Plasma Breakdown and Instabilities in the Multiphase Plasma-Gas Bubble-Liquid System

多相等离子体-气体-气泡-液体系统中的等离子体击穿和不稳定性

基本信息

批准号：
2107901
负责人：
Katharina Stapelmann
金额：
$ 49.07万
依托单位：
North Carolina State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-05-01 至 2025-04-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2107901&HistoricalAwards=false
关键词：
Plasma Breakdown Instabilities Multiphase Gas

项目摘要

This research project will study the interaction of air bubbles in water with atmospheric pressure plasma – the fourth state of matter composed of charged ions and electrons, neutral atoms and molecules, and a variety of reactive species. Gas/liquid systems with steep property changes consisting of plasma, gas, and liquid have incredible promise for many applications ranging from water cleaning to agriculture applications and plasma-activated liquids for medical use. Although much progress has been made in understanding plasma-liquid interactions - including the development of the first upscaled devices for the degradation of fluorinated organic compounds known as "forever molecules" - to date there have been only a few detailed investigations on plasma breakdown mechanisms in the multiphase plasma-bubble-liquid system. The multiphase system itself and the electrical breakdown mechanisms in such systems are not well understood, hampering efficient use of plasma-bubble-liquid systems. Exploration of such systems conducted within this project will benefit society, potentially leading to new emerging applications to solve problems like groundwater contamination, bacterial contamination of hospital wastewater, providing fertilizer on-farm, and reducing the amount of water needed for irrigation in times when water is becoming increasingly precious.Although extensive research has been performed on plasma-liquid interactions, this multidisciplinary topic still challenges the scientific community. The introduction of gas bubbles is of great interest because it opens another degree of freedom in this multiphase system that influences the plasma behavior. Furthermore, bubbles are ubiquitous in liquids, and additional bubbles can be produced throughout the liquid by energy transport at the plasma-liquid interface. Thus, the behavior of bubbles and the impact of bubbles on the formation of plasma are of great interest for the whole plasma-liquid scientific community. This project addresses the critical need for developing a fundamental quantitative understanding of the bubble – from bubble formation, the interaction of the gas bubbles with the electric field, plasma interaction, to its impact on the electrical breakdown by combining multiphase modeling and experiments. Interface instabilities after electrical breakdown have been observed in previous research, but no fundamental explanation for this behavior has been found. The multiphase plasma-bubble-liquid simulations will comprehensively address this complex system. This project will explore the electrical breakdown in the multiphase plasma-bubble-liquid system, correlate the bubble properties to electrical breakdown conditions, and explore the gas/liquid interface instabilities after electrical breakdown. The combination of experiments and simulations will enable fundamental understanding of the breakdown and instabilities in the multiphase plasma-bubble-liquid system.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该研究项目将研究水中气泡与大气压力等离子体的相互作用 - 由带电的离子和电子，中性原子和分子以及各种反应性物种组成的物质的第四个状态。具有蒸汽特性变化的气体/液体系统包括等离子体，气体和液体的液体变化，对于从清洗到可愉快的应用以及血浆激活液体的许多应用都具有令人难以置信的希望。尽管在理解血浆液相互作用方面已经取得了很大进展 - 包括开发了第一台被称为“永远的分子”的氟化有机化合物降解的设备 - 迄今为止，只有一些详细的研究对多酶质量纤维化纤维液体系统中的质量分解机制进行了少数详细的研究。多相系统本身和此类系统中的电崩解机制尚不清楚，从而有效地使用了血浆粉液系统。探索该项目中进行的此类系统将使社会受益，这可能导致新的新兴应用，以解决地下水污染，细菌对医院废水的污染，提供肥料在农场上，并减少水的灌溉量越来越多，而水上越来越多的珍贵研究一直在质疑跨越的互动中，这是对等级的互动，这是该互动的跨性别疗法。引入气泡引起了极大的关注，因为它在影响等离子体行为的多相系统中开放了另一种自由度。此外，气泡在液体中无处不在，并且可以通过等离子体液界面的能量传输在整个液体中产生其他气泡。对于整个等离子液体科学界来说，气泡的行为和气泡对等离子体形成的影响引起了极大的兴趣。该项目解决了对气泡开发基本定量理解的关键需求 - 从气泡形成，气泡与电场的相互作用，等离子体相互作用，到通过结合多相建模和实验来影响电力崩溃的影响。在先前的研究中已经观察到了电崩解后的界面不稳定性，但没有发现此行为的基本解释。多相气泡液体模拟将全面解决该复杂系统。该项目将探索多相止血液系统中的电击穿，将气泡特性与电崩溃条件相关联，并在电解后探索气体/液体界面不稳定性。实验和仿真的结合将使多相质量 - 泡沫液体系统中的分解和不稳定性的基本了解。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响标准来评估NSF的法定任务。