Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models

Autores
Coussirat, Miguel; Moll, Flavio
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión aceptada
Descripción
Cavitating flow is a complex phenomenon related with turbulent and multiphase flows with mass transfer between the liquid and gaseous phases. This flow is affected by several factors as surrounding pressure, the local state of the turbulence, the non-condensable dissolved gases concentration and others effects. To study this kind of flow, several numerical models have been developed and they are now available in commercial and in-house software. A numerical model for cavitating flows involves a multiphase model, including both mass transfer and turbulence submodels. Inside of a commercial or an in-house numerical code there are several options and possible combinations of these submodels. A selection of the more suitable combination from this broad offer is a difficult task, involving then a subsequent careful calibration of the models selected, due to the fact that the default values for the calibration parameters that have these submodels, are related to simple flow conditions, i.e., simple geometries and flows without any detachment. Under cavitation conditions, these conditions are not the common situation. This work deals with the enhancement of some previous results obtained that allow to say that it is possible to capture several cavitating flows characteristics, improving a ‘standard’ numerical (i.e., without any calibration) simulation by means of a detailed tuning of the production/dissipation coefficients present in the equations of the Eddy Viscosity Models for turbulence, and other parameters related to the two-phase state of the flow. The numerical results obtained were compared against experimental data for pressure, velocity and the structure of the two-phase cavity. It is demonstrated that a careful calibration of both the turbulence and the cavitation submodels used is of paramount importance, because there is a very close relation between the turbulence state of the flow and the cavitation inception/developing conditions. A suitable calibration work allows also diminish the mesh size, saving a lot of computational resources or the use of more sophisticated strategies for turbulence simulations (e.g., Large Eddy Simulations). Those are very expensive in terms of the necessary computational resources required. A more general conclusions than obtained in previous works are presented, because results for other different nozzles configurations were obtained.
Fil: Universidad Tecnológica Nacional. Facultad Regional Mendoza, Argentina
Peer Reviewed
Fuente
Mecánica Computacional (35), 819-841. (2017)
Materia
Cavitating flow, Turbulence, Orifices, Nozzle-injectors, Validation/calibration tasks.
Nivel de accesibilidad
acceso abierto
Condiciones de uso
2024-03-11T15:52:46Z
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/9683
Acceder
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network_acronym_str RIAUTN
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network_name_str Repositorio Institucional Abierto (UTN)
spelling Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation modelsCoussirat, MiguelMoll, FlavioCavitating flow, Turbulence, Orifices, Nozzle-injectors, Validation/calibration tasks.Cavitating flow is a complex phenomenon related with turbulent and multiphase flows with mass transfer between the liquid and gaseous phases. This flow is affected by several factors as surrounding pressure, the local state of the turbulence, the non-condensable dissolved gases concentration and others effects. To study this kind of flow, several numerical models have been developed and they are now available in commercial and in-house software. A numerical model for cavitating flows involves a multiphase model, including both mass transfer and turbulence submodels. Inside of a commercial or an in-house numerical code there are several options and possible combinations of these submodels. A selection of the more suitable combination from this broad offer is a difficult task, involving then a subsequent careful calibration of the models selected, due to the fact that the default values for the calibration parameters that have these submodels, are related to simple flow conditions, i.e., simple geometries and flows without any detachment. Under cavitation conditions, these conditions are not the common situation. This work deals with the enhancement of some previous results obtained that allow to say that it is possible to capture several cavitating flows characteristics, improving a ‘standard’ numerical (i.e., without any calibration) simulation by means of a detailed tuning of the production/dissipation coefficients present in the equations of the Eddy Viscosity Models for turbulence, and other parameters related to the two-phase state of the flow. The numerical results obtained were compared against experimental data for pressure, velocity and the structure of the two-phase cavity. It is demonstrated that a careful calibration of both the turbulence and the cavitation submodels used is of paramount importance, because there is a very close relation between the turbulence state of the flow and the cavitation inception/developing conditions. A suitable calibration work allows also diminish the mesh size, saving a lot of computational resources or the use of more sophisticated strategies for turbulence simulations (e.g., Large Eddy Simulations). Those are very expensive in terms of the necessary computational resources required. A more general conclusions than obtained in previous works are presented, because results for other different nozzles configurations were obtained.Fil: Universidad Tecnológica Nacional. Facultad Regional Mendoza, ArgentinaPeer Reviewed2024-03-11T15:52:46Z2024-03-11T15:52:46Z2017-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articulopdfapplication/octet-streamMecánica Computacional Vol XXXVhttp://hdl.handle.net/20.500.12272/9683*Mecánica Computacional (35), 819-841. (2017)reponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacionalenginfo:eu-repo/semantics/openAccess2024-03-11T15:52:46Zhttp://creativecommons.org/publicdomain/zero/1.0/CC0 1.0 UniversalUniversidad Tecnológica Nacional. Facultad Regional MendozaAtribución2026-09-24T12:48:23Zoai:ria.utn.edu.ar:20.500.12272/9683instacron:UTNInstitucionalhttp://ria.utn.edu.ar/Universidad públicaNo correspondehttp://ria.utn.edu.ar/oaigestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:a2026-09-24 12:48:24.073Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models
title Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models
spellingShingle Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models
Coussirat, Miguel
Cavitating flow, Turbulence, Orifices, Nozzle-injectors, Validation/calibration tasks.
title_short Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models
title_full Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models
title_fullStr Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models
title_full_unstemmed Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models
title_sort Reproduction of the cavitating flows patterns in several nozzles geometries by using calibrated turbulence and cavitation models
dc.creator.none.fl_str_mv Coussirat, Miguel
Moll, Flavio
author Coussirat, Miguel
author_facet Coussirat, Miguel
Moll, Flavio
author_role author
author2 Moll, Flavio
author2_role author
dc.subject.none.fl_str_mv Cavitating flow, Turbulence, Orifices, Nozzle-injectors, Validation/calibration tasks.
topic Cavitating flow, Turbulence, Orifices, Nozzle-injectors, Validation/calibration tasks.
dc.description.none.fl_txt_mv Cavitating flow is a complex phenomenon related with turbulent and multiphase flows with mass transfer between the liquid and gaseous phases. This flow is affected by several factors as surrounding pressure, the local state of the turbulence, the non-condensable dissolved gases concentration and others effects. To study this kind of flow, several numerical models have been developed and they are now available in commercial and in-house software. A numerical model for cavitating flows involves a multiphase model, including both mass transfer and turbulence submodels. Inside of a commercial or an in-house numerical code there are several options and possible combinations of these submodels. A selection of the more suitable combination from this broad offer is a difficult task, involving then a subsequent careful calibration of the models selected, due to the fact that the default values for the calibration parameters that have these submodels, are related to simple flow conditions, i.e., simple geometries and flows without any detachment. Under cavitation conditions, these conditions are not the common situation. This work deals with the enhancement of some previous results obtained that allow to say that it is possible to capture several cavitating flows characteristics, improving a ‘standard’ numerical (i.e., without any calibration) simulation by means of a detailed tuning of the production/dissipation coefficients present in the equations of the Eddy Viscosity Models for turbulence, and other parameters related to the two-phase state of the flow. The numerical results obtained were compared against experimental data for pressure, velocity and the structure of the two-phase cavity. It is demonstrated that a careful calibration of both the turbulence and the cavitation submodels used is of paramount importance, because there is a very close relation between the turbulence state of the flow and the cavitation inception/developing conditions. A suitable calibration work allows also diminish the mesh size, saving a lot of computational resources or the use of more sophisticated strategies for turbulence simulations (e.g., Large Eddy Simulations). Those are very expensive in terms of the necessary computational resources required. A more general conclusions than obtained in previous works are presented, because results for other different nozzles configurations were obtained.
Fil: Universidad Tecnológica Nacional. Facultad Regional Mendoza, Argentina
Peer Reviewed
description Cavitating flow is a complex phenomenon related with turbulent and multiphase flows with mass transfer between the liquid and gaseous phases. This flow is affected by several factors as surrounding pressure, the local state of the turbulence, the non-condensable dissolved gases concentration and others effects. To study this kind of flow, several numerical models have been developed and they are now available in commercial and in-house software. A numerical model for cavitating flows involves a multiphase model, including both mass transfer and turbulence submodels. Inside of a commercial or an in-house numerical code there are several options and possible combinations of these submodels. A selection of the more suitable combination from this broad offer is a difficult task, involving then a subsequent careful calibration of the models selected, due to the fact that the default values for the calibration parameters that have these submodels, are related to simple flow conditions, i.e., simple geometries and flows without any detachment. Under cavitation conditions, these conditions are not the common situation. This work deals with the enhancement of some previous results obtained that allow to say that it is possible to capture several cavitating flows characteristics, improving a ‘standard’ numerical (i.e., without any calibration) simulation by means of a detailed tuning of the production/dissipation coefficients present in the equations of the Eddy Viscosity Models for turbulence, and other parameters related to the two-phase state of the flow. The numerical results obtained were compared against experimental data for pressure, velocity and the structure of the two-phase cavity. It is demonstrated that a careful calibration of both the turbulence and the cavitation submodels used is of paramount importance, because there is a very close relation between the turbulence state of the flow and the cavitation inception/developing conditions. A suitable calibration work allows also diminish the mesh size, saving a lot of computational resources or the use of more sophisticated strategies for turbulence simulations (e.g., Large Eddy Simulations). Those are very expensive in terms of the necessary computational resources required. A more general conclusions than obtained in previous works are presented, because results for other different nozzles configurations were obtained.
publishDate 2017
dc.date.none.fl_str_mv 2017-11-01
2024-03-11T15:52:46Z
2024-03-11T15:52:46Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv Mecánica Computacional Vol XXXV
http://hdl.handle.net/20.500.12272/9683
*
identifier_str_mv Mecánica Computacional Vol XXXV
*
url http://hdl.handle.net/20.500.12272/9683
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
2024-03-11T15:52:46Z
http://creativecommons.org/publicdomain/zero/1.0/
CC0 1.0 Universal
Universidad Tecnológica Nacional. Facultad Regional Mendoza
Atribución
eu_rights_str_mv openAccess
rights_invalid_str_mv 2024-03-11T15:52:46Z
http://creativecommons.org/publicdomain/zero/1.0/
CC0 1.0 Universal
Universidad Tecnológica Nacional. Facultad Regional Mendoza
Atribución
dc.format.none.fl_str_mv pdf
application/octet-stream
dc.source.none.fl_str_mv Mecánica Computacional (35), 819-841. (2017)
reponame:Repositorio Institucional Abierto (UTN)
instname:Universidad Tecnológica Nacional
reponame_str Repositorio Institucional Abierto (UTN)
collection Repositorio Institucional Abierto (UTN)
instname_str Universidad Tecnológica Nacional
repository.name.fl_str_mv Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacional
repository.mail.fl_str_mv gestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.ar
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