[Oral Presentation]浊流中颗粒悬浮与流动结构之间相互关系的数值研究

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

浊流中颗粒悬浮与流动结构之间相互关系的数值研究

ID：94 Submission ID：251 View Protection：ATTENDEE Updated Time：2024-04-09 22:41:18 Hits：429 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

No files

Abstract

浊流是广泛发生在海底、河口等水下自然环境中的含颗粒流动现象，影响水下地貌演化并威胁海底电缆等水工结构物的安全。浊流的输运水平和强度在很大程度上取决于颗粒的悬浮机制。本研究采用CFD-DEM数学模型模拟了不同颗粒浓度和地形条件下的开闸式浊流过程，以探究颗粒的悬浮机制并深化对浊流输运动力学的理解。研究发现，浊流过程中颗粒的自悬浮现象与头部的大尺寸涡结构密切相关，是微观上离散颗粒进出自悬浮状态的宏观表现。本研究还探究了浊流界面Kelvin-Helmholtz不稳定波的涡结构与颗粒悬浮之间的相互关系，并建立了其与浊流雷诺数的关联。在双分散浊流体系中，细颗粒的比例增大有助于浊流输运距离的增加，分散相的偏析强化了分散相间的碰撞过程，影响着颗粒的沉降行为及浊流输运的整体表现。

Keywords

浊流,颗粒悬浮,Kelvin-Helmholtz不稳定波,多分散体系

Speaker

谢佳烽

浙江大学

Submission Author

谢佳烽浙江大学

潘定一浙江大学

胡鹏浙江大学

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