Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Revista Interdisciplinar de Pesquisa em Engenharia |
Texto Completo: | https://periodicos.unb.br/index.php/ripe/article/view/45115 |
Resumo: | An Immersed Boundary Method (IBM) is development for the fluid-body interaction, being consider, in this work, the heat-transfer by forced convection and the onset turbulence in two-dimensional (2D) thermofluidodynamics around isothermal cylinders in tandem, immersed in incompressible Newtonian fluid. The fluid motion and temperature are defined on a Lagragian mesh. A Virtual Physical Model (VPM) is used for the diffusion of interfacial forces within the flow, guarantees the imposition of the no-slip boundary condition. This model dynamically evaluates, not only the forces that the fluid exerts on the solid surface, but the heat exchange between them. Therefore, this work presents the Navier-Stokes equations together with Energy equation, under physically appropriate boundary conditions. To calculate the onset turbulence viscosity was used the Smagorinsky Model (SM), implemented in the context of the Large Eddy Simulation Model (LESM). This work confirms that, downstream of the immersed bluff body, the recirculation: i) increases with the increase in the Reynolds numbers, keeping the Richardson numbers constant, and ii) decrease with the increase in the Richardson number, preserving the Reynolds number constant. It also confirms the generation of the thermal plumes moving upwards. The results are validated with previous numerical results, considering different Reynolds numbers. |
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Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method Simulação Numérica da Termofluidodinâmica entorno de cilindros isotérmicos em tandem usando o método de fronteira imersaForced convectionImmersed Boundary MethodSmagorinsky ModelConvecção ForçadaMétodo de Fronteira ImersaModelo de SmagorinskyAn Immersed Boundary Method (IBM) is development for the fluid-body interaction, being consider, in this work, the heat-transfer by forced convection and the onset turbulence in two-dimensional (2D) thermofluidodynamics around isothermal cylinders in tandem, immersed in incompressible Newtonian fluid. The fluid motion and temperature are defined on a Lagragian mesh. A Virtual Physical Model (VPM) is used for the diffusion of interfacial forces within the flow, guarantees the imposition of the no-slip boundary condition. This model dynamically evaluates, not only the forces that the fluid exerts on the solid surface, but the heat exchange between them. Therefore, this work presents the Navier-Stokes equations together with Energy equation, under physically appropriate boundary conditions. To calculate the onset turbulence viscosity was used the Smagorinsky Model (SM), implemented in the context of the Large Eddy Simulation Model (LESM). This work confirms that, downstream of the immersed bluff body, the recirculation: i) increases with the increase in the Reynolds numbers, keeping the Richardson numbers constant, and ii) decrease with the increase in the Richardson number, preserving the Reynolds number constant. It also confirms the generation of the thermal plumes moving upwards. The results are validated with previous numerical results, considering different Reynolds numbers.Um Método de Fronteira Imersa (IBM) está sendo desenvolvido para a interação fluido-corpo, considerando, neste trabalho, a transferência de calor por convecção forçada e o início da turbulência em termofluidodinâmica bidimensional (2D) em torno de cilindros isotérmicos em tandem, imersos em fluido newtoniano incompressível. O movimento e a temperatura do fluido são definidos em uma malha Lagragiana. Um Modelo Físico Virtual (VPM) é utilizado para a difusão de forças interfaciais dentro do escoamento, garantindo a imposição da condição de contorno de não deslizamento. Este modelo avalia dinamicamente, não apenas as forças que o fluido exerce sobre a superfície sólida, mas a troca de calor entre eles. Portanto, este trabalho apresenta as equações de Navier-Stokes juntamente com a equação de Energia, sob condições de contorno fisicamente apropriadas. Para calcular a viscosidade de início de turbulência foi utilizado o Modelo Smagorinsky (SM), implementado no contexto do Large Eddy Simulation Model (LESM). Este trabalho confirma que, a jusante do corpo do penhasco imerso, a recirculação: i) aumenta com o aumento do número de Reynolds, mantendo os números de Richardson constantes, e ii) diminui com o aumento do número de Richardson, preservando o número de Reynolds constante. Também confirma a geração das plumas térmicas se movendo para cima. Os resultados são validados com resultados numéricos anteriores, considerando diferentes números de Reynolds.Programa de Pós-Graduação em Integridade de Materiais da Engenharia2023-01-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.unb.br/index.php/ripe/article/view/45115Revista Interdisciplinar de Pesquisa em Engenharia; Vol. 8 No. 2 (2022): Revista Interdisciplinar de Pesquisa em Engenharia ; 93-10Revista Interdisciplinar de Pesquisa em Engenharia; v. 8 n. 2 (2022): Revista Interdisciplinar de Pesquisa em Engenharia ; 93-102447-6102reponame:Revista Interdisciplinar de Pesquisa em Engenhariainstname:Universidade de Brasília (UnB)instacron:UNBporhttps://periodicos.unb.br/index.php/ripe/article/view/45115/36276Copyright (c) 2023 Revista Interdisciplinar de Pesquisa em Engenhariahttps://creativecommons.org/licenses/by-nd/4.0info:eu-repo/semantics/openAccessChaves dos Santos, Rômulo Damasclin2023-01-31T20:59:38Zoai:ojs.pkp.sfu.ca:article/45115Revistahttps://periodicos.unb.br/index.php/ripePUBhttps://periodicos.unb.br/index.php/ripe/oaianflor@unb.br2447-61022447-6102opendoar:2023-01-31T20:59:38Revista Interdisciplinar de Pesquisa em Engenharia - Universidade de Brasília (UnB)false |
dc.title.none.fl_str_mv |
Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method Simulação Numérica da Termofluidodinâmica entorno de cilindros isotérmicos em tandem usando o método de fronteira imersa |
title |
Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method |
spellingShingle |
Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method Chaves dos Santos, Rômulo Damasclin Forced convection Immersed Boundary Method Smagorinsky Model Convecção Forçada Método de Fronteira Imersa Modelo de Smagorinsky |
title_short |
Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method |
title_full |
Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method |
title_fullStr |
Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method |
title_full_unstemmed |
Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method |
title_sort |
Um Numerical simulation of thermofluidodynamics over isothermal cylinders in tandem using the immersed boundary method |
author |
Chaves dos Santos, Rômulo Damasclin |
author_facet |
Chaves dos Santos, Rômulo Damasclin |
author_role |
author |
dc.contributor.author.fl_str_mv |
Chaves dos Santos, Rômulo Damasclin |
dc.subject.por.fl_str_mv |
Forced convection Immersed Boundary Method Smagorinsky Model Convecção Forçada Método de Fronteira Imersa Modelo de Smagorinsky |
topic |
Forced convection Immersed Boundary Method Smagorinsky Model Convecção Forçada Método de Fronteira Imersa Modelo de Smagorinsky |
description |
An Immersed Boundary Method (IBM) is development for the fluid-body interaction, being consider, in this work, the heat-transfer by forced convection and the onset turbulence in two-dimensional (2D) thermofluidodynamics around isothermal cylinders in tandem, immersed in incompressible Newtonian fluid. The fluid motion and temperature are defined on a Lagragian mesh. A Virtual Physical Model (VPM) is used for the diffusion of interfacial forces within the flow, guarantees the imposition of the no-slip boundary condition. This model dynamically evaluates, not only the forces that the fluid exerts on the solid surface, but the heat exchange between them. Therefore, this work presents the Navier-Stokes equations together with Energy equation, under physically appropriate boundary conditions. To calculate the onset turbulence viscosity was used the Smagorinsky Model (SM), implemented in the context of the Large Eddy Simulation Model (LESM). This work confirms that, downstream of the immersed bluff body, the recirculation: i) increases with the increase in the Reynolds numbers, keeping the Richardson numbers constant, and ii) decrease with the increase in the Richardson number, preserving the Reynolds number constant. It also confirms the generation of the thermal plumes moving upwards. The results are validated with previous numerical results, considering different Reynolds numbers. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-01-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.unb.br/index.php/ripe/article/view/45115 |
url |
https://periodicos.unb.br/index.php/ripe/article/view/45115 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.unb.br/index.php/ripe/article/view/45115/36276 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2023 Revista Interdisciplinar de Pesquisa em Engenharia https://creativecommons.org/licenses/by-nd/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2023 Revista Interdisciplinar de Pesquisa em Engenharia https://creativecommons.org/licenses/by-nd/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Programa de Pós-Graduação em Integridade de Materiais da Engenharia |
publisher.none.fl_str_mv |
Programa de Pós-Graduação em Integridade de Materiais da Engenharia |
dc.source.none.fl_str_mv |
Revista Interdisciplinar de Pesquisa em Engenharia; Vol. 8 No. 2 (2022): Revista Interdisciplinar de Pesquisa em Engenharia ; 93-10 Revista Interdisciplinar de Pesquisa em Engenharia; v. 8 n. 2 (2022): Revista Interdisciplinar de Pesquisa em Engenharia ; 93-10 2447-6102 reponame:Revista Interdisciplinar de Pesquisa em Engenharia instname:Universidade de Brasília (UnB) instacron:UNB |
instname_str |
Universidade de Brasília (UnB) |
instacron_str |
UNB |
institution |
UNB |
reponame_str |
Revista Interdisciplinar de Pesquisa em Engenharia |
collection |
Revista Interdisciplinar de Pesquisa em Engenharia |
repository.name.fl_str_mv |
Revista Interdisciplinar de Pesquisa em Engenharia - Universidade de Brasília (UnB) |
repository.mail.fl_str_mv |
anflor@unb.br |
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1798315224267227136 |