CAREER: MULTIPHASE FLUID-MATERIAL INTERACTION: CAVITATION MODELING AND DAMAGE ASSESSMENT

职业：多相流体-材料相互作用：空化建模和损伤评估

• 批准号: 1751487
• 负责人: Kevin Wang
• 金额: $ 52.69万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-01-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1751487&HistoricalAwards=false
• 关键词: CAREER; MULTIPHASE; FLUID; MATERIAL; INTERACTION

Cavitation describes the formation, growth, and violent collapse of bubbles in a liquid when exposed to rapid pressure variations. If carefully controlled, cavitation can be a unique approach for high-precision material modification and fabrication, as it allows high-intensity energy pulses to be generated safely, released remotely, and focused within a small target region. The goal of this project is to understand how cavitation affects solid materials close to the bubbles; and to use this knowledge to be able to predict how cavitation modifies nearby material. The proposed research will provide new scientific insight for a broad range of engineering and biomedical applications, from fabricating materials to curing diseases. The educational and outreach component of the project will directly impact the education of K-12 schoolchildren in Central and Western Virginia, through collaboration with the Center for the Enhancement of Engineering Diversity at Virginia Tech and the Science Museum of Western Virginia in Roanoke, VA.Previous research on cavitation has primarily focused on either the fluid part of the problem, without considering the material's response, or the material part, particularly the macroscopic fracture (e.g., pits, cracks, holes) after multiple cycles of bubble collapse. This project will start with developing and experimentally validating a computational fluid dynamics/computational solid dynamics - coupled model, which will enable direct numerical simulation of up to hundreds of bubbles interacting with a broad range of materials, including fluid-induced damage and fracture. Next, the comprehensive characterization of single bubbles, tandem bubbles, and small bubble clusters collapsing near various materials will create a theoretical foundation for clarifying the micro-scale mechanisms underlying cavitation-induced material damage. Further, the direct numerical simulation model will be used to examine simplified bubbly flow models and, in combination with machine learning, design new models with improved predictive capability.

空化描述了液体中的气泡在压力快速变化时的形成、增长和剧烈破裂。如果仔细控制，空化可以成为高精度材料改性和制造的独特方法，因为它可以安全地产生高强度能量脉冲，远程释放并聚焦在小目标区域内。该项目的目标是了解空化如何影响靠近气泡的固体材料；并利用这些知识来预测空化如何改变附近的材料。拟议的研究将为从制造材料到治疗疾病的广泛工程和生物医学应用提供新的科学见解。通过与弗吉尼亚理工大学工程多样性增强中心和弗吉尼亚州罗阿诺克的西弗吉尼亚科学博物馆合作，该项目的教育和外展部分将直接影响弗吉尼亚州中部和西部的 K-12 学童的教育。先前对空化的研究主要集中在问题的流体部分，而不考虑材料的响应，或者材料部分，特别是多次气泡循环后的宏观断裂（例如凹坑、裂纹、孔洞） 坍塌。该项目将从开发和实验验证计算流体动力学/计算固体动力学耦合模型开始，该模型将能够直接数值模拟多达数百个气泡与各种材料相互作用，包括流体引起的损伤和断裂。接下来，对各种材料附近破裂的单个气泡、串联气泡和小气泡簇的综合表征将为阐明空化引起的材料损伤的微观机制奠定理论基础。此外，直接数值模拟模型将用于检查简化的气泡流模型，并与机器学习相结合，设计具有改进的预测能力的新模型。

项目成果

CFD-CSD coupled analysis of underwater propulsion using a biomimetic fin-and-joint system

使用仿生鳍接头系统对水下推进进行 CFD-CSD 耦合分析

• DOI: 10.1016/j.compfluid.2018.06.014
• 发表时间: 2018-08-01
• 期刊: Computers & Fluids
• 影响因子: 2.8
• 作者: Howard Chung;Shunxiang Cao;M. Philen;P. Beran;Kevin G. Wang
• 通讯作者: Kevin G. Wang

Variations of stress field and stone fracture produced at different lateral locations in a shockwave lithotripter field

冲击波碎石场不同横向位置应力场及结石破裂的变化

• DOI: 10.1121/10.0005823
• 发表时间: 2021-08
• 期刊: The Journal of the Acoustical Society of America
• 作者: Xiang, Gaoming;Ma, Xiaojian;Liang, Cosima;Yu, Hongyang;Liao, Defei;Sankin, Georgy;Cao, Shunxiang;Wang, Kevin;Zhong, Pei
• 通讯作者: Zhong, Pei

Plasma formation in ambient fluid from hypervelocity impacts

超高速撞击在环境流体中形成等离子体

• DOI: 10.1016/j.eml.2022.101927
• 发表时间: 2022-11-01
• 期刊: Extreme Mechanics Letters
• 影响因子: 4.7
• 作者: Shafquat Islam;W. Ma;J. Michopoulos;Kevin Wang
• 通讯作者: Kevin Wang

Shock-induced damage and dynamic fracture in cylindrical bodies submerged in liquid

浸没在液体中的圆柱体的冲击损伤和动态断裂

• DOI: 10.1016/j.ijsolstr.2019.04.002
• 发表时间: 2019-09
• 期刊: International Journal of Solids and Structures
• 影响因子: 3.6
• 作者: Cao, Shunxiang;Zhang, Ying;Liao, Defei;Zhong, Pei;Wang, Kevin G.
• 通讯作者: Wang, Kevin G.

Simulating laser-fluid coupling and laser-induced cavitation using embedded boundary and level set methods

使用嵌入式边界和水平集方法模拟激光流体耦合和激光诱导空化

• DOI: 10.2139/ssrn.4086447
• 发表时间: 2022-09-01
• 期刊: J. Comput. Phys.
• 作者: Xuning Zhao;W. Ma;Kevin Wang
• 通讯作者: Kevin Wang