Venkattraman Ayyaswamy

Versatility of low-temperature plasmas: From tunable electronics to agriculture

摘要

Non-equilibrium or low-temperature plasmas have always been known as extremely versatile enabling tools  - thanks to their unique physical and chemical properties. 一个简单 list of their state-of-the-art applications includes nano/microscale materials processing, electronics, medicine, and food/water/energy systems to name a few. 随着成长 emphasis on electrification (as opposed to thermally driven) of various physical/chemical processes, the compelling need to understand and optimize the behavior of low-temperature 等离子体不能被夸大. This talk will summarize the recent work of our group using three representative examples ranging from fundamental to applied plasma science 和工程. 具体地说, the talk will focus on our efforts to advance the understanding of atmospheric pressure microplasmas using a combination of approaches including both computational and physical experiments. The first part of this talk will focus on kinetic simulations of microplasmas ignited at microwave frequencies with emphasis on the electron kinetics, heating modes and their dependence on ignition frequency. An improved understanding of electron dynamics is crucial to optimizing the operation 这些设备. The second part of the talk will focus on the utility of continuum simulations to study the impedance characteristics of microplasmas. 具体地说, it is demonstrated that a given microplasma device can serve either as an inductor or a capacitor depending on the signal frequency thereby paving the way for tunable microplasma-based电子. Finally, our experimental efforts on the role of atmospheric pressure microplasmas on irrigation water treatment and nutrient delivery is presented. 

演讲者的传记

Venkattraman Ayyaswamy is currently an Associate Professor and Undergraduate Program Chair in the Department of 机械工程 at the University of California, 默塞德. He leads a group with interests in the broad area of non-continuum fluid mechanics and plasma science 和工程. His group has developed SOMAFOAM, which is a free and open source software (FOSS) for fluid modeling of low-temperature plasmas. An aerospace engineer by training, he received his PhD in Aero & 普渡大学的Astro in 2012 after receiving his Master’s (also from Purdue) in 2009. 在来之前 the US for graduate education, he got his Bachelor’s degree from the Indian Institute of Technology (IIT) Madras in 2007. Before his current position, he held visiting faculty appointments at Purdue as well as IIT Madras. 他还在 Lawrence Livermore National Lab during his graduate school. 文卡特是一个接受者 of the Hellman Foundation Fellowship, Ramanujan Fellowship (by the Department of 科学 and Technology (India)), Purdue’s finalist for the Chorafas Foundation Awards, Magoon Award for Excellence in Teaching as well as a Young Engineer Fellowship from the Indian 科学研究所.