Transient free convection and heat transfer in a partitioned attic-shaped space under diurnal thermal forcing

Saha, SC; Sefidan, AM; Sojoudi, A; Molla, MM

Transient free convection and heat transfer in a partitioned attic-shaped space under diurnal thermal forcing

Saha, SC Sefidan, AM Sojoudi, A Molla, MM

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Publisher:: Tech Science Press
Publication Type:: Journal Article
Citation:: Energy Engineering, 2021, 118, (3), pp. 487-506
Issue Date:: 2021-01-01

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Field	Value	Language
dc.contributor.author	Saha, SC
dc.contributor.author	Sefidan, AM
dc.contributor.author	Sojoudi, A
dc.contributor.author	Molla, MM
dc.date.accessioned	2022-03-02T03:05:07Z
dc.date.available	2022-03-02T03:05:07Z
dc.date.issued	2021-01-01
dc.identifier.citation	Energy Engineering, 2021, 118, (3), pp. 487-506
dc.identifier.issn	0199-8595
dc.identifier.issn	1546-0118
dc.identifier.uri	http://hdl.handle.net/10453/154957
dc.description.abstract	One primordial consideration in residential ventilation standards is the comfort of provided to people living in those habitations. This is highly dependent on the thermal and fluid flow conditions, the space geometry and so on. Efficient designs may reduce the energy usage, making the buildings more sustainable over a longer period of time. This study aims to investigate the impact of whole day thermal conditions on the fluid flow structure and heat transfer phenomena, mainly natural convection, inside a partitioned attic-shaped configuration. The Finite Volume Method is applied to solve the governing equations. Sinusoidal thermal boundary condition is applied on the sloping walls to illustrate the characteristics of primary flow through daily cycles. A highly thermal conductive partition was placed vertically at the middle of the cavity. Note that through the partition, only heat could freely transfer between two fluid zones. Results show that, during day time, a stratified fluid flow structure is obtained, which originates from the prevailing conduction heat transfer mechanism, while, for the night-time it changed into a strong convection mechanism which significantly affects the flow structure. These results are particularly important for understanding the fluid dynamics inside the attic shaped building and also designing new residential building.
dc.language	en
dc.publisher	Tech Science Press
dc.relation.ispartof	Energy Engineering
dc.relation.isbasedon	10.32604/EE.2021.014088
dc.rights	This work is licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	Energy
dc.title	Transient free convection and heat transfer in a partitioned attic-shaped space under diurnal thermal forcing
dc.type	Journal Article
utslib.citation.volume	118
utslib.for	0914 Resources Engineering and Extractive Metallurgy
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	recently_added	*
pubs.consider-herdc	false
dc.date.updated	2022-03-02T03:05:04Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	118
utslib.citation.issue	3

Abstract:

One primordial consideration in residential ventilation standards is the comfort of provided to people living in those habitations. This is highly dependent on the thermal and fluid flow conditions, the space geometry and so on. Efficient designs may reduce the energy usage, making the buildings more sustainable over a longer period of time. This study aims to investigate the impact of whole day thermal conditions on the fluid flow structure and heat transfer phenomena, mainly natural convection, inside a partitioned attic-shaped configuration. The Finite Volume Method is applied to solve the governing equations. Sinusoidal thermal boundary condition is applied on the sloping walls to illustrate the characteristics of primary flow through daily cycles. A highly thermal conductive partition was placed vertically at the middle of the cavity. Note that through the partition, only heat could freely transfer between two fluid zones. Results show that, during day time, a stratified fluid flow structure is obtained, which originates from the prevailing conduction heat transfer mechanism, while, for the night-time it changed into a strong convection mechanism which significantly affects the flow structure. These results are particularly important for understanding the fluid dynamics inside the attic shaped building and also designing new residential building.

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http://hdl.handle.net/10453/154957