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Human-Induced Contaminant Transports in Indoor Environments

실내환경내에 보행자의 출입과정에서 유발되는 오염물질의 이동에 대한 수치 연구를 기반으로 생화학 무기 공격 혹은 독성물질의 누출, 병원 내 전염 통제등을 위한 연구를 하고자 한다.

A large eddy simulation is used to investigate contaminant transport due to complex human and door motions and vent-system activity in room compartments where a contaminated and clean room are connected by a vestibule. Human and door motions are simulated with an immersed boundary procedure. We demonstrate details of contaminant transport due to human- and door-motion induced wake development during a short-duration event involving the movement of a person (or persons) from a contaminated room, through a vestibule, into a clean room. Parametric studies that capture the effects of human walking pattern, door operation, over-pressure level, and vestibule size are systematically conducted. A faster walking speed results in less mass transport from the contaminated room into the clean room. The net effect of increasing the volume of the vestibule is to reduce the contaminant transport. The results show that swinging-door motion is the dominant transport mechanism and that human-induced wake motion enhances compartment-to-compartment transport.

Choi & Edwards (2008) Indoor Air ; Choi & Edwards (2011) Indoor Air

Snapshots of vorticity iso-surfaces colored by SF6 mass concentration for person walking event; Contour plots of concentration in (b) vertical plane view; at (c) z=1.0 and (d) z=1.5m in horizontal plane view.

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