用晶格玻尔兹曼方法研究血液在分岔管中的栓塞

血液栓塞形成机理一直是学术界研究的热点.本文将以圆形刚性颗粒在分岔管中的运动模拟血液在微血管中的运动,对血液在分岔管中的栓塞现象作了初步研究.重点研究了当血管发生分岔时,血管中血液流速的变化以及血栓形成的概率.得出结论,压积越大越容易发生栓塞,压差越大越不易发生栓塞.分岔管的入口和分岔处最容易发生栓塞.血液经分岔管后,大管中的压积比小管的高.

Study on the blood embolism in the bifurcation pipe by the lattice Boltzmann method

The mechanism of blood embolism formation always attracts the attention of researchers. Through calculating rigid particle movement in a bifurcated pipe, the blood flow as well as blood embolism in a bifurcated pipe are simulated preliminarily, and the flow speed and the probability to form thrombus are investigated. We can draw a conclusion that the higher the hematocrit is, the easier the blood is to form embolism, meanwhile, the bigger the pressure difference, the harder the blood is to form embolism. We also find that the embolism tends to occur at the entrance of a bifurcated pipe and bifurcation forming place. Beyond the bifurcation place, the hematocrit of the blood in a big tube is larger than that in a small tube.