Extent of the reverse flow wake region produced by a body in a uniform flow field

Irma Welling, Ilpo Kulmala, Ing-Marie Andersson, Gunnar Rosen, Timo Mielo, Keijo Marttinen, Arto Säämänen, Raimo Niemelä

    Research output: Contribution to journalArticleScientificpeer-review

    3 Citations (Scopus)

    Abstract

    A reverse flow is created in front of an object placed in a uniform air stream that originates from behind the object. Gaseous contaminants may then be transported into the breathing zone of a worker from sources located within the reverse flow region. This should be taken into consideration when local ventilation systems are designed. The objective of this study was to characterize the reverse flow zone created in front of a worker in a uniform flow of air,using both experimental data and numerical simulation. Experiments were carried out by moving a point contaminant source on a table placed in front of the worker, and by measuring the contaminant concentration at nose level in front of the worker. The experimentally estimated length of the reverse flow region was smallest (0.5-1.0 m) with a nominal freestream velocity of 0.1 m/s, and similar (1.1-1.4 m) with nominal freestream velocities of 0.3 and 0.5 m/s.
    Original languageEnglish
    Pages (from-to)900-904
    Number of pages5
    JournalApplied Occupational and Environmental Hygiene
    Volume16
    Issue number9
    DOIs
    Publication statusPublished - 2001
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Air
    Nose
    Ventilation
    Respiration

    Cite this

    Welling, Irma ; Kulmala, Ilpo ; Andersson, Ing-Marie ; Rosen, Gunnar ; Mielo, Timo ; Marttinen, Keijo ; Säämänen, Arto ; Niemelä, Raimo. / Extent of the reverse flow wake region produced by a body in a uniform flow field. In: Applied Occupational and Environmental Hygiene. 2001 ; Vol. 16, No. 9. pp. 900-904.
    @article{c4e45264a76240638c78980060df446c,
    title = "Extent of the reverse flow wake region produced by a body in a uniform flow field",
    abstract = "A reverse flow is created in front of an object placed in a uniform air stream that originates from behind the object. Gaseous contaminants may then be transported into the breathing zone of a worker from sources located within the reverse flow region. This should be taken into consideration when local ventilation systems are designed. The objective of this study was to characterize the reverse flow zone created in front of a worker in a uniform flow of air,using both experimental data and numerical simulation. Experiments were carried out by moving a point contaminant source on a table placed in front of the worker, and by measuring the contaminant concentration at nose level in front of the worker. The experimentally estimated length of the reverse flow region was smallest (0.5-1.0 m) with a nominal freestream velocity of 0.1 m/s, and similar (1.1-1.4 m) with nominal freestream velocities of 0.3 and 0.5 m/s.",
    author = "Irma Welling and Ilpo Kulmala and Ing-Marie Andersson and Gunnar Rosen and Timo Mielo and Keijo Marttinen and Arto S{\"a}{\"a}m{\"a}nen and Raimo Niemel{\"a}",
    year = "2001",
    doi = "10.1080/10473220119185",
    language = "English",
    volume = "16",
    pages = "900--904",
    journal = "Journal of Occupational and Environmental Hygiene",
    issn = "1545-9624",
    publisher = "Taylor & Francis",
    number = "9",

    }

    Welling, I, Kulmala, I, Andersson, I-M, Rosen, G, Mielo, T, Marttinen, K, Säämänen, A & Niemelä, R 2001, 'Extent of the reverse flow wake region produced by a body in a uniform flow field', Applied Occupational and Environmental Hygiene, vol. 16, no. 9, pp. 900-904. https://doi.org/10.1080/10473220119185

    Extent of the reverse flow wake region produced by a body in a uniform flow field. / Welling, Irma; Kulmala, Ilpo; Andersson, Ing-Marie; Rosen, Gunnar; Mielo, Timo; Marttinen, Keijo; Säämänen, Arto; Niemelä, Raimo.

    In: Applied Occupational and Environmental Hygiene, Vol. 16, No. 9, 2001, p. 900-904.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Extent of the reverse flow wake region produced by a body in a uniform flow field

    AU - Welling, Irma

    AU - Kulmala, Ilpo

    AU - Andersson, Ing-Marie

    AU - Rosen, Gunnar

    AU - Mielo, Timo

    AU - Marttinen, Keijo

    AU - Säämänen, Arto

    AU - Niemelä, Raimo

    PY - 2001

    Y1 - 2001

    N2 - A reverse flow is created in front of an object placed in a uniform air stream that originates from behind the object. Gaseous contaminants may then be transported into the breathing zone of a worker from sources located within the reverse flow region. This should be taken into consideration when local ventilation systems are designed. The objective of this study was to characterize the reverse flow zone created in front of a worker in a uniform flow of air,using both experimental data and numerical simulation. Experiments were carried out by moving a point contaminant source on a table placed in front of the worker, and by measuring the contaminant concentration at nose level in front of the worker. The experimentally estimated length of the reverse flow region was smallest (0.5-1.0 m) with a nominal freestream velocity of 0.1 m/s, and similar (1.1-1.4 m) with nominal freestream velocities of 0.3 and 0.5 m/s.

    AB - A reverse flow is created in front of an object placed in a uniform air stream that originates from behind the object. Gaseous contaminants may then be transported into the breathing zone of a worker from sources located within the reverse flow region. This should be taken into consideration when local ventilation systems are designed. The objective of this study was to characterize the reverse flow zone created in front of a worker in a uniform flow of air,using both experimental data and numerical simulation. Experiments were carried out by moving a point contaminant source on a table placed in front of the worker, and by measuring the contaminant concentration at nose level in front of the worker. The experimentally estimated length of the reverse flow region was smallest (0.5-1.0 m) with a nominal freestream velocity of 0.1 m/s, and similar (1.1-1.4 m) with nominal freestream velocities of 0.3 and 0.5 m/s.

    U2 - 10.1080/10473220119185

    DO - 10.1080/10473220119185

    M3 - Article

    VL - 16

    SP - 900

    EP - 904

    JO - Journal of Occupational and Environmental Hygiene

    JF - Journal of Occupational and Environmental Hygiene

    SN - 1545-9624

    IS - 9

    ER -