Regions Development and Convection Motion in Horizontally Vibrated Granular System

Abdul Rehmana, Sana Shoukatb, Ping Wua, Li Wangc aSchool of Mathematics and Physics, University of Science & Technology Beijing, Beijing, 100083, China bCollege of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China cSchool of Energy and Environmental Engineering, University of Science & Technology Beijing, Beijing, 100083, China

Received: September 5, 2017

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This research examined a horizontally vibrated monolayer of granular particles system at 5, 10, and 15 Hz frequencies and dimensionless acceleration Γp varied from 0.8 to 1.4. Different modes of convection such as non-convection mode, two rolls convection mode, one roll clockwise convection mode, one roll anticlockwise convection mode and different density regions such as 3D state, gassy, empty, cluster and solid regions were observed in the system. Empty region size affects the densities of all regions and no prominent effect of cluster region was observed on convection modes. Kinetic energy ratio of gassy and solid regions μ=kg/ks described the modes of convection. When μ=0.02 non-convection mode, μ=5.36 two rolls convection mode, μ=6.23 3D state mode and one roll convection mode, μ=6.85 one roll clockwise convection mode, and μ=8.76 one roll anticlockwise convection mode were observed in the system.

DOI:10.12693/APhysPolA.134.484 topics: pattern selection (fluid dynamics), convection, rheology of complex fluids