[Oral Presentation]线性层化水体中水下颗粒坍塌流运动的数值模拟

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

线性层化水体中水下颗粒坍塌流运动的数值模拟

ID：180 Submission ID：357 View Protection：ATTENDEE Updated Time：2024-04-30 10:16:03 Hits：631 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

我们通过颗粒解析直接数值模拟研究了松散堆积颗粒柱在线性分层环境中的坍塌运动，对颗粒流头部速度、沉积形态、能量收支和颗粒-颗粒及颗粒-流体相互作用进行了定量分析。环境流体密度分层阻碍了颗粒流运动，降低其前端速度并产生更短、更厚的最终沉积物，这些效应均可通过幂律关系定量描述。环境流体密度分层会抑制水体卷吸使得界面不稳定的形式由 Kelvin-Helmholtz 不稳定转变为界面波。从能量收支来看，环境流体密度分层显著减少了颗粒势能的转化量使得颗粒势能更多的向流体势能转化。从颗粒间相互作用来看，环境流体密度分层减弱了接触力的大小，法向接触力链与水平方向的夹角主要为 60°到 120°之间。从颗粒-流体相互作用来看，环境流体密度分层抑制了流体力的波动，并使流体力的作用方向由沿各方向均匀分布转变为主要竖直向下。颗粒追踪结果表明，环境流体密度分层抑制了颗粒柱内颗粒的混合。

Keywords

线性层化,颗粒坍塌,颗粒-流体相互作用,颗粒解析直接数值模拟

Speaker

王海宇

浙江大学海洋学院

Submission Author

王海宇浙江大学海洋学院

朱瑞浙江大学海洋学院

贺治国浙江大学海洋学院

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