Particle deposition in ventilation duct with convex or concave wall cavity

作     者：WANG Fei-fei ZHANG En-shi XU Xin-hua WANG Jin-bo MI Jian-chun 王飞飞;张恩实;徐新华;王劲柏;米建春

作者机构：School of Environmental Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China College of EngineeringPeking UniversityBeijing 100871China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2018年第25卷第11期

页      面：2601-2614页

核心收录：

学科分类：07[理学] 08[工学] 070602[理学-大气物理学与大气环境] 081404[工学-供热、供燃气、通风及空调工程] 0706[理学-大气科学] 0814[工学-土木工程] 

基　　金：Project (51506069) supported by the National Natural Science Foundation of China Project (2016YFB0600605) supported by the National Key Research and Development Program of China Projects (HUST2016YXMS286,HUST2015061) supported by the Fundamental Research Funds for the Central Universities,China 

主　　题：numerical simulation ventilation duct particle deposition deposition velocity 

摘      要：A numerical study is carried out on particle deposition in ducts with either convex or concave wall *** show that,if compared with smooth duct,particle deposition velocitiesVd^+increase greatly in ducts with wall *** specifically,forτ+1,Vd^+grows relatively *** of particle deposition with wall cavities is caused by the following mechanisms,i.e.,interception by the wall cavities,expanded deposition area,and the enhanced flow *** general,addition of wall cavities is contributive for particle deposition,so it provides an efficient approach to remove particles,especially with small size,e.g.,***,the convex wall cavity leads to a larger increment ofVd^+than the concave wall ***,taking pressure loss into account,thoughVd^+is relatively lower,duct with the concave wall cavity is more efficient than that with the convex wall cavity.