学术交流
受特殊冶金与过程工程研究所张廷安教授与赵秋月副教授的邀请，美国普渡大学陈军教授于2017年3月7日-13日来我校交流，并将作系列报告与讲座。欢迎感兴趣的老师与同学参加!
第一次讲座时间:2017年3月9日 上午9:30分
讲 座 题 目:粘性流体力学的基础与应用
陈军博士现就职于普度大学机械工程学院。他于2005年获Johns Hopkins University (约翰-霍普金斯大学)机械工程博士学位。2005年至2008年在Los Alamos National Laboratory (洛斯-阿拉姆斯国家实验室)从事博士后研究。2008年开始在普度大学任教，其研究方向涉及先进测量技术开发、非定常流体力学及湍流模型实验研究、环境流体力学、低马赫数气动噪声、可再生能源、心血管血液动力学等。在国际学术期刊上发表学术论文30余篇，曾获颁期刊Measurement Science and Technology的2005优秀流体力学论文奖（OUTSTANDING FLUID MECHANICS PAPER AWARD）和美国机械工程师协会2014 ROBERT T. KNAPP AWARD。
Abstract
Our recent effort on developing digital holography system as a flow diagnostics tool will be introduced in this talk.
Quantitative application of digital in-line holography (DIH) to characterize multiphase drop fragmentation is introduced. DIH is applied to record sequential holograms of the breakup of an ethanol droplet in an aerodynamic flow field. Various stages of the breakup process are recorded, including deformation, bag growth, bag breakup and rim breakup. A recently proposed hybrid method significantly improves the accuracy of particle detection. The new method is applied to extract the three-dimensional (3D) location and size of secondary droplets as well as the 3D morphology of the rim. Particle matching between sequential frames is used to determine the velocity. Coincidence with the results obtained from phase Doppler anemometry (PDA) measurement demonstrates the accuracy of measurement by DIH and the hybrid method.
The recent applications of digital holography on characterizing burning particles are also introduced. Digital holography is an excellent non-invasive imaging technique for visualize the cellular dynamics of organogenesis in vivo.
