The inertial focusing of particles in channel flow of a Newtonian fluid is studied using the lattice Boltzmann method. The effects of Reynolds number (Re) and blockage ratio (k) on the stability condition of self-organizing staggered particle trains are explored. The results show that, for staggered particle pairs, the particles will move close to each other with a damped oscillatory trajectory and form a steady horizontal spacing eventually. For single-line particle pairs, the inter-particle spacing increases continuously to a larger value for further downstream. Two lines of 12 particles will self-organize the staggered particle trains. The formation of stable staggered particle trains is dependent on Re and k. Particles with low k in the staggered particle trains are more likely to be unstable or fluctuate within a certain range when Re is larger than a critical value. As k increases, the critical values of Re corresponding to the inter-particle spacing with a stable value or a certain range of fluctuation are also increased. The mean particle spacing decreases with increasing k and decreasing Re, and the blockage ratio k has a greater effect on the particle spacing than Reynolds number Re.

利用格子玻尔兹曼方法研究了牛顿流体通道流中颗粒的惯性聚焦。探索了雷诺数（Re）和阻滞比（k）对自组织交错粒子列的稳定性条件的影响。结果表明，对于交错的粒子对，粒子将以阻尼的振荡轨迹相互靠近并最终形成稳定的水平间距。对于单行粒子对，粒子间间距连续增加到更大的值，以进一步向下游移动。两行12个粒子将自动组织交错的粒子列。稳定的交错粒子列的形成取决于Re和k。低k的粒子当Re大于临界值时，交错粒子列中的θ可能更不稳定或在一定范围内波动。随着k的增加，对应于具有稳定值或一定波动范围的粒子间间隔的Re的临界值也增加。平均粒子间距随着k的增加和Re的减小而减小，并且阻塞比k比雷诺数Re对粒子间距的影响更大。