Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities

Autores
Salinas, Jorge; Balachandar, S.; Shringarpure, Mrugesh; Fedele, Juan; Hoyal, David; Cantero, Mariano Ignacio
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Long-running gravity currents are flows that are submerged beneath a deep layer of quiescent fluid and they travel over long distances along inclined or horizontal surfaces. They are driven by the density difference between the current and the clear ambient fluid above. In this work we present results on highly resolved direct numerical simulations of turbid underflows that involve nearly 1 billion degrees of freedom. We assess the effect of bed slope on the flow statistics. We explore the turbulence dynamics of the interface in the classical sub-A nd supercritical regimes. We investigate the structure of interfacial turbulence and its relation to the turbulence statistic. A transcritical regime is identified where intermittent cascading interfacial instabilities appear. We investigate how departure from the self-sustaining equilibrium state may be the mechanism responsible for this cyclic evolution of the transcritical regime.
Fil: Salinas, Jorge. University of Florida; Estados Unidos
Fil: Balachandar, S.. University of Florida; Estados Unidos
Fil: Shringarpure, Mrugesh. No especifíca;
Fil: Fedele, Juan. No especifíca;
Fil: Hoyal, David. No especifíca;
Fil: Cantero, Mariano Ignacio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Materia
DNS
GRAVITY CURRENT
TURBID UNDERFLOW
TURBIDITY CURRENT
TURBULENCE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/174605
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilitiesSalinas, JorgeBalachandar, S.Shringarpure, MrugeshFedele, JuanHoyal, DavidCantero, Mariano IgnacioDNSGRAVITY CURRENTTURBID UNDERFLOWTURBIDITY CURRENTTURBULENCEhttps://purl.org/becyt/ford/2.3https://purl.org/becyt/ford/2Long-running gravity currents are flows that are submerged beneath a deep layer of quiescent fluid and they travel over long distances along inclined or horizontal surfaces. They are driven by the density difference between the current and the clear ambient fluid above. In this work we present results on highly resolved direct numerical simulations of turbid underflows that involve nearly 1 billion degrees of freedom. We assess the effect of bed slope on the flow statistics. We explore the turbulence dynamics of the interface in the classical sub-A nd supercritical regimes. We investigate the structure of interfacial turbulence and its relation to the turbulence statistic. A transcritical regime is identified where intermittent cascading interfacial instabilities appear. We investigate how departure from the self-sustaining equilibrium state may be the mechanism responsible for this cyclic evolution of the transcritical regime.Fil: Salinas, Jorge. University of Florida; Estados UnidosFil: Balachandar, S.. University of Florida; Estados UnidosFil: Shringarpure, Mrugesh. No especifíca;Fil: Fedele, Juan. No especifíca;Fil: Hoyal, David. No especifíca;Fil: Cantero, Mariano Ignacio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaNational Academy of Sciences2020-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/174605Salinas, Jorge; Balachandar, S.; Shringarpure, Mrugesh; Fedele, Juan; Hoyal, David; et al.; Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities; National Academy of Sciences; Proceedings of the National Academy of Sciences of The United States of America; 117; 31; 8-2020; 18278-182840027-8424CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.2008959117info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:52:30Zoai:ri.conicet.gov.ar:11336/174605instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:52:31.234CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities
title Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities
spellingShingle Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities
Salinas, Jorge
DNS
GRAVITY CURRENT
TURBID UNDERFLOW
TURBIDITY CURRENT
TURBULENCE
title_short Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities
title_full Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities
title_fullStr Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities
title_full_unstemmed Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities
title_sort Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities
dc.creator.none.fl_str_mv Salinas, Jorge
Balachandar, S.
Shringarpure, Mrugesh
Fedele, Juan
Hoyal, David
Cantero, Mariano Ignacio
author Salinas, Jorge
author_facet Salinas, Jorge
Balachandar, S.
Shringarpure, Mrugesh
Fedele, Juan
Hoyal, David
Cantero, Mariano Ignacio
author_role author
author2 Balachandar, S.
Shringarpure, Mrugesh
Fedele, Juan
Hoyal, David
Cantero, Mariano Ignacio
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv DNS
GRAVITY CURRENT
TURBID UNDERFLOW
TURBIDITY CURRENT
TURBULENCE
topic DNS
GRAVITY CURRENT
TURBID UNDERFLOW
TURBIDITY CURRENT
TURBULENCE
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.3
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Long-running gravity currents are flows that are submerged beneath a deep layer of quiescent fluid and they travel over long distances along inclined or horizontal surfaces. They are driven by the density difference between the current and the clear ambient fluid above. In this work we present results on highly resolved direct numerical simulations of turbid underflows that involve nearly 1 billion degrees of freedom. We assess the effect of bed slope on the flow statistics. We explore the turbulence dynamics of the interface in the classical sub-A nd supercritical regimes. We investigate the structure of interfacial turbulence and its relation to the turbulence statistic. A transcritical regime is identified where intermittent cascading interfacial instabilities appear. We investigate how departure from the self-sustaining equilibrium state may be the mechanism responsible for this cyclic evolution of the transcritical regime.
Fil: Salinas, Jorge. University of Florida; Estados Unidos
Fil: Balachandar, S.. University of Florida; Estados Unidos
Fil: Shringarpure, Mrugesh. No especifíca;
Fil: Fedele, Juan. No especifíca;
Fil: Hoyal, David. No especifíca;
Fil: Cantero, Mariano Ignacio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
description Long-running gravity currents are flows that are submerged beneath a deep layer of quiescent fluid and they travel over long distances along inclined or horizontal surfaces. They are driven by the density difference between the current and the clear ambient fluid above. In this work we present results on highly resolved direct numerical simulations of turbid underflows that involve nearly 1 billion degrees of freedom. We assess the effect of bed slope on the flow statistics. We explore the turbulence dynamics of the interface in the classical sub-A nd supercritical regimes. We investigate the structure of interfacial turbulence and its relation to the turbulence statistic. A transcritical regime is identified where intermittent cascading interfacial instabilities appear. We investigate how departure from the self-sustaining equilibrium state may be the mechanism responsible for this cyclic evolution of the transcritical regime.
publishDate 2020
dc.date.none.fl_str_mv 2020-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/174605
Salinas, Jorge; Balachandar, S.; Shringarpure, Mrugesh; Fedele, Juan; Hoyal, David; et al.; Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities; National Academy of Sciences; Proceedings of the National Academy of Sciences of The United States of America; 117; 31; 8-2020; 18278-18284
0027-8424
CONICET Digital
CONICET
url http://hdl.handle.net/11336/174605
identifier_str_mv Salinas, Jorge; Balachandar, S.; Shringarpure, Mrugesh; Fedele, Juan; Hoyal, David; et al.; Soft transition between subcritical and supercritical currents through intermittent cascading interfacial instabilities; National Academy of Sciences; Proceedings of the National Academy of Sciences of The United States of America; 117; 31; 8-2020; 18278-18284
0027-8424
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.2008959117
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv National Academy of Sciences
publisher.none.fl_str_mv National Academy of Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269164249546752
score 13.13397

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