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[求是数学前沿论坛]Nonlinear Models and Simulations of Self-organization in Active Matter

编辑:xyx 时间:2018年06月12日 访问次数:765

浙江大学数学科学学院九十周年院庆系列活动之二十二


报告人:  David Saintillan教授(加州大学圣地亚哥分校)

题目:Nonlinear Models and Simulations of Self-organization in Active Matter

时间: 2018年6月15日(周五)下午14:45开始

地点:浙江大学玉泉校区逸夫工商楼4楼报告厅


摘要:

The spontaneous emergence of large-scale coherent motions and patterns is a striking feature of many active soft matter systems and often results from long-ranged hydrodynamic interactions driven by internal active forces. In the first part of my talk, I will focus on bacterial suspensions, where hydrodynamic instabilities are known to arise due to the force dipoles exerted by motile microorganisms which couple to their orientations through the flows they generate. Using both continuum modeling and numerical simulations, I will analyze the interplay between these instabilities and geometrical confinement, where an apparent transition to superfluidity can be harnessed to drive unidirectional streaming flows. The second part of the talk will address the seemingly very different – yet perhaps related – case of chromosomal dynamics inside the nucleus during cell interphase, where experiments recently revealed coherent motion on large length and time scales. A model of chromatin dynamics as a confined polymer chain acted upon by molecular enzymes exerting force dipoles will be discussed, where hydrodynamic interactions emerge once again as a potential mechanism for coherent motions and large-scale self-organization.


主讲人简介:

David Saintillan教授于2001年在法国综合理工学校获得工程学学士学位,2003年至2006年在斯坦福大学获得机械工程硕士学位和博士学位。随后,他在2006年至2008年间在纽约大学的Courant数学科学研究院担任初级研究科学家,并在2008年至2013年间担任伊利诺伊大学的机械科学与工程助理教授。2013年加入加利福尼亚大学圣地亚哥分校,担任机械和航空航天工程教授。David Saintillan教授主要从事生物流体力学、微流体动力学系统、微观尺度输运以及电动力学的研究,在Physical Review Letters, Scientific Reports, Nature Communications, Langmuir等著名杂志发表多篇论文。曾获得过美国国家科学基金奖及阿诺尔多.贝克曼研究奖等奖项。

 

主办单位: 浙江大学数学科学学院 


联系人:张挺(zhangting79@zju.edu.cn)


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