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Research Article

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

Lipeng Lv1, Yuhang Wu1, Changsheng Cao1, Lingjie Zeng2, Jun Gao1( ), Wuhao Xie1, Jing Zhang1
Institute of HVAC Engineering, School of Mechanical Engineering, Tongji University, Shanghai 200092, China
College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
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Abstract

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.

Keywords

dynamic simulationhuman walkingoverset mesh methodflow characteristicsresidential kitchen

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Building Simulation
Volume 15 Issue 6,
June 2022
Pages 1051-1066
DOI: 10.1007/s12273-021-0844-1
Cite this article:
Lv L, Wu Y, Cao C, et al. Impact of different human walking patterns on flow and contaminant dispersion in residential kitchens: Dynamic simulation study. Building Simulation, 2022, 15(6): 1051-1066. https://doi.org/10.1007/s12273-021-0844-1

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Received: 15 June 2021
Revised: 12 August 2021
Accepted: 05 September 2021
Published: 05 October 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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