Improved phase-field-based lattice Boltzmann models with a filtered collision operator

Hiroshi Otomo, Raoyang Zhang () and Hudong Chen ()
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Hiroshi Otomo: Dassault Systémes, 55 Network Drive, Burlington, MA 01803, USA
Raoyang Zhang: Dassault Systémes, 55 Network Drive, Burlington, MA 01803, USA
Hudong Chen: Dassault Systémes, 55 Network Drive, Burlington, MA 01803, USA

International Journal of Modern Physics C (IJMPC), 2019, vol. 30, issue 10, 1-11

Abstract: In this study, a phase-field lattice Boltzmann model based on the Allen–Cahn equation with a filtered collision operator and high-order corrections in the equilibrium distribution functions is presented. Here, we show that in addition to producing numerical results consistent with prior numerical methods, analytic solutions, and experiments with the density ratio of 1000, previous numerical deficiencies are resolved. Specifically, the new model is characterized by robustness at low viscosity, accurate prediction of shear stress at interfaces, and removal of artificial dense bubbles and rarefied droplets, etc.

Keywords: Phase-field lattice Boltzmann model; Allen–Cahn equation; filtered collision operator; high density ratio (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0129183119410092

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