演讲人Speaker： 李龙飞

题目Title: A stable partitioned FSI algorithm for incompressible flow and deforming beams

时间Date：2018年12月20日Time：14：30 – 15：30

地点Venue：H栋308室

内容摘要Abstract：

A new partitioned algorithm is described for solving fluid-structure interaction (FSI) problems coupling incompressible flows with elastic structures undergoing finite deformations. The new algorithm, referred to as the Added-Mass Partitioned (AMP) scheme, overcomes the added-mass instability that has for decades plagued partitioned FSI simulations of incompressible flows coupled to light structures. Within a Finite-Difference framework, the AMP scheme achieves fully second-order accuracy and remains stable, without sub-time-step iterations, even for very light structures when added-mass effects are strong. The stability and accuracy of the AMP scheme is validated through mode analysis and numerical experiments. Aiming to extend the AMP scheme to a Finite-Element framework, we also develop an accurate and efficient Finite-Element Method for solving the Incompressible Navier-Stokes Equations with high-order accuracy up-to the boundary.

个人简介(About the speaker):

李龙飞，现任美国路易斯安那大学数学系助理教授, 于2005年获得四川大学学士学位，而后分别于2011年和2014年获得美国特拉华大学硕士及博士学位，2014年至2017年担任美国伦斯勒理工学院 Margaret A. Darrin PostdoctalFellow，然后在美国路易斯安那大学数学系任教至今。主要研究兴趣为偏微分方程数值解、高性能计算方法和数值分析。