数学科学系

Department of Mathematical Sciences

High Resolution Numerical Simulation for Flow Past a Sphere

报告题目: High Resolution Numerical Simulation for Flow Past a Sphere.

 

报告人:王伟成教授 (台湾国立清华大学数学系)

 

时间:201471日(星期二)上午1030-1130

 

地点:理科楼数学系A404

 

摘要:We present an essentially compact 4th order scheme for axisymmetric flows past a spherical obstacle. The main ingredients of the scheme include (1) the generalized vorticity formulation that validates the divergence free constraint automatically and essentially decouples the equations, (2) proper formulation and implementation of the pole condition that guarantees the stability of the scheme under time evolution, and (3) a novel change of variable that enables a fast Poisson solver for the stream function via FFT and realization of the exact far field boundary condition. High Reynolds number simulations are presented, demonstrating that the scheme is capable of resolving fine details of the complex wake structures.

 

报告人简介:王伟成教授,1997年在美国纽约大学柯朗研究所获得博士学位,美国伯克利大学数学科学研究院博士后。现为台湾国立清华大学数学系教授。研究领域为微分方程、流体力学和科学计算。

 

联系人:黄忠亿