第32讲

讲座题目：Science of Nanofluidic Energy Conversion

演讲嘉宾：陈曦 教授

时间：2015年6月15日上午9：00-11:00

地点：永利集团会议室501室

摘要：When a liquid phase, whose motion is controlled by pressure, voltage, and/or heat, is confined in a nanoporous material, the ultra-large pore surface area exposed to the liquid becomes an ideal platform for energy conversion, including energy harvesting (convert mechanical or thermal energy into electricity), energy absorption (convert mechanical energy into heat and interface energy) and actuation (convert thermal or electrical energy into mechanical output). The energy conversion efficiency and density are orders-of-magnitude higher than that of conventional materials. The design and optimization of the multifunctional nanocomposite material (with nanoporous matrix and functional liquid filler) are underpinned by the science of nanofluidics, a wide open area where solid mechanics and fluid mechanics meet at the small scale. At the nanoscale, owing to the counterintuitive behaviors of the confined liquid molecules and ions, as well as their unique interaction characteristics with the solid atoms, many conventional fluid mechanics laws break down and new nanofluidic theories are established based on atomistic simulations. The detailed molecular mechanisms of energy conversion between mechanical, thermal, and electric energies are elucidated. The study also provides critical insights for improving the energy conversion processes, and the novel nanofluidic energy conversion system becomes very attractive as the building block of the next-generation multifunctional material systems.

简介：Dr. Xi Chen received his B.S. in Engineering Mechanics from Xi'an Jiaotong University in 1994 (at the age of 18), M.S. in Solid Mechanics from Tsinghua University in 1997, and Ph.D. in Solid Mechanics from Harvard University in 2001. He was a postdoctoral fellow at Harvard University from 2001-2003. He joined Columbia University in Fall 2003 as an Assistant Professor and was promoted to an Associate Professor in winter 2006. He uses multiscale theoretical, experimental, and numerical approaches to investigate various research frontiers in materials addressing challenges in energy and environment, nanomechanics, and mechanobiology. He has published over 180 journal papers with a h-index over 28. He received the NSF CAREER Award in 2007, the Presidential Early Career Award for Scientists and Engineers (PECASE) in 2008 (nominated by NSF), Outstanding Oversea Young Investigator Award from Chinese Natural Science Foundation in 2009, ASME Sia Nemat-Nasser Early Career Award in 2010, SES Young Investigator Medal in 2011, and ASME Thomas J. R. Hughes Young Investigator Award in 2012. He was elected to a Fellow of ASME and 1000 People's Plan of China in 2014.

联系人：许骏 教授

邮件：junxu@buaa.edu.cn