An Improved Lattice Boltzmann Model for Immiscible Fluids

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概要

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• We proposed an improved immiscible lattice BGK model for simulating multiphase flows. The surface tension effect was recovered by introducing a force term based on the appropriate continuum physics. The anti-diffusion scheme in the mixed region was applied to reduce the side-effect of recoloring step and control the thickness of the interface. The simulation of a static bubble was used as a test case. Laplace's law, spurious velocities and isotropy property were examined. The results show that our model has more advantages for simulations of immiscible fluids over the existing immiscible lattice BGK models. Furthermore, the simulations of droplet formation in a Cross-junction microchannel were performed and compared with the experiments. The numerical results show good agreements with the experimental ones for the evolution of the droplet.

著者

• Tsutahara Michihisa

  Graduate School Of Engineering Mechanical Engineering Kobe University

• WU Long

  Graduate School of Science and Technology, Kobe University

• TAJIRI Shinsuke

  Graduate School of Science and Technology, Kobe University

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