Open AccessEffect of opening angle on dilute-dense flow transition in two-dimensional granular flow
Author(s) -
Decai Huang,
Fengrui Hu,
Kaiming Deng,
Haiping Wu
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.8249
Subject(s) - outflow , volumetric flow rate , materials science , flow (mathematics) , mechanics , contact angle , inflow , granule (geology) , flow coefficient , physics , composite material , meteorology
Computer simulations are performed to investigate the effect of opening angle on dilute-dense flow transition in a two-dimensional granular flow. Two methods, i.e. the fixed inflow rate and the fixed particle number, are adopted. Both results show that larger opening angle results in an increase of maximum outflow rate in dilute-dense flow transition when the opening angle is larger than zero. When granular flow keeps a dilute flow, the outflow rate is irrelative with the opening angle. When the flow becomes a dense flow, the dense flow rate inereases with opening angle increasing. Further studies show that the granules flow out with a higher velocity when the opening angle increases. The linear relationship between maximum outflow rate and granule flow velocity is observed.