Discrete Element Method Investigation of Binary Granular Flows with Different Particle Shapes
The effects of particle shape differences on binary mixture shear flows are investigated using the Discrete Element Method (DEM). The binary mixtures consist of frictionless rods and disks, which have the same volume but significantly different shapes. In the shear flows, stacking structures of rods...
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MDPI AG
2020-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/7/1841 |
| _version_ | 1797570955843731456 |
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| author | Yi Liu Zhaosheng Yu Jiecheng Yang Carl Wassgren Jennifer Sinclair Curtis Yu Guo |
| author_facet | Yi Liu Zhaosheng Yu Jiecheng Yang Carl Wassgren Jennifer Sinclair Curtis Yu Guo |
| author_sort | Yi Liu |
| collection | DOAJ |
| description | The effects of particle shape differences on binary mixture shear flows are investigated using the Discrete Element Method (DEM). The binary mixtures consist of frictionless rods and disks, which have the same volume but significantly different shapes. In the shear flows, stacking structures of rods and disks are formed. The effects of the composition of the mixture on the stacking are examined. It is found that the number fraction of stacking particles is smaller for the mixtures than for the monodisperse rods and disks. For binary mixtures with small particle shape differences, the mixture stresses are bounded by the stresses of the two corresponding monodisperse systems. However, for binary mixtures with large particle shape differences, the stresses of the mixtures can be larger than the stresses of the monodisperse systems at large solid volume fractions because larger differences in particle shape cause geometrical interference in packing, leading to stronger particle–particle interactions in the flow. The stresses in dense binary mixtures are found to be exponential functions of the order parameter, which is a measure of particle alignment. Based on the simulation results, an empirical expression for the bulk friction coefficient (ratio of the shear stress to normal stress) for dense binary flows is proposed by accounting for the effects of particle alignment and solid volume fraction. |
| first_indexed | 2024-03-10T20:32:46Z |
| format | Article |
| id | doaj.art-38e2166b5d9041ae83779bc20014c3a7 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T20:32:46Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-38e2166b5d9041ae83779bc20014c3a72023-11-19T21:15:20ZengMDPI AGEnergies1996-10732020-04-01137184110.3390/en13071841Discrete Element Method Investigation of Binary Granular Flows with Different Particle ShapesYi Liu0Zhaosheng Yu1Jiecheng Yang2Carl Wassgren3Jennifer Sinclair Curtis4Yu Guo5Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, ChinaDepartment of Engineering Mechanics, Zhejiang University, Hangzhou 310027, ChinaDepartment of Chemical Engineering, University of California Davis, Davis, CA 95616, USASchool of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USADepartment of Chemical Engineering, University of California Davis, Davis, CA 95616, USADepartment of Engineering Mechanics, Zhejiang University, Hangzhou 310027, ChinaThe effects of particle shape differences on binary mixture shear flows are investigated using the Discrete Element Method (DEM). The binary mixtures consist of frictionless rods and disks, which have the same volume but significantly different shapes. In the shear flows, stacking structures of rods and disks are formed. The effects of the composition of the mixture on the stacking are examined. It is found that the number fraction of stacking particles is smaller for the mixtures than for the monodisperse rods and disks. For binary mixtures with small particle shape differences, the mixture stresses are bounded by the stresses of the two corresponding monodisperse systems. However, for binary mixtures with large particle shape differences, the stresses of the mixtures can be larger than the stresses of the monodisperse systems at large solid volume fractions because larger differences in particle shape cause geometrical interference in packing, leading to stronger particle–particle interactions in the flow. The stresses in dense binary mixtures are found to be exponential functions of the order parameter, which is a measure of particle alignment. Based on the simulation results, an empirical expression for the bulk friction coefficient (ratio of the shear stress to normal stress) for dense binary flows is proposed by accounting for the effects of particle alignment and solid volume fraction.https://www.mdpi.com/1996-1073/13/7/1841granular shear flowbinary mixture of different particle shapesparticle-phase stressparticle stacking and orderingdiscrete element method |
| spellingShingle | Yi Liu Zhaosheng Yu Jiecheng Yang Carl Wassgren Jennifer Sinclair Curtis Yu Guo Discrete Element Method Investigation of Binary Granular Flows with Different Particle Shapes Energies granular shear flow binary mixture of different particle shapes particle-phase stress particle stacking and ordering discrete element method |
| title | Discrete Element Method Investigation of Binary Granular Flows with Different Particle Shapes |
| title_full | Discrete Element Method Investigation of Binary Granular Flows with Different Particle Shapes |
| title_fullStr | Discrete Element Method Investigation of Binary Granular Flows with Different Particle Shapes |
| title_full_unstemmed | Discrete Element Method Investigation of Binary Granular Flows with Different Particle Shapes |
| title_short | Discrete Element Method Investigation of Binary Granular Flows with Different Particle Shapes |
| title_sort | discrete element method investigation of binary granular flows with different particle shapes |
| topic | granular shear flow binary mixture of different particle shapes particle-phase stress particle stacking and ordering discrete element method |
| url | https://www.mdpi.com/1996-1073/13/7/1841 |
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