|
报告题目：Recent Work on Bubble Nucleation and Growth Dynamics
报告人：郑平教授（中国科学院院士、上海交通大学工程热物理研究所名誉所长）
报告时间：9月9日(周一)14：00—16：30
报告地点：玉泉校区邵逸夫科学馆演讲厅
欢迎广大师生前往!
浙江大学能源工程学系
2013年9月3日
Micro Bubble Nucleation and Growth Dynamics
in Pool Boiling
Prof. Ping Cheng, member of Chinese Academic of Sciences
School of Mechanical Engineering,Shanghai Jiaotong University
Shanghai 200240, P. R. China
Abstract：Boiling heat transfer occurs in many energy conversion systems. The physical process, involving bubble nucleation, growth and departure from a heated surface and it subsequent coalescences, with interphase heat and mass transfer taking place within each bubble, is very complex. In spite of intensive research during the past 80 years, fundamental understanding of the physical process in boiling heat transfer is not well understood. For this reason, empirical correlations for boiling heat transfer coefficient and critical heat flux have been obtained for specific applications, and very few theoretical work has been carried out. In this lecture, we will report some of our analytical, numerical and experimental investigations on a single bubble nucleation and growth process in pool boiling. Thermodynamic analyses, based on the changes in Gibbs free energy and availability, are carried out to study effects of wettability, roughness, and imposed electric field on the nucleation of a single micro bubble. A phase-change lattice Boltzmann method is developed to study nucleation and growth dynamics of a single bubble in pool boiling. Effects of gravity, contact angle (wettability) and wall superheat on bubble departure diameter, departure frequency and nucleation times are simulated. Experiments using interferometric method are carried out to study the thickness of the microlayer below the bubble and the movement of the triple line.
Dr. Ping Cheng, a member of Chinese Academy of Sciences, is presently a Chair Professor of School of Mechanical Engineering and Honorary Director of Institute of Engineering Thermophysics at Shanghai Jiaotong University. Prior to his present position, he served as Chairman of Mechanical Department at University of Hawaii (1989-1994), and Head of Mechanical Engineering Department at Hong Kong University of Science and Technology (1995-2002).
Prof. Cheng obtained his Ph.D. in Aeronautics and Astronautics from Stanford University. He has been active in research work in porous-media heat transfer, radiative gasdynamics, and microscale heat transfer. He has published over 200 SCI journal papers in these areas that have been cited more than 6000 times according to Science Citation Index (SCI), achieving an H-factor of 41. A Fellow of both ASME and AIAA, Prof. Cheng has received many honors, including 2005 ASME/AIChE Max Jakob Memorial Award (world’s highest honor in the field of heat transfer), 1996 ASME Heat Transfer Memorial Award (for his research in porous media heat transfer), 2003 AIAA Thermophysics Award (for his research in radiative heat transfer and porous media heat transfer), and 2006 ASME Heat Transfer Classic Paper Award (for his groundbreaking paper in . free convection in porous media). He was also a recipient of 2006年上海市科学技术一等奖and 2007 年国家自然科学二等奖 (for his research in microscale heat transfer). He is presently serving as Editors for International J. of Heat & Mass Transfer and International Communication of Heat & Mass Transfer, and is on editorial boards of 14 other international heat transfer and energy journals.
郑平教授简介：
郑平教授是中国科学院院士、国际著名工程热物理学家。现任上海交通大学机械与动力工程学院特聘教授、微流与热控研究中心主任、工程热物理研究所名誉所长。国际传热传质期刊中国区主编、国际传热传质通讯中国区主编和其他12种国际传热期刊编委。
郑教授生于广州，幼年成长于两岸三地。早年赴美留学，毕业于美国俄克拉荷马州立大学机械工程系，先后获麻省理工学院机械工程系硕士学位、斯坦福大学航空航天系博士学位。历任夏威夷大学机械工程系教授(1974－94年)及系主任(1989－94年)、香港科技大学机械工程系教授及第二任系主任（1995-2002）。
郑教授在传热学多个领域有卓越的贡献。在多孔介质传热学及其在地热能源和燃料电池的应用、微尺度传热学及其在芯片冷却的应用、辐射换热学及其在航天的应用等方面发表了200余篇SCI论文，被SCI他引5000余次，H-指数为39。郑教授为美国机械工程师协会会士(ASME Fellow) 、美国航空航天学会会士(AIAA Fellow)。曾获四项传热学国际大奖: 1995年获ASME传热学纪念奖、2003年获AIAA热物理奖、2006年获ASME传热学经典论文奖、2005年获ASME/AIChE“马克杰可纪念奖”,后者为国际传热界个人最高学术奖项。他的研究工作分别获美国机械(ASME)、航空/航天(AIAA)、化工(AIChE)三大工程学会的肯定。在上海交大的研究项目“纳微系统中流体流动与传热传质的基础研究”,获2006年上海市科学技术一等奖、2007年国家自然科学二等奖。由于对上海交大的许多贡献，获2009年“上海交通大学校长奖” 、2011年“上海交通大学杰出校友奖”。 |