中文

海洋工程系列学术报告

发布日期:2018-07-06

报告题目

Symmetry Breaking Bifurcations arising from Fluid-Structure Interaction

时间

7月6日(周五)下午2:00

地点

木兰船建大楼 B301

报告人

张骏教授 (纽约大学)

 

报告内容简介: 

 The study of fluid-structure interaction involves many disciplines: from biological locomotion, mechanical engineering, geophysical phenomena to applied mathematics. In this talk, I will demonstrate a few examples when seemingly symmetric systems bifurcate into asymmetric and unstable states as a result of intimate fluid-structure interaction. In particular, my first example shows how a "symmetric bird" or a symmetric wing, once flapped up and down in a fluid environment, will "take off" and sustain a unidirectional flight. The second example shows that a model continent, when interacting with a convective mantle, results in oscillatory or trapped states. Lastly, I will discuss a recent discovery as a divided or partitioned thermal convection system finds a stable solution that resembles a "fluid lattice" and surprisingly boosts the thermal flux by several folds. These phenomena were first found experimentally, and the results have been investigated by further experiments and numerical studies.  

报告人简介:

  张骏教授现任美国纽约大学物理系和数学系(克朗所) 两系教授, APS Fellow,库朗数学研究所应用数学实验室联合主任。研究方向为流体物理及复杂系统,包括生物机械学/生物运动(生物的游泳、飞行与行走)、地质流体(热对流、大陆动力学、腐蚀作用)、固体摩擦、城市热岛效应、不同尺度下的自组织现象等。他的研究工作曾在“物理评论快报(PRL)”, “流体力学年鉴(Annu. Rev. Fluid Mech.)” 和 “自然(Nature)” 等杂志发表。张骏的工作也曾经被包括美国ABC电视台,“纽约客”,英国的“经济学人”, BBC电台,New Scientists,和Nature等杂志媒体广泛报道。因为工作研究的原因,张骏教授的足迹遍及很多国家和地区,包括南极和北极的一些地方。他也曾经三次专程观测日食, 包括去年夏天横贯美洲大陆的日全食,在那次观测中,研究的目的主要是研判日全食会不会引起传说中的阵风。 

 

邀请人:田新亮        Email: tianxinliang@sjtu.edu.cn