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Experimental study of the effect of inclination angle on the minimum conveying velocity and the underlying mechanisms
Author(s) -
Zhang Peng,
Sheng Tao,
Huang Zhengliang,
Yang Yao,
Sun Jingyuan,
Wang Jingdai,
Yang Yongrong,
Huang Chenghao,
Huang Zhixiong
Publication year - 2020
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16830
Subject(s) - inclination angle , pressure drop , mechanics , drop (telecommunication) , flow (mathematics) , high speed photography , optics , flow velocity , geometry , physics , mathematics , engineering , mechanical engineering
This work investigated the effect of inclination angle on the minimum conveying velocity and the underlying mechanisms. Results showed that the pressure drop increased first and then decreased with the increasing inclination angle at the same mass flux and superficial gas velocity. The changing trend of minimum conveying velocity ( u min ) and the pressure drop near it can be divided into two types by taking 45° as the boundary, which was consistent with the difference in flow regimes near u min at different inclination angles based on results of high‐speed photography and acoustic emission detection. Furthermore, the pressure drop was decomposed to investigate the underlying mechanism of the changing trend of u min . Results showed that the changing trend of u min was closely related to the particle velocity and the particle velocity obtained by high‐speed photography was in good agreement with the theoretical analysis.