Sediment flow in inclined vessels calculated using a multiphase particle-in-cell model for dense particle flows |
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| Institution: | 1. Institute of Applied Mechanics, National Taiwan University, Taipei 106, Taiwan;2. Center of Advanced Study of Theoretical Sciences, National Taiwan University, Taipei 106, Taiwan;1. Tianjin Key Laboratory of Process Measurement and Control, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China;2. Laboratory for Flow Control, Faculty of Engineering, Hokkaido University, N13W8, Sapporo, Hokkaido, 060-8628, Japan;3. Food Process Engineering Laboratory, Swiss Federal Institute of Technology Zürich (ETHZ), LFO E 18, CH-8092, Zürich, Switzerland;4. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Ministry of Education, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China;1. College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, Hunan, China;2. Key Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China |
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| Abstract: | Sedimentation of particles in an inclined vessel is predicted using a two-dimensional, incompressible, multiphase particle-in-cell (MP-PIC) method. The numerical technique solves the governing equations of the fluid phase using a continuum model and those of the particle phase using a Lagrangian model. Mapping particle properties to an Eulerian grid and then mapping back computed stress tensors to particle positions allows a complete solution of sedimentation from a dilute mixture to close-pack. The solution scheme allows for distributions of types, sizes and density of particles, with no numerical diffusion from the Lagrangian particle calculations. The MP-PIC solution method captures the physics of inclined sedimentation which includes the clarified fluid layer under the upper wall, a dense mixture layer above the bottom wall, and instabilities which produce waves at the clarified fluid and suspension interface. Measured and calculated sedimentation rates are in good agreement. |
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