[Oral Presentation]含沙大气表面层近壁跃移颗粒的聚集特征

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

含沙大气表面层近壁跃移颗粒的聚集特征

ID：61 Submission ID：176 View Protection：ATTENDEE Updated Time：2024-04-09 22:26:14 Hits：527 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

高雷诺数含沙流动这类极具自然价值以及工程背景的流动形式中，丰富的近壁跃移颗粒的空间分布受到了广泛的关注。但对其空间分布变化的研究较少，并且缺少对其时间标度特征描述。通过在甘肃民勤青土湖观测列阵中所获得的高质量近壁跃移颗粒数据，分析了在沙尘暴过程中近壁跃移颗粒簇结构特征。结果表明，近壁输沙强度表现出明显的多尺度特征，其相干尺度随高度的升高逐渐减小，随质量负载的增大逐渐增大。跃移颗粒簇结构的数密度随其尺度变化满足-2次方幂律衰减，与经典附着涡结构的衰减指数一致。除此之外，跃移颗粒结构的特征尺度被发现存在颗粒粒径依赖性，通过推导得到其时间尺度随斯托克斯数与雷诺数的比值的线性关系，并得到实测结果的证实。

Keywords

大气表面层,，含沙流动,跃移颗粒,结构特征

Speaker

何熙波

兰州大学湍流颗粒研究中心

Submission Author

何熙波兰州大学湍流颗粒研究中心

刘洪佑兰州大学湍流颗粒研究中心

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