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Enforcing mass conservation in DPM - CFD models of dense particulate flows / C.L. Wu in Chemical engineering journal, Vol. 174 N° 1 (Octobre 2011) 

Public ISBD [article]  in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp.475–481 Titre : Enforcing mass conservation in DPM - CFD models of dense particulate flows Type de document : texte imprimé Auteurs : C.L. Wu, Auteur ; K. Nandakumar, Auteur ; A. S. Berrouk, Auteur Année de publication : 2012 Article en page(s) : pp.475–481 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Mass  conversation  Discrete  particle/element  modeling  Computational  fluid  dynamics  Dense  particulate  flow Résumé : An improved coupling method is proposed to ensure mass conservation in a previously developed DPM-CFD model (C.L. Wu et al., Three-dimensional discrete particle model for gas–solid fluidized bed on unstructured mesh, Chemical Engineering Journal 152 (2009), 514–529). In enforcing the mass balance for the continuous phase in such algorithms using the single phase flow solvers, any heterogeneity in the particle concentration field (caused by clustering of particles) creates non-zero source terms. It is shown that if this is not handled properly, it can create large numerical errors (of up to 10%) and any oscillation in the flow field manifests itself in a similar error in the mass conservation. By using the conservative form of the equations in integral formulation, the coupling between the DPM and CFD models ensures mass conservation on the global scale in the entire domain, even in the presence of local heterogeneities in the flow field. The method also offers a consistent implementation of mass flow boundaries at the inlet. Numerical results show the superiority of the new coupling method over the previous one in conserving mass and handling transport processes in fluidized beds. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S138589471100979X [article] Enforcing mass conservation in DPM - CFD models of dense particulate flows [texte imprimé] / C.L. Wu, Auteur ; K. Nandakumar, Auteur ; A. S. Berrouk, Auteur . - 2012 . - pp.475–481. Génie chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp.475–481 Mots-clés : Mass  conversation  Discrete  particle/element  modeling  Computational  fluid  dynamics  Dense  particulate  flow Résumé : An improved coupling method is proposed to ensure mass conservation in a previously developed DPM-CFD model (C.L. Wu et al., Three-dimensional discrete particle model for gas–solid fluidized bed on unstructured mesh, Chemical Engineering Journal 152 (2009), 514–529). In enforcing the mass balance for the continuous phase in such algorithms using the single phase flow solvers, any heterogeneity in the particle concentration field (caused by clustering of particles) creates non-zero source terms. It is shown that if this is not handled properly, it can create large numerical errors (of up to 10%) and any oscillation in the flow field manifests itself in a similar error in the mass conservation. By using the conservative form of the equations in integral formulation, the coupling between the DPM and CFD models ensures mass conservation on the global scale in the entire domain, even in the presence of local heterogeneities in the flow field. The method also offers a consistent implementation of mass flow boundaries at the inlet. Numerical results show the superiority of the new coupling method over the previous one in conserving mass and handling transport processes in fluidized beds. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S138589471100979X