[Oral Presentation]楔形体作用下超临界颗粒流颗粒激波的数值模拟研究

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

楔形体作用下超临界颗粒流颗粒激波的数值模拟研究

ID：130 Submission ID：81 View Protection：ATTENDEE Updated Time：2024-04-10 17:16:02 Hits：404 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

雪崩、泥石流等大型地球物理流动灾害流经障碍物时往往出现流动深度与速度的急剧变化，研究颗粒物质在障碍物周围的流动对设计防灾结构及理解灾害现象有重要意义。本文基于垂向积分Savage-Hutter模型建立了能够表征斜坡超临界重力驱动颗粒流与结构物作用过程及稳态现象的动力学模型，尤其是能够精确捕捉结构物附近颗粒激波及预测颗粒真空长度，验证了Cui等人[1]绕圆柱体颗粒自由表面流动实验给出的颗粒真空长度与净加速度角的幂律关系。基于此动力学模型研究了斜坡上放置不同转向角的楔形体结构物形成颗粒激波的情形，发现存在三种模式，分别是附着斜激波模式、附着弓形激波模式及脱离弓形激波模式。转向角小于临界值时，流动冲击楔形体在其表面形成附着的颗粒激波。转向角较小，附着的颗粒激波呈弱斜激波形态，转向角增大，附着激波呈逐渐增强的弓形。转向角大于临界值时，颗粒激波最终脱离结构物，在其上游形成驻定的弓形激波。

Keywords

冲击,颗粒真空,激波,碎屑流灾害

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