Two-phase flow measurements in turbulent hydraulic jumps
Identifieur interne : 007F96 ( Main/Exploration ); précédent : 007F95; suivant : 007F97Two-phase flow measurements in turbulent hydraulic jumps
Auteurs : F. Murzyn [France] ; H. Chanson [Australie]Source :
- Chemical engineering research & design [ 0263-8762 ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Ecoulement diphasique, Procédé fabrication, Cours eau, Ecoulement canal, Ecoulement conduite, Cisaillement, Nombre Froude, Nombre Reynolds, Profil profondeur, Distribution concentration, Fraction vide, Bulle, Coefficient diffusion, Ecoulement jet, Analyse donnée, Loi probabilité, Fonction répartition, Diffusion.
English descriptors
- KwdEn :
Abstract
Hydraulic jumps are commonly experienced in industrial applications and manufacturing processes, as well in rivers and canals. The hydraulic jump is the sudden transition from a high-velocity open channel flow to a subcritical flow motion. Despite nearly two centuries of studies, there is still a lack of knowledge on the two-phase flow properties of the turbulent shear layer and the roller. New series of experimental measurements were conducted in hydraulic jumps with Froude numbers between 5 and 8.5, and inflow Reynolds numbers between 38,000 and 62,000. The two-phase flow measurements included some vertical profiles of void fraction, bubble count rate, interfacial velocity and bubble chords. In the air-water shear region, the void fraction and bubble count rate distributions exhibited marked peaks, with the maximum of void fraction always above the location of the maximum bubble count rate. The dimensionless turbulent diffusivity coefficient was estimated. The dimensionless distributions of interfacial velocity compared favourably with some wall-jet flow equations. The data analysis showed that the mean bubble chord in the turbulent shear layer was between 1 mm and 6 mm. The probability distribution functions (PDF) of bubble chord time illustrated a broad spectrum with predominance to small bubbles compared to the mean.
Affiliations:
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Chanson</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Division of Civil Engineering, The University of Queensland</s1><s2>Brisbane, Qld 4072</s2><s3>AUS</s3><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, Qld 4072</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">09-0263886</idno><date when="2009">2009</date><idno type="stanalyst">PASCAL 09-0263886 INIST</idno><idno type="RBID">Pascal:09-0263886</idno><idno type="wicri:Area/PascalFrancis/Corpus">002D55</idno><idno type="wicri:Area/PascalFrancis/Curation">003265</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">002729</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">002729</idno><idno type="wicri:doubleKey">0263-8762:2009:Murzyn F:two:phase:flow</idno><idno type="wicri:Area/Main/Merge">008698</idno><idno type="wicri:Area/Main/Curation">007F96</idno><idno type="wicri:Area/Main/Exploration">007F96</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Two-phase flow measurements in turbulent hydraulic jumps</title><author><name sortKey="Murzyn, F" sort="Murzyn, F" uniqKey="Murzyn F" first="F." last="Murzyn">F. Murzyn</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>ESTACA Campus Ouest, Parc Universitaire de Laval-Changé, Rue Georges Charpak, BP 76121</s1><s2>53061 Laval</s2><s3>FRA</s3><sZ>1 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Pays de la Loire</region><settlement type="city">Laval</settlement></placeName></affiliation></author><author><name sortKey="Chanson, H" sort="Chanson, H" uniqKey="Chanson H" first="H." last="Chanson">H. Chanson</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Division of Civil Engineering, The University of Queensland</s1><s2>Brisbane, Qld 4072</s2><s3>AUS</s3><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, Qld 4072</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Chemical engineering research & design</title><title level="j" type="abbreviated">Chem. eng. res. des.</title><idno type="ISSN">0263-8762</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Chemical engineering research & design</title><title level="j" type="abbreviated">Chem. eng. res. des.</title><idno type="ISSN">0263-8762</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bubble</term><term>Channel flow</term><term>Concentration distribution</term><term>Data analysis</term><term>Depth profile</term><term>Diffusion</term><term>Diffusion coefficient</term><term>Distribution function</term><term>Froude number</term><term>Jet flow</term><term>Manufacturing process</term><term>Pipe flow</term><term>Probability distribution</term><term>Reynolds number</term><term>Shear</term><term>Stream</term><term>Two phase flow</term><term>Void fraction</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Ecoulement diphasique</term><term>Procédé fabrication</term><term>Cours eau</term><term>Ecoulement canal</term><term>Ecoulement conduite</term><term>Cisaillement</term><term>Nombre Froude</term><term>Nombre Reynolds</term><term>Profil profondeur</term><term>Distribution concentration</term><term>Fraction vide</term><term>Bulle</term><term>Coefficient diffusion</term><term>Ecoulement jet</term><term>Analyse donnée</term><term>Loi probabilité</term><term>Fonction répartition</term><term>Diffusion</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Hydraulic jumps are commonly experienced in industrial applications and manufacturing processes, as well in rivers and canals. The hydraulic jump is the sudden transition from a high-velocity open channel flow to a subcritical flow motion. Despite nearly two centuries of studies, there is still a lack of knowledge on the two-phase flow properties of the turbulent shear layer and the roller. New series of experimental measurements were conducted in hydraulic jumps with Froude numbers between 5 and 8.5, and inflow Reynolds numbers between 38,000 and 62,000. The two-phase flow measurements included some vertical profiles of void fraction, bubble count rate, interfacial velocity and bubble chords. In the air-water shear region, the void fraction and bubble count rate distributions exhibited marked peaks, with the maximum of void fraction always above the location of the maximum bubble count rate. The dimensionless turbulent diffusivity coefficient was estimated. The dimensionless distributions of interfacial velocity compared favourably with some wall-jet flow equations. The data analysis showed that the mean bubble chord in the turbulent shear layer was between 1 mm and 6 mm. The probability distribution functions (PDF) of bubble chord time illustrated a broad spectrum with predominance to small bubbles compared to the mean.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Pays de la Loire</li></region><settlement><li>Laval</li></settlement></list><tree><country name="France"><region name="Pays de la Loire"><name sortKey="Murzyn, F" sort="Murzyn, F" uniqKey="Murzyn F" first="F." last="Murzyn">F. Murzyn</name></region></country><country name="Australie"><noRegion><name sortKey="Chanson, H" sort="Chanson, H" uniqKey="Chanson H" first="H." last="Chanson">H. Chanson</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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