Clogging transition of granular flow in porous structures

被引:0
|
作者
Fang, Wenchao [1 ]
Chen, Sheng [1 ]
Li, Shuiqing [2 ]
Zuriguel, Iker [3 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
[2] Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China
[3] Univ Navarra, Fac Ciencias, Dept Fis, E-31080 Pamplona, Spain
来源
PHYSICAL REVIEW RESEARCH | 2024年 / 6卷 / 03期
关键词
NUMERICAL-SIMULATION; PARTICLES; DYNAMICS; DISCHARGE;
D O I
10.1103/PhysRevResearch.6.033046
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The clogging transition of granular flow through a disordered porous structure is investigated by threedimensional discrete element simulations. Results reveal the existence of an intermittent flow state, which has been already observed for active particles or agitated grains, but is absent in single-pore flows of passive particles. Interestingly, the analysis of the intermittent dynamics shows similar attributes to the bottleneck flow of active grains, i.e., exponential distribution of flowing intervals and power-law tails for the clogging times. Precisely, based on the exponent of the power-law tail, a clogging phase diagram for porous structures is proposed in the plane of the scaled pore size D/dp and the friction coefficient mu s. Then, we demonstrate that the intermittency arises from a delay in the dissipation of particles' kinetic energy after clogging imposed by the porous structure. Finally, the maximum achievable particle flow rate driven by gravity is predicted from the Froude number Frm, which linearly scales with the pore size and the friction coefficient.
引用
收藏
页数:11
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