2008 年 2 巻 1 号 p. 56-67
Numerical simulations are performed using the lattice Boltzmann method for particulate suspension in a plane channel flow at low and moderate Reynolds numbers in order to investigate the blood cell behavior in microvascular flows. The simulation results of three types of particle volume fractions indicate the existence of an important relationship between the Reynolds number and the variance of the particles. When the particle volume fraction is small, it is found that the particles are concentrated between the centerline and the wall, that is, the Segré-Silberberg effect occurs. On the other hand, as the particle volume fraction becomes larger, this effect disappears and the variance of the particles increases. In the case of an inelastic collision, the number of the particles that flow near the wall increases and the variance of the particle distribution decreases in comparison with the case of the elastic collision.
