[Oral Presentation]颗粒长细比对斜面密集颗粒流的影响机理研究

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

颗粒长细比对斜面密集颗粒流的影响机理研究

ID：146 Submission ID：159 View Protection：ATTENDEE Updated Time：2024-04-10 17:19:43 Hits：576 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

No files

Abstract

自然界中的颗粒材料总是非球形的，对于颗粒形状如何影响颗粒流动的机理尚未得到充分理解。本文以颗粒的长细比为形状参数，采用离散元方法模拟沿粗糙斜面下滑的密集颗粒流，在宏观层面上，基于Pouliquen流动法则研究不同长细比颗粒的流动性，在微观层面上对颗粒排列、倾向以及转动能力进行分析。宏观结果表明颗粒的流动性随长细比呈S型变化；微观分析结果表明随着长细比增加颗粒更倾向于沿特定方向排列流动，这一排列行为会随着长细比变化逐渐饱和；对于转动能力，颗粒的转动能力只有在长细比超过一定值之后才会受到明显限制，这可能是长细比导致颗粒流动性下降的根本原因之一。颗粒这些微观量的变化趋势能够解释流动性随长细比呈S型变化的原因，但还需要进一步的研究来定量地将这种微观力学分析与宏观流动现象联系起来。未来将进一步研究其他形状参数，如颗粒的扁平度、棱角度等，以全面理解颗粒形状对斜面密集颗粒流的影响机理。

Keywords

颗粒形状,长细比,微观机理,颗粒流,转动能力

Speaker

刘基雄

清华大学

Submission Author

刘基雄清华大学

景路清华大学

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