title: Numerical analysis of granular flows in a silo bed on flow regime characterization.
abstract: The flow characteristics of a gravity-driven dense granular flow in a granular bed with a contracted drainage orifice are studied by using discrete element method and quantitative analysis. Three values of discharging rates, ranging from fast to slow dense flows, are investigated. Time variations and derivatives of mean forces and velocities, as well as their respective correlations, are analyzed to quantitatively depict the characteristics of granular flow as well as flow regime categorization. The auto-correlation functions, as well as their Fourier spectrums, are utilized to characterize the differences between the mechanisms of slow and fast granular flows. Finally, it is suggested that the flow regimes of slow and fast flows can be characterized by the kinetic and kinematic flow properties of particles.
authors: Institute of Nuclear and New Energy Technology of Tsinghua University, and The key laboratory of advanced reactor engineering and safety, Ministry of Education, Beijing, 100084, People's Republic of China.
authors: Xingtuan
authors: X
authors: Yang
authors: Institute of Nuclear and New Energy Technology of Tsinghua University, and The key laboratory of advanced reactor engineering and safety, Ministry of Education, Beijing, 100084, People's Republic of China; College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing, People's Republic of China.
authors: Nan
authors: N
authors: Gui
authors: Institute of Nuclear and New Energy Technology of Tsinghua University, and The key laboratory of advanced reactor engineering and safety, Ministry of Education, Beijing, 100084, People's Republic of China; School of Aerospace, Mechanical & Manufacturing Engineering, RMIT University, Melbourne, VIC 3083, Australia.
authors: Jiyuan
authors: J
authors: Tu
authors: Institute of Nuclear and New Energy Technology of Tsinghua University, and The key laboratory of advanced reactor engineering and safety, Ministry of Education, Beijing, 100084, People's Republic of China.
authors: Shengyao
authors: S
authors: Jiang
mesh_terms: D000465:Algorithms; D008962:Models, Theoretical