Lattice Boltzmann Simulation of One Particle Migrating in a Pulsating Flow in Microvessel

A lattice Boltzmann model of two dimensions is used to simulate the movement of a single rigid particle suspended in a pulsating flow in micro vessel The particle is as big as a red blood cell, and the micro vessel is four times as wide as the diameter of the particle. It is found that Segrd-Silberb...

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Bibliographic Details
Published inCommunications in theoretical physics Vol. 56; no. 10; pp. 756 - 760
Main Author 邱冰 谭惠丽 李华兵
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.10.2011
Subjects
Computational fluid dynamics
Computer simulation
Dynamic tests
Fluid flow
Heart rate
Lattices
Pulsation
Reynolds number
平衡位置
微血管
悬浮颗粒
格子Boltzmann模型
模拟
粒子迁移
脉动流
运动轨迹
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ISSN0253-6102
DOI10.1088/0253-6102/56/4/27

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Summary:A lattice Boltzmann model of two dimensions is used to simulate the movement of a single rigid particle suspended in a pulsating flow in micro vessel The particle is as big as a red blood cell, and the micro vessel is four times as wide as the diameter of the particle. It is found that Segrd-Silberberg effect will not respond to the pulsation of the flow when the Reynolds number is relatively high. However, when the Reynolds number is low enough, Segrd-Silberberg effect disappears. In the steady flow, different initial position leads to different equilibrium positions. In a pulsating flow, different frequencies of pulsation also cause different equilibrium positions. Particularly, when the frequency of pulsation is closed to the human heart rate, Segrd-Silberberg effect presents again. The evolutions of velocity, rotation, and trajectory of the particle are investigated to find the dynamics of such abnormal phenomenon.
Bibliography:Segre Silberberg effect, lattice Boltzmann method, red blood cell, pulsating flow
11-2592/O3
A lattice Boltzmann model of two dimensions is used to simulate the movement of a single rigid particle suspended in a pulsating flow in micro vessel The particle is as big as a red blood cell, and the micro vessel is four times as wide as the diameter of the particle. It is found that Segrd-Silberberg effect will not respond to the pulsation of the flow when the Reynolds number is relatively high. However, when the Reynolds number is low enough, Segrd-Silberberg effect disappears. In the steady flow, different initial position leads to different equilibrium positions. In a pulsating flow, different frequencies of pulsation also cause different equilibrium positions. Particularly, when the frequency of pulsation is closed to the human heart rate, Segrd-Silberberg effect presents again. The evolutions of velocity, rotation, and trajectory of the particle are investigated to find the dynamics of such abnormal phenomenon.
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ISSN:0253-6102
DOI:10.1088/0253-6102/56/4/27