Impact of different human walking patterns on flow and contaminant dispersion in residential kitchens:Dynamic simulation study  

作　　者：Lipeng Lv Yuhang Wu Changsheng Cao Lingjie Zeng Jun Gao Wuhao Xie Jing Zhang 

机构地区：[1]Institute of HVAC Engineering,School of Mechanical Engineering,Tongji University,Shanghai,200092,China [2]College of Environmental Science and Engineering,Tongji University,Shanghai,200092,China

出　　处：《Building Simulation》2022年第6期1051-1066,共16页建筑模拟（英文）

基　　金：supported by the National Natural Science Foundation of China(No.50908163).

摘　　要：The effects of different human walking patterns on contaminant dispersion in residential kitchens were investigated through computational fluid dynamics simulation with the dynamic mesh method.A tracer gas experiment was performed to verify the feasibility and accuracy of the simulation method.Flow characteristics induced by human walking were minutely described,and the transient capture efficiency of the range hood was adopted to assess the impact of human walking quantitatively.Human walking parallel to a counter,human walking parallel to a counter manned by another human,and human walking toward a counter were studied.Results showed that the mutual effect of the wake and thermal plume caused contaminant dispersion and decreased the performance of the range hood as the human subject walked beside the counter.Even a standing person operated ahead the counter,the wake would affect the thermal plume in a certain extent.The decrement of capture efficiency approached 0.5 in the most unfavorable situation.Moreover,the coaction of the positive/negative pressure zone and impinging air jet drew the thermal plume to the human body.The fluctuation of capture efficiency in this condition was moderate relative to that for the human walking pattern beside the counter.This research could provide a comprehensive overview of different human walking patterns and their impact on residential kitchens and thereby facilitate the maintenance of kitchen air quality.

关 键 词：human walking overset mesh method dynamic simulation flow characteristics residential kitchen 

分 类 号：TU241[建筑科学—建筑设计及理论]