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Numerical analysis of solid − liquid two - phase flow on sandstone wastewater of hydropower stations in a rectangular sedimentation tank / X. Ling Wang in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11714-11723 Titre : Numerical analysis of solid − liquid two - phase flow on sandstone wastewater of hydropower stations in a rectangular sedimentation tank Type de document : texte imprimé Auteurs : X. Ling Wang, Auteur ; Tao Li, Auteur ; Jian Lang, Auteur Année de publication : 2011 Article en page(s) : pp. 11714-11723 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Settling  pond  Sedimentation  tank  Waste  water  Two  phase  flow  Numerical  simulation  Numerical  analysis Résumé : The lack of knowledge on water flow and particle behavior of sandstone wastewater in sedimentation tanks of hydropower stations is a significant challenge for the design of these processes. In this study, the Euler-Lagrange two-phase model was applied to study the flow, sedimentation, and particle trajectories in a two-stage rectangular tank that is divided into two sections with different hydraulic retention times. The interfacial momentum transfer, buoyant force, and the collision force were considered, and the Lagrange approach was employed to determine the particle trajectories of the particles. The flow patterns, removal efficiency of the particles, and particle trajectories along the tank were investigated. The experimental and numerical results revealed that the two-stage rectangular tank is efficient in dealing with high turbidity sandstone wastewater. In addition, the simulated removal efficiencies were in good agreement with the experimental results. Last, the sensitivity of particle behavior to the collision force was studied, and the effect of the baffle length on particle settling in the rectangular sedimentation tank was evaluated. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23437872 [article] Numerical analysis of solid − liquid two - phase flow on sandstone wastewater of hydropower stations in a rectangular sedimentation tank [texte imprimé] / X. Ling Wang, Auteur ; Tao Li, Auteur ; Jian Lang, Auteur . - 2011 . - pp. 11714-11723. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11714-11723 Mots-clés : Settling  pond  Sedimentation  tank  Waste  water  Two  phase  flow  Numerical  simulation  Numerical  analysis Résumé : The lack of knowledge on water flow and particle behavior of sandstone wastewater in sedimentation tanks of hydropower stations is a significant challenge for the design of these processes. In this study, the Euler-Lagrange two-phase model was applied to study the flow, sedimentation, and particle trajectories in a two-stage rectangular tank that is divided into two sections with different hydraulic retention times. The interfacial momentum transfer, buoyant force, and the collision force were considered, and the Lagrange approach was employed to determine the particle trajectories of the particles. The flow patterns, removal efficiency of the particles, and particle trajectories along the tank were investigated. The experimental and numerical results revealed that the two-stage rectangular tank is efficient in dealing with high turbidity sandstone wastewater. In addition, the simulated removal efficiencies were in good agreement with the experimental results. Last, the sensitivity of particle behavior to the collision force was studied, and the effect of the baffle length on particle settling in the rectangular sedimentation tank was evaluated. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23437872