[Oral Presentation]壁面效应对单分散和多分散颗粒填充密度的影响

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

壁面效应对单分散和多分散颗粒填充密度的影响

ID：126 Submission ID：125 View Protection：ATTENDEE Updated Time：2024-04-10 17:15:06 Hits：555 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

自然界和工业中的颗粒填充常受容器壁影响，因此研究壁面效应至关重要。现有研究多关注单分散球无序填充，对填充状态和边界层定义尚不明晰。本研究提出无量纲边界层厚度

、壁面效应系数

和临界距离

以量化壁面效应。采用Lubachevsky-Stillinger算法和离散元法，我们生成不同密度的单分散球填充及不同组分的双分散、多分散球填充，考察单平板壁的影响。单分散填充致密化过程伴随着边界层生长和结晶，而内部区域保持随机，直到边界层充满整个填充。引入第二种颗粒会弱化壁面效应，特别是粒径比1:0.7的双分散球体。随着粒径比增加，引入更多种颗粒有利于最小化壁面效应。我们拟合了多分散填充中使壁面效应最弱的粒径比和颗粒种类数之间的关系。粒径比为1:0.8:0.6的三分散填充壁面效应显著弱于其他多分散填充，这可能表明其独特的局部结构。对于粒径服从连续分布的多分散填充，

的对数正态分布使

最小，尽管表征边界层对填充密度影响的

和

较大。本工作将加深对壁面效应影响的理解，并为复杂形状边界下的壁面效应研究奠定基础。

Keywords

壁面效应,边界层,受限填充,填充率,多分散颗粒

Speaker

周鑫成

北京大学

Submission Author

周鑫成北京大学

李水乡北京大学

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