Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/120524
Title: HUMAN CONVECTIVE BOUNDARY LAYER AND ITS IMPACT ON PERSONAL EXPOSURE
Authors: LICINA DUSAN
Keywords: Human convective boundary layer, Personal exposure, Airflow characteristics, Thermal manikin, Quiescent environment, Ventilation flow
Issue Date: 9-Jan-2015
Citation: LICINA DUSAN (2015-01-09). HUMAN CONVECTIVE BOUNDARY LAYER AND ITS IMPACT ON PERSONAL EXPOSURE. ScholarBank@NUS Repository.
Abstract: The two objectives are: (i) to examine the extent to which the room air temperature, ventilation flow, body posture, clothing insulation/design, table positioning and chair design affect the airflow characteristics (velocity, turbulence and temperature) around the human body; and (ii) to examine the pollution distribution within the human convective boundary layer (CBL) and personal exposure to gaseous and particulate pollutants as a function of the factors that influence the human CBL, and of different pollution source locations. Most of the parameters studied exhibited a strong effect on both airflow characteristics and personal exposure. For accurate predictions of personal exposure, the CBL needs to be considered, as it can transport the pollution around the human body. Some airflow directions exhibit a non-linear dependence between the supply airflow rate and personal exposure. Without a better understanding of the airflow patterns in a room the ventilation rate may therefore be increased in vain.
URI: http://scholarbank.nus.edu.sg/handle/10635/120524
Appears in Collections:Ph.D Theses (Open)

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Video 3.1 Seated Manikin at 20 degrees C.avi3.33 MBAVI

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Video 3.2 Seated Manikin at 26 degrees C.avi3.13 MBAVI

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Video 3.3 Standing Manikin.avi1.87 MBAVI

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Video 4.1 Human thermal plume in a calm indoor environment.avi2.55 MBAVI

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Video 4.2 Interaction between the CBL and opposing flow at low velocity.avi2.48 MBAVI

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Video 4.3 Interaction between the CBL and opposing flow at medium velocity.avi1.99 MBAVI

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Video 4.4 Interaction between the CBL and opposing flow at high velocity.avi1.48 MBAVI

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Video 4.5 Human CBL in a calm indoor environment.avi2.18 MBAVI

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Video 4.6 Interaction between the CBL and assisting flow at low velocity.avi2.17 MBAVI

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Video 4.7 Interaction between the CBL and assisting flow at medium velocity.avi2.17 MBAVI

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Video 4.8 Interaction between the CBL and assisting flow at high velocity.avi2.04 MBAVI

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Video 5.1 Transport of the pollution released from the chest by means of the CBL.avi1.61 MBAVI

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Video 5.2 Transport of the pollution released from knees by means of the CBL.avi2.04 MBAVI

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Video 5.3 Transport of the pollution released from the groins by means of the CBL.avi2.43 MBAVI

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Video 6.1 Cough released 2m from the front of the manikin.avi1.64 MBAVI

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Video 6.2 Cough released 3m from the front of the manikin.avi1.62 MBAVI

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LicinaD.PDF.pdf7.45 MBAdobe PDF

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