用晶格波尔茨曼方法研究动脉内的血液流动特征

The quantative study on the medical science has been attracted much attention.recently. The traditional computation method on the simulation of the blood flow in arteries is quite difficult since the geometry of arteries is very complex and the arteries are distensible. This project focused on developing a noval lattice Boltzmann method and program to simulate the pulstile flows in large distensible arteries. The lattice Boltzmann method has the advantages that the computation velocity is very fast, the capacity needed is relative small, and especially the program is very easy to be parallized. There are two most important comtributions in the present project which make our method applicable in medical science. Incorperating with the feed-back method usually used in comtrol chaos, we develop a new lattice Boltzmann method in which the compressibility error is reduced effectively. We have spended 11 pages in Physical Review E to demonstrate the accuracy and robustness of our boundary condition at complex and distensible liquid/solid boundary, and discuss the.mass conservation at the boundary. The simulation results based on this method are shown to be favorable to the pulstile flows in aortic flow observed experimentally. Based on those work, the person who takes charge of the project, Dr. Haiping FANG was invided to give a talk in Department of Radiation Oncology Massachusetts General Hospital, Harvard Medical School. Recently, we have parallized the program and plan to make the parallized program can be run by Internet grid computing

动脉几何形状很复杂,且在脉动流下管壁会膨胀.传统的数值方法对动脉内的血液流进行研究十分困难.本项目将利用晶格波尔茨曼方法处理边界方便,速度快,内存需求小的特点,发展一套能准确反映弹性边界和液体相互作用的边界处理方案,研究动脉内的血液脉动流流动波态,压力流量关系,阻抗和血管壁上的剪切强度等性质对血管的力学性质的依赖关系..