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Choi, J.-I.; Edwards, J. R.
Indoor air, February 2012, Letnik: 22, Številka: 1Journal Article
A large‐eddy simulation is used to investigate contaminant transport owing 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 the details of contaminant transport owing 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. Practical Implications The effect of human activity on contaminant transport may be important in design and operation of clean or isolation rooms in chemical or pharmaceutical industries and intensive care units for airborne infectious disease control in a hospital. The present simulations demonstrate details of contaminant transport in such indoor environments during human motion events and show that simulation‐based sensitivity analysis can be utilized for the diagnosis of contaminant infiltration and for better environmental protection.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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