Single-point transition modeling using the laminar kinetic energy concept
Autor(a) principal: | |
---|---|
Data de Publicação: | 2014 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Biblioteca Digital de Teses e Dissertações do ITA |
Texto Completo: | http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=3041 |
Resumo: | This work investigates transition to turbulence using laminar kinetic energy modeling based in single-point RANS approach. The transport equations are discretized using the cell centered control-volume method and the system of algebraic equations is relaxed using SIMPLE algorithm. A modified version of the most known laminar kinetic energy model is proposed and compared with the original version and with an experimental correlation transition model. The numerical results show that the laminar kinetic energy approach has reasonable experimental correlation. The modified version presents improvements in prediction of skin friction coefficient in pressure gradients flows. Laminar kinetic energy model showed weakness when dealing with detached induced transition. Probably the cause of that is the lack of physical modeling of this phenomenon. Laminar kinetic energy modeling is in continuous evolution and is a good alternative to deal with engineering simulation that needs a good prediction of wall shear stress in transitional flows. |
id |
ITA_77f2e7b82f3bf6587f37a1bd8503da48 |
---|---|
oai_identifier_str |
oai:agregador.ibict.br.BDTD_ITA:oai:ita.br:3041 |
network_acronym_str |
ITA |
network_name_str |
Biblioteca Digital de Teses e Dissertações do ITA |
spelling |
Single-point transition modeling using the laminar kinetic energy conceptEstado de transiçãoEscoamento laminarEscoamento turbulentoSimulação computadorizadaDinâmica dos fluidos computacionalCoeficiente de atritoEnergia cinéticaFísicaThis work investigates transition to turbulence using laminar kinetic energy modeling based in single-point RANS approach. The transport equations are discretized using the cell centered control-volume method and the system of algebraic equations is relaxed using SIMPLE algorithm. A modified version of the most known laminar kinetic energy model is proposed and compared with the original version and with an experimental correlation transition model. The numerical results show that the laminar kinetic energy approach has reasonable experimental correlation. The modified version presents improvements in prediction of skin friction coefficient in pressure gradients flows. Laminar kinetic energy model showed weakness when dealing with detached induced transition. Probably the cause of that is the lack of physical modeling of this phenomenon. Laminar kinetic energy modeling is in continuous evolution and is a good alternative to deal with engineering simulation that needs a good prediction of wall shear stress in transitional flows.Instituto Tecnológico de AeronáuticaMarcelo José Santos de LemosIcaro Augusto Accordi2014-06-29info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=3041reponame:Biblioteca Digital de Teses e Dissertações do ITAinstname:Instituto Tecnológico de Aeronáuticainstacron:ITAenginfo:eu-repo/semantics/openAccessapplication/pdf2019-02-02T14:05:03Zoai:agregador.ibict.br.BDTD_ITA:oai:ita.br:3041http://oai.bdtd.ibict.br/requestopendoar:null2020-05-28 19:40:53.203Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáuticatrue |
dc.title.none.fl_str_mv |
Single-point transition modeling using the laminar kinetic energy concept |
title |
Single-point transition modeling using the laminar kinetic energy concept |
spellingShingle |
Single-point transition modeling using the laminar kinetic energy concept Icaro Augusto Accordi Estado de transição Escoamento laminar Escoamento turbulento Simulação computadorizada Dinâmica dos fluidos computacional Coeficiente de atrito Energia cinética Física |
title_short |
Single-point transition modeling using the laminar kinetic energy concept |
title_full |
Single-point transition modeling using the laminar kinetic energy concept |
title_fullStr |
Single-point transition modeling using the laminar kinetic energy concept |
title_full_unstemmed |
Single-point transition modeling using the laminar kinetic energy concept |
title_sort |
Single-point transition modeling using the laminar kinetic energy concept |
author |
Icaro Augusto Accordi |
author_facet |
Icaro Augusto Accordi |
author_role |
author |
dc.contributor.none.fl_str_mv |
Marcelo José Santos de Lemos |
dc.contributor.author.fl_str_mv |
Icaro Augusto Accordi |
dc.subject.por.fl_str_mv |
Estado de transição Escoamento laminar Escoamento turbulento Simulação computadorizada Dinâmica dos fluidos computacional Coeficiente de atrito Energia cinética Física |
topic |
Estado de transição Escoamento laminar Escoamento turbulento Simulação computadorizada Dinâmica dos fluidos computacional Coeficiente de atrito Energia cinética Física |
dc.description.none.fl_txt_mv |
This work investigates transition to turbulence using laminar kinetic energy modeling based in single-point RANS approach. The transport equations are discretized using the cell centered control-volume method and the system of algebraic equations is relaxed using SIMPLE algorithm. A modified version of the most known laminar kinetic energy model is proposed and compared with the original version and with an experimental correlation transition model. The numerical results show that the laminar kinetic energy approach has reasonable experimental correlation. The modified version presents improvements in prediction of skin friction coefficient in pressure gradients flows. Laminar kinetic energy model showed weakness when dealing with detached induced transition. Probably the cause of that is the lack of physical modeling of this phenomenon. Laminar kinetic energy modeling is in continuous evolution and is a good alternative to deal with engineering simulation that needs a good prediction of wall shear stress in transitional flows. |
description |
This work investigates transition to turbulence using laminar kinetic energy modeling based in single-point RANS approach. The transport equations are discretized using the cell centered control-volume method and the system of algebraic equations is relaxed using SIMPLE algorithm. A modified version of the most known laminar kinetic energy model is proposed and compared with the original version and with an experimental correlation transition model. The numerical results show that the laminar kinetic energy approach has reasonable experimental correlation. The modified version presents improvements in prediction of skin friction coefficient in pressure gradients flows. Laminar kinetic energy model showed weakness when dealing with detached induced transition. Probably the cause of that is the lack of physical modeling of this phenomenon. Laminar kinetic energy modeling is in continuous evolution and is a good alternative to deal with engineering simulation that needs a good prediction of wall shear stress in transitional flows. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-06-29 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/masterThesis |
status_str |
publishedVersion |
format |
masterThesis |
dc.identifier.uri.fl_str_mv |
http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=3041 |
url |
http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=3041 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Instituto Tecnológico de Aeronáutica |
publisher.none.fl_str_mv |
Instituto Tecnológico de Aeronáutica |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações do ITA instname:Instituto Tecnológico de Aeronáutica instacron:ITA |
reponame_str |
Biblioteca Digital de Teses e Dissertações do ITA |
collection |
Biblioteca Digital de Teses e Dissertações do ITA |
instname_str |
Instituto Tecnológico de Aeronáutica |
instacron_str |
ITA |
institution |
ITA |
repository.name.fl_str_mv |
Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáutica |
repository.mail.fl_str_mv |
|
subject_por_txtF_mv |
Estado de transição Escoamento laminar Escoamento turbulento Simulação computadorizada Dinâmica dos fluidos computacional Coeficiente de atrito Energia cinética Física |
_version_ |
1706809294541815808 |