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The significance of the trapped kink in granular segregation pattern formation

Lookup NU author(s): Dr Vladimir Zivkovic

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Abstract

In binary-size granular segregation, when the avalanche stops, the surface of the granular bed is raised upstream of the flow layer, forming a local wedge structure, called trapped kink, which is important for segregation pattern formation. In this paper, we established the relationship between the position distribution of trapped kink head and granular segregation patterns. The experimental result shows that the position distribution of the trapped kink head is a log-normal distribution. The core pattern appeared when the standard deviation of the distribution is smaller than 0.4. When the standard deviation of the distribution is larger than 0.4, the segregation pattern would be from the core pattern to the streak pattern. The position distribution of the trapped kink head is affected by factors, the repose angle and the avalanche time. This provides an important theoretical basis for describing the formation of the segregation pattern and improving the segregation model.

Publication metadata

Author(s): Xiu WZ, Li R, Chen Q, Zivkovic V, Yang H

Publication type: Article

Publication status: Published

Journal: Powder Technology

Year: 2023

Volume: 413

Print publication date: 01/01/2023

Online publication date: 29/10/2022

Acceptance date: 25/10/2022

Date deposited: 03/11/2022

ISSN (print): 0032-5910

ISSN (electronic): 1873-328X

Publisher: Elsevier BV

URL: https://doi.org/10.1016/j.powtec.2022.118053

DOI: 10.1016/j.powtec.2022.118053

ePrints DOI: 10.57711/q9p1-sd19

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