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.

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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