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Transient Free Convection and Heat Transfer in a Partitioned attic-Shaped space under Diurnal Thermal Forcing

Energy Engineering 2021年第3期118卷 487-506页

作者： Suvash C.Saha Ali M.Sefidan Atta Sojoudi Mohammad M.Molla School of Mechanical and Mechatronic Engineering Faculty of Engineering and Information TechnologyUniversity of Technology SydneyUltimoNSW 2007Australia Mechanical Engineering Department University of CanterburyChristchurch8041New Zealand Mechanical Engineering Department University of TehranTehranIran Department of Mathematics and Physics North South UniversityDhaka1229Bangladesh

One primordial consideration in residential ventilation standards is the comfort of provided to people living in those *** is highly dependent on the thermal and fluid flow conditions,the space geometry and so *** designs may reduce the energy usage,making the buildings more sustainable over a longer period of *** 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 *** Finite Volume Method is applied to solve the governing *** 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 *** that through the partition,only heat could freely transfer between two fluid *** 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 *** results are particularly important for understanding the fluid dynamics inside the attic shaped building and also designing new residential building.

关键词： Free convection attic space partitioned diurnal thermal forcing computational fluid dynamics

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