Surface Rejuvenation Model for Analysis of Turbulent Particle Transports

Surface Rejuvenation Model分析紊流微粒傳遞

邱青煌(Ching-Huang Chiu) ； 劉建宏(Jian-Hong Liou) ； 邱明志(Ming-Chiou Chiou)

《中國機械工程學刊》 30卷3期 (2009/06) Pp. 239-248

https://doi.org/10.29979/JCSME.200906.0008

摘要

延展Surface Rejuvenation model探討thermophoresis與turbophoresis對懸浮微粒在紊流流動場之傳遞現象的影響。藉由所獲得之解析解估算微粒在平均子層成長週期間的沉澱速度，並以曲線描繪沉澱速度與Relaxation time 的相對關係，其結果與實驗量測之數據相當吻合。

關鍵字

surface rejuvenation ； thermophoresis ； turbophoresis

並列摘要

A useful framework for estimating the particle concentration and convective velocity is established by adaptation of surface rejuvenation model to the particle continuity and momentum equations of a nonisothermal turbulent flow with fully developed boundary. The proposed relationship for deposition rate of particles obtained on the basis of this model is expressed in the form of analytical equation, with inclusion of the effects of Brownian and turbulent diffusion, turbophoresis, and thermophoresis. The calculations of this equation has been coupled with appropriate estimates of these modeling parameters, and its solution has been found to be in good agreement with experimental values of particle deposition velocity for entire range of particle size. Surface Rejuvenation Model