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首页> 外文期刊>Numerical Heat Transfer, Part B. Fundamentals: An International Journal of Computation and Methodology >Particle transport in microchannels
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Particle transport in microchannels

机译：微通道中的粒子传输

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摘要

Particle transport in microchannel is presented. This article focuses on situations in which the sizes of the particles are comparable to the sizes of the channels. These solid bodies are sufficiently large that momentum is exchanged between the bodies and the flowing fluid. As a result, the solid bodies affect the fluid flow significantly, and vice versa, resulting in a transient process in which the motions of the solid bodies and the flow field are strongly coupled. The flow field and the particulate flow must then be solved simultaneously. The solid bodies are modeled as a fluid constraint to move with rigid body motion. The solid-fluid interface is described using a distance function. For demonstration purposes, the finite-volume method is used to solve the resulting set of governing equations. The present approach is validated against (1) flow around stationary, (2) flow around forced rotating, (3) flow around freely rotating cylinders, and (4) sedimentation of a circular cylinder under gravity. Finally, the motion of particles carried by an incompressible fluid in a microchannel system is studied.
机译：提出了微通道中的颗粒运输。本文重点介绍粒子大小与通道大小相当的情况。这些固体足够大，以使动量与流动的流体之间交换动量。结果，固体显着影响流体流动，反之亦然，导致瞬态过程，其中固体的运动与流场牢固地耦合。然后必须同时解决流场和颗粒流。实体被建模为流体约束以随刚体运动而移动。使用距离函数描述固体-流体界面。出于演示目的，有限体积方法用于求解控制方程组的结果。针对以下情况验证了本方法：（1）围绕静止的流动，（2）围绕强制旋转的流动，（3）围绕自由旋转的圆柱体的流动以及（4）重力作用下圆柱的沉降。最后，研究了微通道系统中不可压缩流体携带的颗粒运动。

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