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    A PDF Dispersion Model for Buoyant Plumes in the Convective Boundary Layer

    Source: Journal of Applied Meteorology:;1997:;volume( 036 ):;issue: 008::page 982
    Author:
    Weil, J. C.
    ,
    Corio, L. A.
    ,
    Brower, R. P.
    DOI: 10.1175/1520-0450(1997)036<0982:APDMFB>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A probability density function (PDF) dispersion model is presented for buoyant plumes in the convective boundary layer (CBL), where the mean concentration field C is obtained from the PDFs py and pz of tracer particle position in the lateral y and vertical z directions. The py is assumed to be Gaussian, whereas the pz is derived from the the vertical velocity PDF, which is skewed. Three primary sources contribute to the modeled C field: 1) the ?direct? or real source at the stack, 2) an ?indirect? source to account for the slow downward dispersion of lofting plumes from the CBL top, and 3) a ?penetrated? source to treat material that initially penetrates the elevated inversion but later fumigates into the CBL. Image sources are included to satisfy the zero-flux conditions at the ground and the CBL top. Comparisons between the modeled crosswind-integrated concentration fields Cy and convection tank data show fair to good agreement in the lower half of the CBL. In particular, the Cy profiles at the surface agree with the data over a wide range of the dimensionless buoyancy flux F? and show a systematic decrease in Cy with F?. Comparisons between the modeled and observed ground-level concentrations around several power plants exhibit good agreement on average and are considerably better than those obtained with a standard Gaussian plume model. A residual analysis suggests some areas for future model development.
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      A PDF Dispersion Model for Buoyant Plumes in the Convective Boundary Layer

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4147859
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    contributor authorWeil, J. C.
    contributor authorCorio, L. A.
    contributor authorBrower, R. P.
    date accessioned2017-06-09T14:06:21Z
    date available2017-06-09T14:06:21Z
    date copyright1997/08/01
    date issued1997
    identifier issn0894-8763
    identifier otherams-12511.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4147859
    description abstractA probability density function (PDF) dispersion model is presented for buoyant plumes in the convective boundary layer (CBL), where the mean concentration field C is obtained from the PDFs py and pz of tracer particle position in the lateral y and vertical z directions. The py is assumed to be Gaussian, whereas the pz is derived from the the vertical velocity PDF, which is skewed. Three primary sources contribute to the modeled C field: 1) the ?direct? or real source at the stack, 2) an ?indirect? source to account for the slow downward dispersion of lofting plumes from the CBL top, and 3) a ?penetrated? source to treat material that initially penetrates the elevated inversion but later fumigates into the CBL. Image sources are included to satisfy the zero-flux conditions at the ground and the CBL top. Comparisons between the modeled crosswind-integrated concentration fields Cy and convection tank data show fair to good agreement in the lower half of the CBL. In particular, the Cy profiles at the surface agree with the data over a wide range of the dimensionless buoyancy flux F? and show a systematic decrease in Cy with F?. Comparisons between the modeled and observed ground-level concentrations around several power plants exhibit good agreement on average and are considerably better than those obtained with a standard Gaussian plume model. A residual analysis suggests some areas for future model development.
    publisherAmerican Meteorological Society
    titleA PDF Dispersion Model for Buoyant Plumes in the Convective Boundary Layer
    typeJournal Paper
    journal volume36
    journal issue8
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1997)036<0982:APDMFB>2.0.CO;2
    journal fristpage982
    journal lastpage1003
    treeJournal of Applied Meteorology:;1997:;volume( 036 ):;issue: 008
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian