavity by 42.9 % and 14.89 % respectively. However, the average E<inf>gen</inf> becomes higher for increasing Ra and decreasing Ha at φ<inf>a</inf> = φ<inf>b</inf> = φ<inf>c</inf> = 5 %. Moreover, larger nanoparticle volumes result in improved thermal performance, especially when Ra is higher. The ternary hybrid nanofluids for this architecture has the potential to improve thermal management systems by efficiently reducing external heat loss.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	International Journal of Thermofluids
dc.relation.isbasedon	10.1016/j.ijft.2025.101480
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Ternary hybrid-nanofluid magneto-convective flow inside the octagonal enclosure with an inner circular obstacle contribution to entropy generation
dc.type	Journal Article
utslib.citation.volume	30
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/
dc.date.updated	2025-12-19T04:32:36Z
pubs.publication-status	Published
pubs.volume	30

Abstract:

Natural convection (NC) plays a pivotal role in convective heat transfer (HT) and has been extensively studied. This research focuses on examining the impact of different parameters on HT and fluid flow behavior of a ternary hybrid nanofluid (Al2O3-Fe3O4[sbnd]Cu-H2O) under the influence of a magnetic field within an octagonal enclosure containing a circular obstacle. This work investigates HT features of a buoyancy-driven NC flow that is laminar, steady and incompressible. The study also takes into account the entropy generation (Egen) and the Bejan number (Be) in an octagonal enclosure with an inner circular obstacle for varying boundary conditions. The finite element method is used to numerically solve the governing equations and the associated boundary conditions. A variety of parameter values are employed in this study such as 0 % ≤ nanoparticles volume fraction (φ) ≤ 5 %, 10³ ≤ Rayleigh number (Ra) ≤ 10⁶, 0 ≤ Hartmann number (Ha) ≤ 60. The present analysis highlights that the rate of HT and Egen can be improved by adding ternary hybrid nanoparticles within the cavity by 42.9 % and 14.89 % respectively. However, the average Egen becomes higher for increasing Ra and decreasing Ha at φa = φb = φc = 5 %. Moreover, larger nanoparticle volumes result in improved thermal performance, especially when Ra is higher. The ternary hybrid nanofluids for this architecture has the potential to improve thermal management systems by efficiently reducing external heat loss.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/191028