[Oral Presentation]激波驱动的颗粒层内压力演化模式

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

激波驱动的颗粒层内压力演化模式

ID：289 Submission ID：275 View Protection：ATTENDEE Updated Time：2024-05-01 09:11:10 Hits：599 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

采用欧拉-拉格朗日耦合方法对激波颗粒相互作用过程中的压力演化进行了数值研究。激波通过颗粒层传播产生复杂的波系结构:主反射激波、反射压缩波和透射激波。这些复杂的波与颗粒的相互作用影响了颗粒层内的气体压力演变，在上游和下游界面上建立了压力差。由压差驱动的气体渗透随后塑造了最终的稳定压力场。较强的入射冲击和较低的颗粒体积分数导致以复杂波结构为主的压力演化。相反，较弱的入射冲击和较高的颗粒体积分数表明气体渗透在压力演化中起着越来越重要的作用，使得复杂波结构的影响可以忽略不计。定义为传递的激波传播长度与颗粒组合的初始长度之比的无量纲特征长度χ，捕获了这些压力演化模式之间的转变。χ值大于1时表明以复杂波结构为主，显著小于1时表明以气体渗透为主。我们的研究结果揭示了χ与包含入射冲击强度、颗粒体积分数和直径的无量纲传输数之间的双对数线性关系。进一步给出了修正的c与上、下游界面稳态压力的经验表达式，与实验结果一致。

Keywords

气固两相流，激波，CMP-PIC

Speaker

盼盼韩

北京理工大学

Submission Author

盼盼韩北京理工大学

琨薛北京理工大学

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