报告人： 张骏 教授（纽约大学 上海纽约大学）
报告题目：Symmetry Breaking Bifurcations in Fluid-Structure Interaction
报告时间：2021年12月3日（周五）15:00
腾讯会议：ID(228926568)
邀 请 人： 孙博华教授 南非科学院院士、力学技术研究院院长和首席科学家
报告人简介：
张骏教授现任纽约大学、上海纽约大学物理系和数学系（克朗所）两系教授，APS Fellow。始于2013年秋，他在上海纽约大学暨华东师大筹建一个流体物理实验室，继续开展对生物流体和地球流体等方向的研究。这些研究方向涉及动物的飞行和游泳，大陆板块漂移，和微观尺度上的流体输运等问题。他的研究工作曾在“物理评论快报”,“流体力学年鉴”和“自然”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。因为工作和研究的原因，张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。
报告摘要：
The study of fluid-structure interaction involves many disciplines: from fluid dynamics, biological locomotion, mechanical engineering, geophysical phenomena to applied mathematics. In this talk, I will demonstrate a few examples when seemingly symmetric structure-fluid systems bifurcate into asymmetric and unstable states as a result of close interaction. In particular, my first example shows how a “symmetric bird” or a symmetric wing, once flapped up and down in a fluid environment, could “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 heat flux by several folds. These phenomena were first found experimentally, and the results have been investigated by further experiments and numerical studies.
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