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    Implicitly coupled phase fraction equations for polydisperse flows

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    Implicitly_coupled_phase_fraction_equations_for_polydisperse_flows.pdf
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    Format:
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    Description:
    Accepted Manuscript
    Embargo End Date:
    2021-11-28
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    Type
    Article
    Authors
    Keser, Robert cc
    Ceschin, Alberto
    Battistoni, Michele cc
    Im, Hong G. cc
    Jasak, Hrvoje cc
    KAUST Department
    Mechanical Engineering
    Physical Science and Engineering (PSE) Division
    Mechanical Engineering Program
    Clean Combustion Research Center
    KAUST Grant Number
    OSR-2017-CRG6-3409.03
    Date
    2020-11-28
    Embargo End Date
    2021-11-28
    Submitted Date
    2020-06-16
    Permanent link to this record
    http://hdl.handle.net/10754/666258
    
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    Abstract
    This work presents the implementation, verification and the validation of an incompressible Eulerian multi-fluid model for polydisperse flows. The proposed model uses a novel monolithic, i.e. implicitly coupled phase continuity equation for an arbitrary number of fluids, where the breakup source and sink terms are handled implicitly in the block-system. The implemented model is tested for an upward bubbly flow inside a large vertical pipe. The selected flow conditions exhibit both breakup and coalescence. The grid refinement study is conducted on four structured grids with varying levels of refinement. In the validation section, the numerical results are compared to the TOPFLOW experimental measurements. The last presented test examines the performance of the novel implicitly coupled phase continuity equation to the corresponding segregated formulation and the standard segregated formulation. The performance is evaluated by comparing the conservation error over the non-linear iterations. The presented model exhibits good agreement with the experimental measurements and gives stable results on various grids with different levels of refinement. Moreover, the implicit coupling reduces the conservation error during the calculation.
    Citation
    Keser, R., Ceschin, A., Battistoni, M., Im, H. G., & Jasak, H. (2020). Implicitly coupled phase fraction equations for polydisperse flows. International Journal for Numerical Methods in Fluids. doi:10.1002/fld.4945
    Sponsors
    King Abdullah University of Science and Technology, Grant/Award Number:OSR-2017-CRG6-3409.03; CroatianScience Foundation, Grant/Award Number:DOK-01-2018.
    Publisher
    Wiley
    Journal
    International Journal for Numerical Methods in Fluids
    DOI
    10.1002/fld.4945
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1002/fld.4945
    ae974a485f413a2113503eed53cd6c53
    10.1002/fld.4945
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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