行健讲坛学术讲座
第407期
时间:2019年8月30日(周五)上午09:30
地点:校本部东区12号楼B525室
讲座:Dynamics of patches of wind ripples: what happens after initial focussing?
演讲者: 中国科学院力学研究所 王展 研究员
演讲者简介:
王展,中国科学院力学研究所研究员、博士生导师。本科与硕士毕业于南京大学,2012年获威斯康星大学麦迪逊分校应用数学博士学位。毕业后曾先后担任伦敦大学学院研究助理(2012-2014)和巴斯大学讲师(2014-2016)。研究领域为应用数学与流体力学,主要从事非线性波、水弹性力学、电磁流体力学、流动稳定性等方向的理论与应用基础研究。
讲座摘要:
Water waves can span scales of hundreds of kilometres to a few millimetres with fascinating and complex behaviours. At small scales, when gravity and surface tension are equally important, water waves exhibit a large variety of phenomena, one of which is the combination of geometric and nonlinear self-interaction focussing of localised disturbances. This phenomenon is very much like strong laser pulses propagating through a Kerr medium. We describe the reasons for this similarity and how the evolutions in the two cases differ past the collapse time.
邀请人:上海大学通信与信息工程学院 牟成博 教授
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