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首页> 外文期刊>Journal of Micromechanics and Microengineering >A theoretical analysis of the resolution due to diffusion and size dispersion of particles in deterministic lateral displacement devices
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A theoretical analysis of the resolution due to diffusion and size dispersion of particles in deterministic lateral displacement devices

机译:确定性侧向位移装置中由于颗粒扩散和尺寸分散所引起的分辨率的理论分析

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摘要

We present a model including diffusion and particle-size dispersion for the separation of particles in deterministic lateral displacement devices also known as bumper arrays. We determine the upper critical diameter for diffusion-dominated motion and the lower critical diameter for pure convection-induced displacement. Application of our model to data suggests that the systematic deviation, observed for small particles in several experiments, from the critical diameter for separation given by simple laminar flow considerations may be explained by diffusion and size dispersion.
机译:我们提出了一个模型,该模型包括用于确定性横向位移设备(也称为保险杠阵列)中的颗粒分离的扩散和粒度分散。我们确定了扩散主导运动的上临界直径和纯对流引起的位移的下临界直径。将我们的模型应用于数据表明,在几个实验中观察到的小颗粒相对于由简单层流考虑而给出的分离临界直径的系统偏差,可以用扩散和尺寸分散来解释。

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