Relationship between mass discharge rate and granular temperature of silo flow with variance of outlets--颗粒学报PARTICUOLOGY

Chen, Q., Li, R., Xiu, W., Zivkovic, V., & Yang, H. (2022). Relationship between mass discharge rate and granular temperature of silo flow with variance of outlets. Particuology, 63, 76-82. https://doi.org/10.1016/j.partic.2021.05.001

Relationship between mass discharge rate and granular temperature of silo flow with variance of outlets

Quan Chen ^a, Ran Li ^{a b}, Wengzheng Xiu ^a, Vladimir Zivkovic ^c, Hui Yang ^a *

a School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
b School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
c School of Engineering, Newcastle University, NE1 7RU, United Kingdom

10.1016/j.partic.2021.05.001

Volume 63, April 2022, Pages 76-82

Received 18 January 2021, Revised 22 February 2021, Accepted 5 May 2021, Available online 24 May 2021, Version of Record 18 November 2021.

E-mail: yanghui@usst.edu.cn

Highlights

• A lower granular temperature zone near the orifice in silos was found.

• Granular temperature near the orifice and the MDR are inversely proportional.

• Intermittent clogging is one of the main reasons for the decrease in MDR.

Abstract

A lower granular temperature zone near the orifice in silos was found by speckle visibility spectroscopy technology. Surprisingly, the values of granular temperature in this area are inversely proportional to the mass discharge rate (MDR). This finding that links the macroscopic MDR with mesoscopic dynamics temperature of the particle system, is obtained by looking at the effect that different outlet sizes of silos on MDR and granular temperature field. Apart from evidencing the relevance of a parameter that has been traditionally overlooked in silos, this relationship supposes a benchmark with which to explore the influence of small orifice sizes on MDR. Among these, we found that the frequency of intermittent clogging and their dependence on the size of the outlet.

Graphical abstract

Keywords

Silos; Granular flow; Granular temperature; Mass discharge rate

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