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Water-submerged granular flow through a long efflux tube

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Abstract

This paper presents an experimental investigation on the effect of a long efflux tube on water-submerged granular flow. A cylindrical bin connected to an outlet tube with length to diameter ratio of 100 at the bottom center was used to simulate the discharge processes. Pressure variations at the bin bottom and at the outlet were monitored with transducers. Effects of the tube on free water discharge, dry solid flow and solid and water mixture flow were investigated and compared. Experimental results found that significant negative pressure which can reach as large as the water pressure above the bin bottom was induced by the flow and the pressure gradient at the orifice had significantly increased the mass flow rate. A previously proposed equation with a corrected coefficient was used to fit the measured flow data and a quite well agreement was found.

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Acknowledgements

The writers gratefully acknowledge financial support from the Fundamental Research Funds for the Central Universities, China Postdoctoral Science Foundation (Grant No. 2013M541781) and the Chinese Water Pollution Control Program (Project Number. 2011ZX07301-004).

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Authors and Affiliations

  1. Department of Municipal Engineering, Hefei University of Technology, Hefei, 230009, China

    Shuai Guo

  2. College of Civil Engineering and Architecture, Zhejiang University, A503 Anzhong Building, Hangzhou, 310058, China

    Tingchao Yu & Yiping Zhang

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  1. Shuai Guo
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  2. Tingchao Yu
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Correspondence to Tingchao Yu.

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Conflict of interest

Shuai Guo has received research grants from the Fundamental Research Funds for the Central Universities and China Postdoctoral Science Foundation. Yiping Zhang has received research grants from Chinese Water Pollution Control Program Foundation.

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Guo, S., Yu, T. & Zhang, Y. Water-submerged granular flow through a long efflux tube. Granular Matter 19, 45 (2017). https://doi.org/10.1007/s10035-017-0732-7

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