理学论坛第一百二十六次学术活动通知(王一帆报告)
发布时间: 2017-12-19   浏览次数: 112

报告题目:模拟带有支架的冠状动脉与血液的流固耦合问题
报告人:王一帆 博士
报告人单位:美国休斯敦大学数学系
时间:2017年12月21日(周四)下午15:30-16:30
地点:教2-314(理学院会议室)
主办单位:理学院、科学计算研究团队、科研院
报告内容:This work is motivated by fluid-structure interaction between a coronary artery treated with a stent, pulsatile blood flow, and heart contractions. The fluid is modeled by the incompressible, viscous Navier-Stokes equations, and the vascular walls are modeled as multi-layered composite elastic structures approximating the multi-layered structure of arterial walls. To include the effects of heart contractions, external force was applied to model the change in artery curvature. The fluid and composite structure are fully coupled via kinematic and dynamic coupling conditions, which describe continuity of velocity and balance of contact forces. The contraction of the heart is modeled by adding a periodic external force to the structure's outer surfaces, and the presence of the stent is modeled by changing the density and elasticity of the structure coefficients in the inner-most layer, corresponding to the intima, where the stent is located. A loosely coupled partitioned scheme combined with an ALE approach is used to solve this nonlinear FSI problem. Four types of commercially available coronary stents are considered, and their performance compared and quantified. Based on the simulations, two out of four stents are considered to be more suitable for coronary angioplasty with stenting in curved, or tortuous arteries. Our results correlate well with clinical results. This is a joint work with Sunčica Čanić, Martina Bukač and Josip Tambača.
报告人简介:王一帆博士在Louisiana Tech University取得博士学位,随后在美国休斯敦大学数学系从事博士后研究工作,研究方向包括流体和流体结构干涉的数值方法(Discontinues Galerkin Method, Smoothed Particle Hydrodynamics, Spectral / Finite Element method, Compact/Finite Difference method, Finite Volume method),并行计算(CUDA C/C++, PETSC, MPI, OpenMP)等。