【摘要】 简要介绍了晶格Boltzmann方法(LBM),它是模拟流体流动以及为复杂物理现象建模的一个新工具,比传统的数值模拟方法有许多独特的优点,特别是在处理复杂边界方面.并应用LBM对动脉分叉的流场在不同雷诺数情况下进行模拟,给出了速度、剪切应力和压力在分叉处的分布,并且分析了分支管内流体分离区的存在.流体在分离区内几乎处于停滞状态,剪切率非常小,容易在此处形成动脉粥硬化.更多还原

【Abstract】 Lattice Boltzmann method (LBM) has recently been proved competitive for studying the domain of fluid flow for various physics system with complex boundary. LBM has been used in hemodynamics to simulate blood flow characteristics. In this study, lattice Boltzmann method (LBM) is used to simulate the conditions at an aortic bifurcation, and some flow information about its velocity, shear stress and pressure is given out. Moreover, the separation zones in the branches revealed with the increase of the Reynolds number are observed where disposition of particular blood continents might occur to form arteriosclerosis.更多还原