[Oral Presentation]中等稠密颗粒对高能激波冲击含扰动界面混合的数值模拟

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

中等稠密颗粒对高能激波冲击含扰动界面混合的数值模拟

ID：223 Submission ID：316 View Protection：ATTENDEE Updated Time：2024-04-30 10:32:01 Hits：471 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

No files

Abstract

Richtmyer-Meshkov 不稳定性（RMI）是高能密度物理如惯性约束核聚变（ICF）中重要的流体力学现象。RMI是指激波冲击密度不同的两流体界面时，界面初始小扰动快速发展，进一步诱导界面混合。纯流体界面RMI研究已具规模，然而近20年研究表明ICF过程中存在的离散颗粒相会对RMI过程具有显著影响，但目前研究仍不充分。我们应用适合含颗粒RMI问题的大型MPI程序（CMP-PIC）模拟中等稠密颗粒对初始多模扰动界面RMI的影响。分析表明颗粒大幅影响了混合区宽度的演化规律，在前期稠密颗粒促进混合宽度演化，在反射激波二次冲击后抑制混合宽度演化。颗粒占体效应触发了前期额外的涡量沉积，颗粒与气体的双向耦合削减了后期界面的动量、能量，甚至出现了界面“冻结”现象。我们认为探究多相RMI的流动现象、机理和建立相关模型值得在未来得到学界进一步的关注。

Keywords

激波,界面不稳定性,多相流,高能物理

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