[Oral Presentation]振动条件下大颗粒在床层中的上升行为数值研究

Organized By

Hohai University

Monash University

Co-organized by

Southeast University

Jiangxi University of Science and Technology

Northeast University

DUT-BSU Scientific Research and Innovation Center

Suzhou University of Science and Technology

State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment

Sponsoring agency

KELI SDEM Software (Dalian) Co., Ltd.

Sugon Smart Computing Information Technology Co., Ltd.

Beijing Paratera Technology Co., Ltd.

Simpop Information Technology Co., Ltd.

Important Dates

Conference Announcement

December 2023, release First Round Announcement
Abstract Submission Deadline
March 31^th, 2024
Paper Submission Deadline
April 30^th, 2024
Registration
From January 1^st, 2024
Conference Schedule
May 31^st (Friday), 2024 On-Site Registration
June 1^st to 3^rd, 2024 Conference

振动条件下大颗粒在床层中的上升行为数值研究

ID：302 Submission ID：370 View Protection：ATTENDEE Updated Time：2024-05-20 09:45:54 Hits：567 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

Session：[No Session] » [No Session Block]

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Abstract

颗粒性质的不同会导致颗粒的偏析现象。一个典型的例子是振动会引发大颗粒在小颗粒床层中向上移动，形成了“巴西坚果效应（BNE）”。然而，先前的研究主要集中于振动加速度参数的影响，而振动频率和振幅参数对BNE的影响及机制还不是很明确，有待进一步研究。因此，本工作采用离散单元法模拟了单一大颗粒在振动条件下发生上升分离的现象，详细探讨并量化了不同振动频率、振幅和颗粒不同尺寸比对大颗粒BNE的影响。结果表明：当振动频率和振幅较小时，几乎不会出现BNE；当频率和振幅到达一定范围时，BNE会增强，但振动频率过高不利于颗粒分离。此外，大颗粒尺寸比较大时，大颗粒上升运动的幅度增加，BNE也更为显著。

Keywords

颗粒材料,巴西坚果效应,离散单元法,颗粒分离

Speaker

马佳

江西理工大学

Submission Author

马佳江西理工大学

周宗彦江西理工大学

Sponsored By

Hohai University

Panel of Computational Mechanics on Granular Materials, Working Party of Computational Mechanics, Chinese Society of Theoretical and Applied Mechanics

Jiangsu Society of Theoretical and Applied Mechanics