Steady inlet flow in stenotic geometries: convective and absolute instabilities
Identifieur interne : 002975 ( Istex/Curation ); précédent : 002974; suivant : 002976Steady inlet flow in stenotic geometries: convective and absolute instabilities
Auteurs : M. D. Griffith [Australie, France] ; T. Leweke [France] ; M. C. Thompson [Australie] ; K. Hourigan [Australie]Source :
- Journal of Fluid Mechanics [ 0022-1120 ] ; 2008.
Abstract
Steady inlet flow through a circular tube with an axisymmetric blockage of varying size is studied both numerically and experimentally. The geometry consists of a long, straight tube and a blockage, semicircular in cross-section, serving as a simplified model of an arterial stenosis. The stenosis is characterized by a single parameter, the aim being to highlight fundamental behaviours of constricted flows, in terms of the total blockage. The Reynolds number is varied between 50 and 2500 and the stenosis degree by area between 0.20 and 0.95. Numerically, a spectral-element code is used to obtain the axisymmetric base flow fields, while experimentally, results are obtained for a similar set of geometries, using water as the working fluid. At low Reynolds numbers, the flow is steady and characterized by a jet flow emanating from the contraction, surrounded by an axisymmetric recirculation zone. The effect of a variation in blockage size on the onset and mode of instability is investigated. Linear stability analysis is performed on the simulated axisymmetric base flows, in addition to an analysis of the instability, seemingly convective in nature, observed in the experimental flows. This transition at higher Reynolds numbers to a time-dependent state, characterized by unsteadiness downstream of the blockage, is studied in conjunction with an investigation of the response of steady lower Reynolds number flows to periodic forcing.
Url:
DOI: 10.1017/S0022112008004084
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: Pour aller vers cette notice dans l'étape Curation :002975
Links to Exploration step
ISTEX:DF264D3FCB4215D0D40D9B1226D91541E4A1C57ALe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Steady inlet flow in stenotic geometries: convective and absolute instabilities</title><author><name sortKey="Griffith, M D" sort="Griffith, M D" uniqKey="Griffith M" first="M. D." last="Griffith">M. D. Griffith</name><affiliation wicri:level="1"><mods:affiliation>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146, F-13384 Marseille Cedex 13, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146, F-13384 Marseille Cedex 13</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: martin.griffith@eng.monash.edu.au</mods:affiliation><country wicri:rule="url">Australie</country></affiliation></author><author><name sortKey="Leweke, T" sort="Leweke, T" uniqKey="Leweke T" first="T." last="Leweke">T. Leweke</name><affiliation wicri:level="1"><mods:affiliation>Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146, F-13384 Marseille Cedex 13, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146, F-13384 Marseille Cedex 13</wicri:regionArea></affiliation></author><author><name sortKey="Thompson, M C" sort="Thompson, M C" uniqKey="Thompson M" first="M. C." last="Thompson">M. C. Thompson</name><affiliation wicri:level="1"><mods:affiliation>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800</wicri:regionArea></affiliation></author><author><name sortKey="Hourigan, K" sort="Hourigan, K" uniqKey="Hourigan K" first="K." last="Hourigan">K. Hourigan</name><affiliation wicri:level="1"><mods:affiliation>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:DF264D3FCB4215D0D40D9B1226D91541E4A1C57A</idno><date when="2008" year="2008">2008</date><idno type="doi">10.1017/S0022112008004084</idno><idno type="url">https://api.istex.fr/document/DF264D3FCB4215D0D40D9B1226D91541E4A1C57A/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002975</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002975</idno><idno type="wicri:Area/Istex/Curation">002975</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Steady inlet flow in stenotic geometries: convective and absolute instabilities</title><author><name sortKey="Griffith, M D" sort="Griffith, M D" uniqKey="Griffith M" first="M. D." last="Griffith">M. D. Griffith</name><affiliation wicri:level="1"><mods:affiliation>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146, F-13384 Marseille Cedex 13, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146, F-13384 Marseille Cedex 13</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: martin.griffith@eng.monash.edu.au</mods:affiliation><country wicri:rule="url">Australie</country></affiliation></author><author><name sortKey="Leweke, T" sort="Leweke, T" uniqKey="Leweke T" first="T." last="Leweke">T. Leweke</name><affiliation wicri:level="1"><mods:affiliation>Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146, F-13384 Marseille Cedex 13, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146, F-13384 Marseille Cedex 13</wicri:regionArea></affiliation></author><author><name sortKey="Thompson, M C" sort="Thompson, M C" uniqKey="Thompson M" first="M. C." last="Thompson">M. C. Thompson</name><affiliation wicri:level="1"><mods:affiliation>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800</wicri:regionArea></affiliation></author><author><name sortKey="Hourigan, K" sort="Hourigan, K" uniqKey="Hourigan K" first="K." last="Hourigan">K. Hourigan</name><affiliation wicri:level="1"><mods:affiliation>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering & Division of Biological Engineering, Monash University, Melbourne, Victoria 3800</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Fluid Mechanics</title><title level="j" type="abbrev">J. Fluid Mech.</title><idno type="ISSN">0022-1120</idno><idno type="eISSN">1469-7645</idno><imprint><publisher>Cambridge University Press</publisher><pubPlace>Cambridge, UK</pubPlace><date type="published" when="2008">2008</date><biblScope unit="volume">616</biblScope><biblScope unit="page" from="111">111</biblScope><biblScope unit="page" to="133">133</biblScope></imprint><idno type="ISSN">0022-1120</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-1120</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Steady inlet flow through a circular tube with an axisymmetric blockage of varying size is studied both numerically and experimentally. The geometry consists of a long, straight tube and a blockage, semicircular in cross-section, serving as a simplified model of an arterial stenosis. The stenosis is characterized by a single parameter, the aim being to highlight fundamental behaviours of constricted flows, in terms of the total blockage. The Reynolds number is varied between 50 and 2500 and the stenosis degree by area between 0.20 and 0.95. Numerically, a spectral-element code is used to obtain the axisymmetric base flow fields, while experimentally, results are obtained for a similar set of geometries, using water as the working fluid. At low Reynolds numbers, the flow is steady and characterized by a jet flow emanating from the contraction, surrounded by an axisymmetric recirculation zone. The effect of a variation in blockage size on the onset and mode of instability is investigated. Linear stability analysis is performed on the simulated axisymmetric base flows, in addition to an analysis of the instability, seemingly convective in nature, observed in the experimental flows. This transition at higher Reynolds numbers to a time-dependent state, characterized by unsteadiness downstream of the blockage, is studied in conjunction with an investigation of the response of steady lower Reynolds number flows to periodic forcing.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/Istex/Curation
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002975 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Curation/biblio.hfd -nk 002975 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Asie
|area= AustralieFrV1
|flux= Istex
|étape= Curation
|type= RBID
|clé= ISTEX:DF264D3FCB4215D0D40D9B1226D91541E4A1C57A
|texte= Steady inlet flow in stenotic geometries: convective and absolute instabilities
}}
| This area was generated with Dilib version V0.6.33. |  |