Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter

Detalhes bibliográficos
Autor(a) principal: Vaz M.*
Data de Publicação: 2016
Outros Autores: Gargioni G.T.*, Zdanski, Paulo Sergio Berving
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da Udesc
dARK ID: ark:/33523/001300000k382
Texto Completo: https://repositorio.udesc.br/handle/UDESC/7851
Resumo: Copyright © 2016 Taylor & Francis Group, LLC.This work addresses the numerical simulation of incompressible turbulent recirculating channel flows in a backward-facing step. The effects of a small square turbulence promoter on convection heat transfer are evaluated through a parametric study. The governing equations comprise the time-averaged mass, linear momentum, and energy conservation principles in conjunction with the two-equation k-epsilon turbulence model. The study is focused on the assessment of the local and global Nusselt numbers at the channel stepped wall. The main results indicate that a maximum increment around 15% on the average Nusselt number can be achieved by using a small turbulence promoter to disturb the flow. Furthermore, it was found that the peak of the local Nusselt number on the stepped wall is located in the region where the turbulent diffusion is maximum in the near wall region.
id UDESC-2_6a0558da8712c26792b378b54af746f7
oai_identifier_str oai:repositorio.udesc.br:UDESC/7851
network_acronym_str UDESC-2
network_name_str Repositório Institucional da Udesc
repository_id_str 6391
spelling Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence PromoterCopyright © 2016 Taylor & Francis Group, LLC.This work addresses the numerical simulation of incompressible turbulent recirculating channel flows in a backward-facing step. The effects of a small square turbulence promoter on convection heat transfer are evaluated through a parametric study. The governing equations comprise the time-averaged mass, linear momentum, and energy conservation principles in conjunction with the two-equation k-epsilon turbulence model. The study is focused on the assessment of the local and global Nusselt numbers at the channel stepped wall. The main results indicate that a maximum increment around 15% on the average Nusselt number can be achieved by using a small turbulence promoter to disturb the flow. Furthermore, it was found that the peak of the local Nusselt number on the stepped wall is located in the region where the turbulent diffusion is maximum in the near wall region.2024-12-06T13:52:34Z2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlep. 162 - 1711521-053710.1080/01457632.2015.1044396https://repositorio.udesc.br/handle/UDESC/7851ark:/33523/001300000k382Heat Transfer Engineering372Vaz M.*Gargioni G.T.*Zdanski, Paulo Sergio Bervingengreponame:Repositório Institucional da Udescinstname:Universidade do Estado de Santa Catarina (UDESC)instacron:UDESCinfo:eu-repo/semantics/openAccess2024-12-07T20:55:35Zoai:repositorio.udesc.br:UDESC/7851Biblioteca Digital de Teses e Dissertaçõeshttps://pergamumweb.udesc.br/biblioteca/index.phpPRIhttps://repositorio-api.udesc.br/server/oai/requestri@udesc.bropendoar:63912024-12-07T20:55:35Repositório Institucional da Udesc - Universidade do Estado de Santa Catarina (UDESC)false
dc.title.none.fl_str_mv Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter
title Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter
spellingShingle Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter
Vaz M.*
title_short Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter
title_full Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter
title_fullStr Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter
title_full_unstemmed Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter
title_sort Convection Heat Transfer Enhancement on Recirculating Flows in a Backward Facing Step: The Effects of a Small Square Turbulence Promoter
author Vaz M.*
author_facet Vaz M.*
Gargioni G.T.*
Zdanski, Paulo Sergio Berving
author_role author
author2 Gargioni G.T.*
Zdanski, Paulo Sergio Berving
author2_role author
author
dc.contributor.author.fl_str_mv Vaz M.*
Gargioni G.T.*
Zdanski, Paulo Sergio Berving
description Copyright © 2016 Taylor & Francis Group, LLC.This work addresses the numerical simulation of incompressible turbulent recirculating channel flows in a backward-facing step. The effects of a small square turbulence promoter on convection heat transfer are evaluated through a parametric study. The governing equations comprise the time-averaged mass, linear momentum, and energy conservation principles in conjunction with the two-equation k-epsilon turbulence model. The study is focused on the assessment of the local and global Nusselt numbers at the channel stepped wall. The main results indicate that a maximum increment around 15% on the average Nusselt number can be achieved by using a small turbulence promoter to disturb the flow. Furthermore, it was found that the peak of the local Nusselt number on the stepped wall is located in the region where the turbulent diffusion is maximum in the near wall region.
publishDate 2016
dc.date.none.fl_str_mv 2016
2024-12-06T13:52:34Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv 1521-0537
10.1080/01457632.2015.1044396
https://repositorio.udesc.br/handle/UDESC/7851
dc.identifier.dark.fl_str_mv ark:/33523/001300000k382
identifier_str_mv 1521-0537
10.1080/01457632.2015.1044396
ark:/33523/001300000k382
url https://repositorio.udesc.br/handle/UDESC/7851
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Heat Transfer Engineering
37
2
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv p. 162 - 171
dc.source.none.fl_str_mv reponame:Repositório Institucional da Udesc
instname:Universidade do Estado de Santa Catarina (UDESC)
instacron:UDESC
instname_str Universidade do Estado de Santa Catarina (UDESC)
instacron_str UDESC
institution UDESC
reponame_str Repositório Institucional da Udesc
collection Repositório Institucional da Udesc
repository.name.fl_str_mv Repositório Institucional da Udesc - Universidade do Estado de Santa Catarina (UDESC)
repository.mail.fl_str_mv ri@udesc.br
_version_ 1842258140258631680

Registros relacionados