Abstract

The influence of gravity on the deposition of high-density submicron aerosol particles in fibrous filters from vertical and horizontal (relative to the gravity vector direction) gas flows has been studied at small Reynolds numbers, \(\operatorname{Re} \ll 1.\) Numerical solutions of the Stokes equation and the equation for convective diffusion have been employed to calculate the efficiency of collection of spherical finite-size particles by model filters with two- and three-dimensional flow fields and real filters as depending on the particle size and density and flow velocity direction and taking into account particle deposition on the rear sides of fibers in ascending flows. The calculation results have been confirmed by experimental data on the deposition of submicron spherical silver particles in screens and fibrous filters.

中文翻译：

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重力对重金属亚微米气溶胶过滤的影响

摘要

已经在小雷诺数\(\operatorname{Re} \ll 1. ) 研究了重力对来自垂直和水平（相对于重力矢量方向）气流的高密度亚微米气溶胶颗粒在纤维过滤器中沉积的影响。 \)斯托克斯方程和对流扩散方程的数值解已被用于计算具有二维和三维流场的模型过滤器和实际过滤器根据颗粒尺寸和密度收集球形有限尺寸颗粒的效率和流速方向，并考虑上升流中纤维后侧的颗粒沉积。计算结果已通过有关亚微米球形银颗粒在筛网和纤维过滤器中沉积的实验数据得到证实。