时 间：2018年12月24日上午10：00-11：00
地 点：航空楼A706
报告题目：Multiscale Mechanics and Modeling of Fluid Materials
报告人：边鑫博士，苏黎世联邦理工学院(ETH)
邀请人：潘书诚 副教授
摘要：
Multiscale mechanics is ubiquitous in fluid materials such as paint, starch and blood. To understand, explore and exploit such mechanism, we have adopted a computational approach with an emphasis on high performance computing, and it is complemented by semi-analytical approaches. In particular, we model soft materials such as particulate and colloidal multiphase suspension flows at individual scales, and study the dynamics and rheology of these non-Newtonian fluids. For this research line, we adopt a top-down/continuum perspective and thermal fluctuations differentiate whether it is a macroscopic or mesoscopic description. The corresponding numerical methods adopted are smoothed particle hydrodynamics (SPH) and smoothed dissipative particle dynamics (SDPD). We also consider a bottom-up perspective by systematically coarse-graining (CG) systems with atomic details into models with much reduced degrees of freedom. One of the rigorous CG strategies we employ is the Mori-Zwanzig (MZ) projection formalism from non-equilibrium statistical mechanics. The corresponding numerical methods are molecular dynamics (MD), CG-MD, and dissipative particle dynamics (DPD). Furthermore, we also develop and analyze coupling strategies to simulate two or multiple scales concurrently on the fly, such as hybrid simulations of particle dynamics and continuum mechanics. To facilitate the method developments and popularize further their applications, we have released two high performance software packages. Along the different research lines, we show various applications such as blood cells related to the efforts of modeling and algorithm developments.
个人简历：
边鑫博士有着计算机科学、计算数学和高性能计算背景，获得同济大学学士，慕尼黑工业大学硕士、博士。自2013年开始他分别在德国慕尼黑工业大学空气动力和流体力学所、美国布朗大学应用数学所、以及瑞士苏黎世联邦理工学院机械系进行博士后研究，与Nikolaus Adams教授、George Karniadakis教授、Petros Koumoutsakos教授进行合作。他博士和博士后期间分别短期访问过美国特拉华大学化工系和普林斯顿大学数学系，并建立合作。目前在苏黎世联邦理工学院计算科学和工程实验室进行微尺度复杂流动大规模计算的研究。他的科研工作涉及计算数学、高性能计算、流体力学、软物质物理、生物物理、化工工程处理等领域。其研究多学科性可见证于20多篇国际权威期刊，如J. Comput. Phys.，Phys. Rev. E，J. Chem. Phys.，Phys. Fluid，Biophysics，Soft matter，J. Non-Newtonian Fluid. Mech.等，并参与书写3本国际专著的章节。他还带头主写了关于软物质中布朗运动的综述评审，发在Soft matter上。他被国际会议和研究所邀请报告10余次。他的科研工作有两篇文章被选为当期的期刊封面，并被新闻报道（如https://news.brown.edu/articles/2017/07/sicklecell）。另外他的Google Scholar引用数从2012年开始记大概为400次，并以每年100余次数增加，h指数11。
