Wall function treatment for bubbly boundary layers at low void fractions

Detalhes bibliográficos
Autor(a) principal: SOARES,DANIEL V.
Data de Publicação: 2018
Outros Autores: BITENCOURT,MARCELO C, LOUREIRO,JULIANA B.R., SILVA FREIRE,ATILA P.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Anais da Academia Brasileira de Ciências (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100573
Resumo: Abstract The present work investigates the role of different treatments of the lower boundary condition on the numerical prediction of bubbly flows. Two different wall function formulations are tested against experimental data obtained for bubbly boundary layers: (i) a new analytical solution derived through asymptotic techniques and (ii) the previous formulation of Troshko and Hassan (IJHMT, 44, 871-875, 2001a). A modified k-e model is used to close the averaged Navier-Stokes equations together with the hypothesis that turbulence can be modelled by a linear superposition of bubble and shear induced eddy viscosities. The work shows, in particular, how four corrections must the implemented in the standard single-phase k-e model to account for the effects of bubbles. The numerical implementation of the near wall functions is made through a finite elements code.
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spelling Wall function treatment for bubbly boundary layers at low void fractionsbubbly flowlaw of the wallk-epipe flowturbulenceAbstract The present work investigates the role of different treatments of the lower boundary condition on the numerical prediction of bubbly flows. Two different wall function formulations are tested against experimental data obtained for bubbly boundary layers: (i) a new analytical solution derived through asymptotic techniques and (ii) the previous formulation of Troshko and Hassan (IJHMT, 44, 871-875, 2001a). A modified k-e model is used to close the averaged Navier-Stokes equations together with the hypothesis that turbulence can be modelled by a linear superposition of bubble and shear induced eddy viscosities. The work shows, in particular, how four corrections must the implemented in the standard single-phase k-e model to account for the effects of bubbles. The numerical implementation of the near wall functions is made through a finite elements code.Academia Brasileira de Ciências2018-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100573Anais da Academia Brasileira de Ciências v.90 n.1 2018reponame:Anais da Academia Brasileira de Ciências (Online)instname:Academia Brasileira de Ciências (ABC)instacron:ABC10.1590/0001-3765201820170101info:eu-repo/semantics/openAccessSOARES,DANIEL V.BITENCOURT,MARCELO CLOUREIRO,JULIANA B.R.SILVA FREIRE,ATILA P.eng2018-04-25T00:00:00Zoai:scielo:S0001-37652018000100573Revistahttp://www.scielo.br/aabchttps://old.scielo.br/oai/scielo-oai.php||aabc@abc.org.br1678-26900001-3765opendoar:2018-04-25T00:00Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)false
dc.title.none.fl_str_mv Wall function treatment for bubbly boundary layers at low void fractions
title Wall function treatment for bubbly boundary layers at low void fractions
spellingShingle Wall function treatment for bubbly boundary layers at low void fractions
SOARES,DANIEL V.
bubbly flow
law of the wall
k-e
pipe flow
turbulence
title_short Wall function treatment for bubbly boundary layers at low void fractions
title_full Wall function treatment for bubbly boundary layers at low void fractions
title_fullStr Wall function treatment for bubbly boundary layers at low void fractions
title_full_unstemmed Wall function treatment for bubbly boundary layers at low void fractions
title_sort Wall function treatment for bubbly boundary layers at low void fractions
author SOARES,DANIEL V.
author_facet SOARES,DANIEL V.
BITENCOURT,MARCELO C
LOUREIRO,JULIANA B.R.
SILVA FREIRE,ATILA P.
author_role author
author2 BITENCOURT,MARCELO C
LOUREIRO,JULIANA B.R.
SILVA FREIRE,ATILA P.
author2_role author
author
author
dc.contributor.author.fl_str_mv SOARES,DANIEL V.
BITENCOURT,MARCELO C
LOUREIRO,JULIANA B.R.
SILVA FREIRE,ATILA P.
dc.subject.por.fl_str_mv bubbly flow
law of the wall
k-e
pipe flow
turbulence
topic bubbly flow
law of the wall
k-e
pipe flow
turbulence
description Abstract The present work investigates the role of different treatments of the lower boundary condition on the numerical prediction of bubbly flows. Two different wall function formulations are tested against experimental data obtained for bubbly boundary layers: (i) a new analytical solution derived through asymptotic techniques and (ii) the previous formulation of Troshko and Hassan (IJHMT, 44, 871-875, 2001a). A modified k-e model is used to close the averaged Navier-Stokes equations together with the hypothesis that turbulence can be modelled by a linear superposition of bubble and shear induced eddy viscosities. The work shows, in particular, how four corrections must the implemented in the standard single-phase k-e model to account for the effects of bubbles. The numerical implementation of the near wall functions is made through a finite elements code.
publishDate 2018
dc.date.none.fl_str_mv 2018-03-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100573
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100573
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0001-3765201820170101
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Academia Brasileira de Ciências
publisher.none.fl_str_mv Academia Brasileira de Ciências
dc.source.none.fl_str_mv Anais da Academia Brasileira de Ciências v.90 n.1 2018
reponame:Anais da Academia Brasileira de Ciências (Online)
instname:Academia Brasileira de Ciências (ABC)
instacron:ABC
instname_str Academia Brasileira de Ciências (ABC)
instacron_str ABC
institution ABC
reponame_str Anais da Academia Brasileira de Ciências (Online)
collection Anais da Academia Brasileira de Ciências (Online)
repository.name.fl_str_mv Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)
repository.mail.fl_str_mv ||aabc@abc.org.br
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