Fluid flow and heat transfer of natural convection around heated V-shaped cavity

Natural convective flows around V-shaped cavities are encountered in some engineering applications such as over the heat-transfer plates or roofs having triangular-shaped grooves. In order to assess the heat transfer performance of these plates or roofs, detailed information on their flow and heat t...

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Autores principales:	Fumiyoshi KIMURA, Tatsuo NOGUCHI, Kenzo KITAMURA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	natural convection heat transfer flow and temperature visualization v-shaped cavity interaction Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/d06097d3e97f41af80b9fd9c8d4c1f7f
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spelling	oai:doaj.org-article:d06097d3e97f41af80b9fd9c8d4c1f7f2021-11-26T06:55:30ZFluid flow and heat transfer of natural convection around heated V-shaped cavity2187-974510.1299/mej.16-00330https://doaj.org/article/d06097d3e97f41af80b9fd9c8d4c1f7f2016-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/5/3_16-00330/_pdf/-char/enhttps://doaj.org/toc/2187-9745Natural convective flows around V-shaped cavities are encountered in some engineering applications such as over the heat-transfer plates or roofs having triangular-shaped grooves. In order to assess the heat transfer performance of these plates or roofs, detailed information on their flow and heat transfer will be needed. Thus, the experimental investigations have been carried out on natural convection of water induced around a heated, V-shaped open cavity. The open angles, θ, and the side lengths, W / 2, were varied systematically as θ = 90-180° and W / 2 = 25, 50, 100 mm. The flows in the cavity and the surface temperatures were visualized with fine nylon particles and a thermo-chromic liquid crystal sheet, respectively. The results showed that the ambient fluid first descends to the bottom edge of the cavity, and, then, directs to the upper edge of cavity when θ<135°. The local heat transfer coefficients were also measured. The results showed that the heat transfer is enhanced markedly when θ =120°. It is also found that the overall heat transfer coefficients from the cavity θ = 120° and W / 2 = 25 mm became 17% higher than that from the horizontal plate.Fumiyoshi KIMURATatsuo NOGUCHIKenzo KITAMURAThe Japan Society of Mechanical Engineersarticlenatural convectionheat transferflow and temperature visualizationv-shaped cavityinteractionMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 5, Pp 16-00330-16-00330 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	natural convection heat transfer flow and temperature visualization v-shaped cavity interaction Mechanical engineering and machinery TJ1-1570
spellingShingle	natural convection heat transfer flow and temperature visualization v-shaped cavity interaction Mechanical engineering and machinery TJ1-1570 Fumiyoshi KIMURA Tatsuo NOGUCHI Kenzo KITAMURA Fluid flow and heat transfer of natural convection around heated V-shaped cavity
description	Natural convective flows around V-shaped cavities are encountered in some engineering applications such as over the heat-transfer plates or roofs having triangular-shaped grooves. In order to assess the heat transfer performance of these plates or roofs, detailed information on their flow and heat transfer will be needed. Thus, the experimental investigations have been carried out on natural convection of water induced around a heated, V-shaped open cavity. The open angles, θ, and the side lengths, W / 2, were varied systematically as θ = 90-180° and W / 2 = 25, 50, 100 mm. The flows in the cavity and the surface temperatures were visualized with fine nylon particles and a thermo-chromic liquid crystal sheet, respectively. The results showed that the ambient fluid first descends to the bottom edge of the cavity, and, then, directs to the upper edge of cavity when θ<135°. The local heat transfer coefficients were also measured. The results showed that the heat transfer is enhanced markedly when θ =120°. It is also found that the overall heat transfer coefficients from the cavity θ = 120° and W / 2 = 25 mm became 17% higher than that from the horizontal plate.
format	article
author	Fumiyoshi KIMURA Tatsuo NOGUCHI Kenzo KITAMURA
author_facet	Fumiyoshi KIMURA Tatsuo NOGUCHI Kenzo KITAMURA
author_sort	Fumiyoshi KIMURA
title	Fluid flow and heat transfer of natural convection around heated V-shaped cavity
title_short	Fluid flow and heat transfer of natural convection around heated V-shaped cavity
title_full	Fluid flow and heat transfer of natural convection around heated V-shaped cavity
title_fullStr	Fluid flow and heat transfer of natural convection around heated V-shaped cavity
title_full_unstemmed	Fluid flow and heat transfer of natural convection around heated V-shaped cavity
title_sort	fluid flow and heat transfer of natural convection around heated v-shaped cavity
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/d06097d3e97f41af80b9fd9c8d4c1f7f
work_keys_str_mv	AT fumiyoshikimura fluidflowandheattransferofnaturalconvectionaroundheatedvshapedcavity AT tatsuonoguchi fluidflowandheattransferofnaturalconvectionaroundheatedvshapedcavity AT kenzokitamura fluidflowandheattransferofnaturalconvectionaroundheatedvshapedcavity
_version_	1718409745869570048

Fluid flow and heat transfer of natural convection around heated V-shaped cavity

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