(改为6月23日9:30)Micro-particle manipulation and enhanced micro-mixing with acoustic microbubble streaming flows
报告题目： Micro-particle manipulation and enhanced micro-mixing with acoustic microbubble streaming flows
报告人: Prof. Cheng Wang
Department of Mechanical Engineering
Missouri University of Science and Technology, USA
Transport phenomena at small length scales play an increasingly important role in many inter-disciplinary fields, such as biomedical engineering and lab-on-a-chip diagnostic technology. At micrometer length scale, external force fields (acoustic forces, electric and magnetic fields, and optical forces) offer effective means to actuate and control micro-hydrodynamic flows as well as particle motions. In this talk, I will present my work on acoustically driven microbubble streaming flows, emphasizing both fundamental understanding and the design and applications of bubble-based microfluidic devices. I will begin with a novel concept of manipulating micro-particles using microbubble-driven streaming flows, and present a number of microfluidic applications, including switching, sorting, enriching and focusing of micro-particles. In the second part, I will talk about frequency dependence of bubble streaming flows, and the correlation between bubble dynamics and streaming flow patterns. This fundamental understanding of frequency dependent streaming flows can guide the proper design of practical microfluidic applications, such as strategies of effective mixing on the micron scale.
Dr. Cheng Wang has been an assistant professor in the Department of Mechanical and Aerospace Engineering at Missouri University of Science and Technology since 2014. He received his Ph.D. in mechanical engineering from the University of Illinois at Urbana-Champaign (UIUC), USA, in 2013. Prior to this, he received his Bachelor (2004) and Master (2006) degrees in mechanical engineering from Nanyang Technological University in Singapore. His research interests include fluid dynamics, microfluidics, droplet and bubble dynamics, acoustic streaming flows, and microscale magneto-fluidics.