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Modeling blockage of particles in conduit constrictions / A. J. Parry in Transactions of the ASME . Journal of fluids engineering, Vol. 132 N° 1 (Janvier 2010) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 132 N° 1 (Janvier 2010) . - 10 p. Titre : Modeling blockage of particles in conduit constrictions : dense granular-suspension flow Type de document : texte imprimé Auteurs : A. J. Parry, Auteur ; O. Millet, Auteur Année de publication : 2010 Article en page(s) : 10 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : dense  granular-suspension  flow;  numerical  simulation Résumé : This paper presents a numerical simulation study of dense granular-suspension flow in a conduit with constriction. An empirical function of solid concentrations and Reynolds number prescribes the force between a particle and the fluid. This simplification reduces the computing load of the fine flow-field details around each particle. In the fluid-momentum equation, a source term distributes the force over the particle volume. The study addresses particle-laden flow at constant liquid-flow rate. Two different algorithms of the interparticle contact show that the bridging phenomenon causing the blockage of the particles persists in the presence of the fluid flow. While the particles are in movement, there are frequent interparticle and particle-wall impacts and vigorous fluctuations of the net reaction force on the wall from the particle phase. There is close correlation between the component of this reaction oriented in the flow direction and the rate of change in the pressure drop across the constricted conduit. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] [article] Modeling blockage of particles in conduit constrictions : dense granular-suspension flow [texte imprimé] / A. J. Parry, Auteur ; O. Millet, Auteur . - 2010 . - 10 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 132 N° 1 (Janvier 2010) . - 10 p. Mots-clés : dense  granular-suspension  flow;  numerical  simulation Résumé : This paper presents a numerical simulation study of dense granular-suspension flow in a conduit with constriction. An empirical function of solid concentrations and Reynolds number prescribes the force between a particle and the fluid. This simplification reduces the computing load of the fine flow-field details around each particle. In the fluid-momentum equation, a source term distributes the force over the particle volume. The study addresses particle-laden flow at constant liquid-flow rate. Two different algorithms of the interparticle contact show that the bridging phenomenon causing the blockage of the particles persists in the presence of the fluid flow. While the particles are in movement, there are frequent interparticle and particle-wall impacts and vigorous fluctuations of the net reaction force on the wall from the particle phase. There is close correlation between the component of this reaction oriented in the flow direction and the rate of change in the pressure drop across the constricted conduit. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...]