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Study of micro particles deposition in ribbed channel: A numerical investigation in turbulent airflow

机译：肋状通道中微粒沉积的研究：湍流流动的数值研究

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摘要

The air is modeled as incompressible flow in a ribbed channel. The existence of ribs on channel surface causes the turbulence in flow, therefore we must solve the turbulence equations. There are previous experimentally investigations on turbulence flow in ribbed channels. In this article, the results of numerical simulation are compared with experimental results and the effectiveness of k-ε model in solving the problem of micro-particle deposition with Lagrangian model is studied because of complexities of turbulent flow, the problem is modeled both 2- and 3-dimensionally. After solving the fluid domain, the particle equations of motion are solved separately and finally the particle deposition on channel surface is calculated. Considering the physic and complications of turbulent flows, the results of 2-D simulation are different with experimental results, despite of 3-D results, which are in complete accordance with experimental results.
机译：空气被建模为带肋通道中的不可压缩流。通道表面肋的存在会引起湍流，因此必须求解湍流方程。以前对肋状通道中的湍流进行了实验研究。在本文中，将数值模拟的结果与实验结果进行了比较，并且由于湍流的复杂性，研究了k-ε模型在用拉格朗日模型解决微粒沉积问题方面的有效性，对问题进行了建模2-和3维。求解流体域后，分别求解运动的粒子方程，最后计算粒子在通道表面上的沉积。考虑到湍流的物理和复杂性，尽管有3-D结果，但二维模拟的结果与实验结果不同，这与实验结果完全一致。

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