锥形管中血液栓塞的晶格玻尔兹曼方法

Research on blood embolism in tapered tube based on lattice Boltzmann method

针对血液循环中血液栓塞问题,基于晶格玻尔兹曼方法建立二维锥形管模型,以不可变形的多个刚性粒子代表红细胞模拟血液在锥形管中的栓塞,考察粒子在流场中的平均速率,对粒子在管道中的运动进行跟踪,统计粒子在管道中的位置,求出粒子在管道不同水平位置的容积率,并记录栓塞瞬间整个管道粒子的分布情况。研究结果表明,压积越大越易发生栓塞,压差越大越不易发生栓塞,锥形管的出口处容易发生栓塞。

Aiming at blood embolism problem in the circulation of the blood,the two-dimensional tapered tube model is es-tablished based on lattice Boltzmann method,and blood embolism is simulated in tapered tube regarding rigid particles as red blood cells.The average speed of particles in flow field,snapshots of particles in the pipeline,positions of particles in the pipeline,and the volume rate of particles in the different horizontal pipeline are showed respectively.Meanwhile,particles distribution is recorded when they are embolism in the whole pipe.The results show that the greater hematocrit,the easier em-bolism,and the greater differential pressure,the more difficult embolism,and the tapered tube outletis easily is embolized.