On the thermal performance of an internally finned three-dimensional cubic enclosure in natural convection

Silva, A.K. da; Gosselin, Louis

doi:10.1016/j.ijthermalsci.2004.11.011

Cited by 42 publications

(19 citation statements)

References 12 publications

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“…Inserting a flow obstacle to alter the convection currents in the cavities was proposed as a means to change the rate of heat transfer across enclosures (Mezrhab et al 2006;Bilgen 2005;da Silva and Gosselin 2005;Lauriat and Desrayaud 2006;Aviram et al 2001;Gebhart et al 1988;Nansteel and Greif 1981;Nansteel and Greif 1984;Olson et al 1990;Chen et al 1990;Warrington and Ameel 1995;Vasic et al 1991;Williams and Baker 1994;Hanjalic et al 1996;Bajorek and Lloyd 1982). Mezrhab et al (2006) studied the natural convection and radiation heat transfer in a cavity having a square body at its center.…”

Section: List Of Symbolsmentioning

confidence: 99%

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Internal baffles to reduce the natural convection in the voids of hollow blocks

Alhazmy

2010

Build. Simul.

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Hollow bricks are widely used to build facades of light weight and high thermal resistance. The air filled voids within the brick configuration elevates the block's thermal resistance. Disturbing the natural flow patterns developed inside the voids affects the blocks overall thermal resistance. This paper presents a numerical study for a section of a masonry brick represented by a baffled squared cavity surrounded by a conductive wall of finite thickness. The baffles are attached to the top and bottom sides dividing the void into three regions. The thermal resistance of the partitioned voids depends on baffles length and location. Short baffle develops a stratified region in the central gap and generates two circulation zones near the upper left and lower right corners. Long baffles, on the other hand, splits the flow into three different convection circulation cells, a cell near each side of the cavity and a third in the central gap. Increasing the baffle height increases the thermal resistance of the partitioned cavity for all gap widths. The highest increase in thermal resistance is 53% over the non baffled voids and is achieved with long baffles when located to divide the cavity into three regions of equal widths.

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Section: List Of Symbolsmentioning

confidence: 99%

“…Mezrhab et al (2006) studied the natural convection and radiation heat transfer in a cavity having a square body at its center. The effect of attaching fins to the hot wall was studied for a two-and three-dimensional cubic enclosure by Bilgen (2005) and da Silva and Gosselin (2005), respectively.…”

Section: List Of Symbolsmentioning

confidence: 99%

Internal baffles to reduce the natural convection in the voids of hollow blocks

Alhazmy

2010

Build. Simul.

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“…They scrutinized the effects of the partition geometry on the three dimensional flow properties. Silva and Gosselin [25] evaluated the effect of the aspect ratio and horizontal length of a high conductivity rectangular fin attached to the hot wall of a three dimensional differentially heated cubic enclosure in laminar natural convection, a scale analysis was used to predict the domain in which the fin geometry played a significant role. Frederick [26] made a numerical study of natural convection of air in a differentially heated cubical enclosure with a thick fin placed vertically in the middle of the hot wall; he investigated the variation of overall Nusselt number with Rayleigh number and thermal conductivity ratio.…”

Section: Journal Of Chemical Engineering and Process Technologymentioning

confidence: 99%

Effect of Partial Partitions on Natural Convection in Air Filled Cubical Enclosure with Hot Wavy Surface

SabeurBendehina¹

2014

J Chem Eng Process Technol

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Natural convection in cubical enclosure with hot surface geometry and partial partitions has been analyzed. The geometry is a cube with wavy hot surface (three undulations) and three partitions. The investigation has been performed for different partitions lengths and Rayleigh number while the Prandtl number kept constant. This problem is solved by using the partial differential equations which are the equation of mass, momentum, and energy. The results obtained show that the hot wall geometry with partitions affects the flow and the heat transfer rate in the cavity. It has been found also that the mean Nusselt number decreases compared with the heat transfer in the undulated cubical cavity without partitions.

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“…They found that the increase of fin height enhances the heat transfer. Da Silva and Gosselin [14] studied the 3D natural convection in cubic cavity equipped by a conductive fin. They showed that the geometrical parameters have an important effect on heat transfer and flow structure.…”

Section: Introductionmentioning

confidence: 99%

Natural convection and entropy production in a cubic cavity heated via pin-fins heat sinks

Al‐Rashed¹,

Kolsi²,

Öztop³

et al. 2017

IJHT

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In this study, heat transfer, flow structure and produced entropy due to natural convection in a threedimensional cavity heated via heat sinks are investigated numerically. One wall of the cavity is heated via pinfins and opposite wall is maintend at lower temperature. Remaining bouandaries are considered as adiabatic. Finite volume method is used to solve governing equations. Three geometrical cases are tested according to number and location of the fins. Other governing parameters are Rayleigh number and fin length. Number and length of the fins were found to be the most effective parameters on both heat transfer and entropy generation.

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On the thermal performance of an internally finned three-dimensional cubic enclosure in natural convection

Cited by 42 publications

References 12 publications

Internal baffles to reduce the natural convection in the voids of hollow blocks

Internal baffles to reduce the natural convection in the voids of hollow blocks

Effect of Partial Partitions on Natural Convection in Air Filled Cubical Enclosure with Hot Wavy Surface

Natural convection and entropy production in a cubic cavity heated via pin-fins heat sinks

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