[Oral Presentation]高低流速区浊流冲刷侵蚀河床特点及机理探讨

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

高低流速区浊流冲刷侵蚀河床特点及机理探讨

ID：193 Submission ID：355 View Protection：ATTENDEE Updated Time：2024-04-30 10:24:09 Hits：494 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

采用海底沉积地貌特征来反推浊流定量特征被广泛采用，但反推的浊流强度与过程能否造成相应的沉积地貌特征确缺乏验证。采用浊流数值模型正演分析了西非边缘Rio Muni盆地的台阶状地貌能否由基于满水假定的浊流冲淤产生。研究发现了两类具有截然不同性质的高流速和低流速浊流，并基于冲淤平衡状态推导了区分高低流速浊流的流速阈值：对于低流速浊流，浊流侵蚀能力随流速增加而增强，输沙能力与颗粒粒径成反比；但高流速浊流的侵蚀能力受流速影响小、处于稳定的强侵蚀状态，输沙能力与粒径成正比。西非边缘Rio Muni盆地的台阶状地貌自上游到下游呈现出侵蚀性向淤积性的转变，而基于满水假定反推的浊流状态位于高流速区，无法冲淤形成该特定类型台阶状地貌。较小尺度的浊流无需满水假定，属于低速型浊流，可能会因水流减速而产生从侵蚀型向淤积型转变的台阶状地貌。

Keywords

浊流，流速，泥沙粒径，冲刷

Speaker

胡鹏

浙江大学

Submission Author

胡鹏浙江大学

李阅浙江大学

吕冰晗浙江大学

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