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<p>This study proposes an enhanced immersed boundary-lattice Boltzmann method (IB-LBM) incorporating distribution function correction for gas-liquid-solid multiphase flow simulations. The methodology characterizes the fluid-solid interactions disturbing the surrounding fluid through non-equilibrium distribution function analysis within the IB-LBM framework. A phase-field approach coupled with the conservative Allen-Cahn equation governs gas-liquid interface evolution, while an integrated scheme combining weighted capillary force calculation and diffused interface immersion boundary treatment addresses dynamic wetting phenomena at moving contact lines. Validation through four typical benchmark simulations, i.e., (1) a droplet spreading on a cylinder, (2) particle wetting behavior at a gas-liquid interface, (3) a circular cylinder submersion through an air-water interface, and (4) interfacial self-assembly of a triple-particle system, demonstrates the method’s reliability. Then, a systematic study of a particle that falls and collides with another particle at the air-water interface is conducted to investigate further the phase-significant deformation phenomenon accompanied by complex particle interaction in multiphase flow. Numerical simulations confirm the method’s capability to accurately model multiphase systems with multiple particles while maintaining mass conservation principles.</p>

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A distribution function correction-based immersed boundary Lattice Boltzmann method for gas-liquid-solid multiphase flows

  • 期刊论文

  • 发表日期：

    2026年7月11日

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  • Mufeng Chen,
  • Xiaodong Niu,
  • Peng Yu,
  • Jingfeng Ye,
  • Kangyang Zeng,
  • Jiaqing Li,
  • Xiang Li

摘要

This study proposes an enhanced immersed boundary-lattice Boltzmann method (IB-LBM) incorporating distribution function correction for gas-liquid-solid multiphase flow simulations. The methodology characterizes the fluid-solid interactions disturbing the surrounding fluid through non-equilibrium distribution function analysis within the IB-LBM framework. A phase-field approach coupled with the conservative Allen-Cahn equation governs gas-liquid interface evolution, while an integrated scheme combining weighted capillary force calculation and diffused interface immersion boundary treatment addresses dynamic wetting phenomena at moving contact lines. Validation through four typical benchmark simulations, i.e., (1) a droplet spreading on a cylinder, (2) particle wetting behavior at a gas-liquid interface, (3) a circular cylinder submersion through an air-water interface, and (4) interfacial self-assembly of a triple-particle system, demonstrates the method’s reliability. Then, a systematic study of a particle that falls and collides with another particle at the air-water interface is conducted to investigate further the phase-significant deformation phenomenon accompanied by complex particle interaction in multiphase flow. Numerical simulations confirm the method’s capability to accurately model multiphase systems with multiple particles while maintaining mass conservation principles.