水平平板流中氣膠微粒沉積受熱泳和電泳效應影響之研究

A Study of Aerosol-Particle Deposition Rate for Flow Over a Flat Plate by Effects of Thermophoresis and Electrophoresis

隋風銘(F. M. Sui) ； 陳冠宇(G. Y. Chen) ； 蔡瑞益(R. Tsai)

《中原學報》 26卷3期 (1998/08) Pp. 33-39

https://doi.org/10.6358/JCYU.199808.0033

摘要

本文以理論方法探討氣膠微粒流經水平平板時，微粒附著沉積率受熱泳和電泳效應之影響。分析方法是以相似法直接將二維之制御方程式轉換成常微分方程式，再以數值積分法求得微粒濃度場及其附著速率。微粒沉積機制包括布朗擴散、對流、熱泳和電泳效應，另亦同時考慮平板壁之抽吸流和吹氣流效應。同時，所得結果與一維模型化比較分析。

關鍵字

熱泳 ； 電泳 ； 相似法 ； 微粒附著沉積

並列摘要

A theoretical study of aerosol particles deposition onto a flat plate affected by thermophoresis and electrophoresis is reported. Similarity analysis is used to transform the governing equations for mass, momentum and concentration into a system of ordinary differential equations. Through numerical integration of the equation for particle concentration, concentration profiles and deposition rates are obtained. The mechanism for particle deposition includes Brownian diffusion, convection, thermophoresis and electrophoresis. The flow is considered with suction and blowing effects. The analytical results compared with the data of simple-addition method are also examined.

並列關鍵字

thermophoresis ； electrophoresis ； similarity analysis ； particle depo-sition.