Numerical study on immersed granular collapse in viscous regime by particle-scale simulation | |
Sun YH2; Zhang WT(张炆涛)1; Wang XL(王晓亮)2; Liu QQ(刘青泉)2 | |
刊名 | PHYSICS OF FLUIDS |
2020-07-01 | |
卷号 | 32期号:7页码:12 |
ISSN号 | 1070-6631 |
DOI | 10.1063/5.0015110 |
英文摘要 | Mixed fluid-particle flows are commonly found in nature and exhibit complex particle-particle and particle-fluid interactions. In this paper, a typical small-scale case of immersed granular collapse under the viscous regime is numerically investigated using computational fluid dynamics coupled with the discrete element method (CFD-DEM), which provide particle-scale information of the collapse. The input parameters for the coupled CFD-DEM model are carefully calibrated from experimental results, and the simulation results achieve good agreement with the experiments in terms of the front evolution and final deposition. The collapse processes for different aspect ratios exhibit similarities and propagate in a three-stage mode that includes acceleration, steady propagation, and deceleration. The propagation velocity, runout distance, and the energy evolution of both fluid and particles are presented. The final runout is linearly proportional to the densimetric Froude number in our high-column cases. The transition of particles' motion from vertical to horizontal and the drag of the fluid are found to be responsible for the constant velocity in the steady propagation stage. We also show that a small energy bump during the initial stage is the result of particle destabilization and rearrangement. Published under license by AIP Publishing. |
分类号 | 一类/力学重要期刊 |
资助项目 | National Natural Science Foundation of China[11872117] ; National Natural Science Foundation of China[11432015] ; Edanz Group China |
WOS关键词 | FLUIDIZED-BEDS ; FLOW MODEL ; DEM ; DENSE ; PREDICTIONS ; RHEOLOGY |
WOS研究方向 | Mechanics ; Physics |
语种 | 英语 |
WOS记录号 | WOS:000555079000001 |
资助机构 | National Natural Science Foundation of China ; Edanz Group China |
其他责任者 | Liu QQ(刘青泉) |
内容类型 | 期刊论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/84824] |
专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
作者单位 | 1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 2.Beijing Inst Technol, Sch Aerosp Engn, Dept Mech, Beijing 100081, Peoples R China; |
推荐引用方式 GB/T 7714 | Sun YH,Zhang WT,Wang XL,et al. Numerical study on immersed granular collapse in viscous regime by particle-scale simulation[J]. PHYSICS OF FLUIDS,2020,32(7):12. |
APA | Sun YH,Zhang WT,Wang XL,&Liu QQ.(2020).Numerical study on immersed granular collapse in viscous regime by particle-scale simulation.PHYSICS OF FLUIDS,32(7),12. |
MLA | Sun YH,et al."Numerical study on immersed granular collapse in viscous regime by particle-scale simulation".PHYSICS OF FLUIDS 32.7(2020):12. |
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