[Oral Presentation]粗糙表面对弹塑性微米颗粒碰撞行为的影响

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

粗糙表面对弹塑性微米颗粒碰撞行为的影响

ID：37 Submission ID：98 View Protection：ATTENDEE Updated Time：2024-04-09 22:05:27 Hits：647 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

微米颗粒与表面的碰撞是一种常见的自然现象。以前的研究主要集中颗粒在光滑表面上碰撞，导致与实际情况的偏差。在本研究中，利用傅里叶反变换对不同的高斯粗糙表面进行了重构，并建立数值模型，研究微米颗粒在粗糙表面上的碰撞。系统地研究和描述了表面粗糙度对微米颗粒碰撞行为的影响，并通过RMS粗糙度和相关长度从0.025 μm到0.2 μm的大小进行了仔细研究。考虑到表面粗糙度与颗粒尺寸的相关性，本文主要研究直径为1 μm的颗粒，这是涡轮叶片冷却通道中摄取的一个具有代表性的尺寸。结果表明，均方根粗糙度主要影响凸起的高度，而相关长度主要影响凸起的密度。因此，不考虑附着力的恢复系数(COR)随粗糙度的增加而减小。有趣的是，当相关长度较小时，COR不随速度增加而下降。

Keywords

颗粒碰撞,恢复系数,粗糙表面,微米尺寸

Speaker

彭础琦

河南科技大学

Submission Author

彭础琦河南科技大学

虞跨海河南科技大学

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