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Velocity interpolation based Bounce-Back scheme for non-slip boundary condition in Lattice Boltzmann Method (1903.01111v1)

Published 4 Mar 2019 in physics.flu-dyn and physics.comp-ph

Abstract: Lattice Boltzmann Method(LBM) has achieved considerable success on simulating complex flows. However, how to impose correct boundary conditions on the fluid-solid interface with complex geometries is still an open question. Here we proposed a velocity interpolation based bounce-back scheme where the ideas of interpolated bounce-back and non-equilibrium extrapolation are combined. The proposed scheme is validated by several well-defined benchmark cases. It is shown that the proposed scheme offers a better accuracy at high Reynolds number and less dependency on solids positions which may crucial in many engineering and science applications.

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