Lattice Boltzmann Method for Two-phase Flows on Unstructured Mesh

ORAL

Abstract

A lattice Boltzmann method with Galerkin finite element discretization (FE-LBM) is proposed to simulate incompressible two-phase flows on unstructured mesh. Two-distribution functions are used to recover the transport equations for the order parameter, pressure, and momentum. Consistent treatment of streaming and intermolecular forcing terms in FE-LBM enables us to use small equilibrium interface thickness compared with the existing two-phase LBMs and thus to achieve numerical stability at higher Reynolds number and large material property contrast. Several benchmark test cases with non-trivial wall boundaries will be presented, which include turbulent free surface flow inside a concentric rotating cylinder, drop impact on patterned surfaces, and bubbly flows.

*This work is partially supported by the DOE's NEUP.

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Authors

  • Taehun Lee

    • City College of City University of New York
    • Department of Mechanical Engineering, City College of City University of New York
    • Mechanical Engineering Department, City College of City University of New York
    • City College of New York
    • Department of Mechanical Engineering, City College of City University of New York, New York, 10031, USA
    • City College of the City University of New York
    • Mechanical Engineering, The City College of New York

  • Lina Baroudi

    • City College of City University of New York

  • Kent Wardle

    • Argonne National Laboratory