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Su J, Zhou C, Ren G, Qiao Z, Chen Y. Improving biomass mixture separation efficiency in multiple inclined channels of gas–solid fluidized bed: CFD-DEM simulation and orthogonal experiment. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.118066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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The movement law and orientation control of rectangular particles in the viscous fluid domain based on IS-FEM. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Lakshminarasimha S, Maurya A, Gupta GS, Arun Chaitanya GV. Quantification of powder holdups in the presence of a cavity with lateral gas–powder injection in a packed bed. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Abhinav Maurya
- Department of Materials Engineering Indian Institute of Science Bengaluru India
| | - Govind Sharan Gupta
- Department of Materials Engineering Indian Institute of Science Bengaluru India
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Pressure drop in sintered wicks with spherical or irregular particles. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.02.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Löwer E, Pfaff F, Leißner T, Peuker UA. Neighborhood Relationships of Widely Distributed and Irregularly Shaped Particles in Partially Dewatered Filter Cakes. Transp Porous Media 2021. [DOI: 10.1007/s11242-021-01600-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
AbstractA more thorough understanding of the properties of bulk material structures in solid–liquid separation processes is essential to understand better and optimize industrially established processes, such as cake filtration, whose process outcome is mainly dependent on the properties of the bulk material structure. Here, changes of bulk properties like porosity and permeability can originate from local variations in particle size, especially for non-spherical particles. In this study, we mix self-similar fractions of crushed, irregularly shaped Al2O3 particles (20 to 90 µm and 55 to 300 µm) to bimodal distributions. These mixtures vary in volume fraction of fines (0, 20, 30, 40, 50, 60 and 100 vol.%). The self-similarity of both systems serves the improved parameter correlation in the case of multimodal distributed particle systems. We use nondestructive 3D X-ray microscopy to capture the filter cake microstructure directly after mechanical dewatering, whereby we give particular attention to packing structure and particle–particle relationships (porosity, coordination number, particle size and corresponding hydraulic isolated liquid areas). Our results reveal widely varying distributions of local porosity and particle contact points. An average coordination number (here 5.84 to 6.04) is no longer a sufficient measure to describe the significant bulk porosity variation (in our case, 40 and 49%). Therefore, the explanation of the correlation is provided on a discrete particle level. While individual particles < 90 µm had only two or three contacts, others > 100 µm took up to 25. Due to this higher local coordination number, the liquid load of corresponding particles (liquid volume/particle volume) after mechanical dewatering increases from 0.48 to 1.47.
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