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    Analysis of a turbulent buoyant confined jet modeled using realizable k-ε model

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    Type
    Article
    Authors
    El-Amin, Mohamed cc
    Sun, Shuyu cc
    Heidemann, Wolfgang
    Müller-Steinhagen, Hans M.
    KAUST Department
    Computational Transport Phenomena Lab
    Earth Science and Engineering Program
    Environmental Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2010-06-13
    Online Publication Date
    2010-06-13
    Print Publication Date
    2010-10
    Permanent link to this record
    http://hdl.handle.net/10754/561559
    
    Metadata
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    Abstract
    Through this paper, analyses of components of the unheated/heated turbulent confined jet are introduced and some models to describe them are developed. Turbulence realizable k-ε model is used to model the turbulence of this problem. Numerical simulations of 2D axisymmetric vertical hot water confined jet into a cylindrical tank have been done. Solutions are obtained for unsteady flow while velocity, pressure, temperature and turbulence distributions inside the water tank are analyzed. For seeking verification, an experiment was conducted for measuring of the temperature of the same system, and comparison between the measured and simulated temperature shows a good agreement. Using the simulated results, some models are developed to describe axial velocity, centerline velocity, radial velocity, dynamic pressure, mass flux, momentum flux and buoyancy flux for both unheated (non-buoyant) and heated (buoyant) jet. Finally, the dynamics of the heated jet in terms of the plume function which is a universal quantity and the source parameter are studied and therefore the maximum velocity can be predicted theoretically. © 2010 Springer-Verlag.
    Sponsors
    The first author would like to thank the Alexander von Humboldt (AvH) Foundation, Germany for funding the post-doctoral fellowship.
    Publisher
    Springer Nature
    Journal
    Heat and Mass Transfer
    DOI
    10.1007/s00231-010-0625-3
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00231-010-0625-3
    Scopus Count
    Collections
    Earth Science and Engineering Program; Computational Transport Phenomena Lab; Physical Science and Engineering (PSE) Division; Environmental Science and Engineering Program; Articles

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