Effects of volumetric fraction and included angle of composite particles on the discharge of binary mixtures in hoppers
作者机构：Institute of Nuclear and New Energy TechnologyCollaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and SafetyMinistry of EducationTsinghua UniversityBeijing 100084China School of EngineeringRMIT UniversityMelbourneVIC 3083Australia
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2020年第18卷第4期
页 面：80-90页
核心收录：
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
基 金：The authors are grateful for research support from the National Natural Science Foundation of China(Grant No.51576211) the Sci-ence Fund for Creative Research Groups of National Natural Science Foundation of China(Grant No.51621062) and the National High Technology Research and Development Program of China(863)(2014AA052701)
主 题：Pebble flow Particle flow Discharge flow Hopper bed Binary mixture Discrete element method
摘 要：The discharge behavior of particles is important in many industrial applications,such as in the core of a pebble bed reactor,which uses a hopper bed filled with many large *** this work,a mixture composed of two particle types,freely discharged from a pebble bed,is simulated using the discreteelement *** is a spherical pebble of diameter equal to that of the fuel pebble of the *** other is a composite particle comprising three spherical pebbles bonded *** included angleαof the three pebbles characterized the particle conformation,which may affect the discharge behavior of the *** effects of volume fraction of the multi-sphere x(equivalent to the number fraction)on the discharge are also *** patterns,number flow rate,discharge velocity,and mean force of the mixture are computed to help in revealing discharge *** results show that increasing eitherαor x reduces the discharge flow *** and correlations give a quantitative evaluation of the independent effects ofαand *** analysis of velocity and force explains the mechanism relevant to the main influencing factorsαand *** results are helpful in gaining a better understanding of the discharge feature of binary mixtures and in providing a quantitative evaluation of the discharge behavior of the reactor core,especially adverse failure conditions.
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