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    Area of Science:

    • Computational fluid dynamics
    • Multiphase flow simulation
    • Fluid-solid interaction modeling

    Background:

    • Multiphase and multi-component fluid flows present significant simulation challenges.
    • Existing methods often struggle with accuracy, efficiency, stability, or memory consumption.
    • Incorporating fluid-solid interactions further complicates these simulations.

    Purpose of the Study:

    • To develop a novel, practical hybrid solver for simulating complex fluid flows.
    • To enhance accuracy and computational efficiency while reducing memory usage.
    • To effectively handle multiphase, multi-component flows with fluid-solid interactions.

    Main Methods:

    • A hybrid solver combining a collision-enhanced lattice Boltzmann method and a finite-volume approach.
    • Phase-field modeling with a novel wetting boundary treatment within the finite-volume framework.
    • An immersed-boundary method for efficient fluid-solid interaction handling.

    Main Results:

    • The hybrid solver effectively simulates multiphase, multi-component flows with rich interfacial behaviors.
    • Physically consistent and accurate results were confirmed through validation tests.
    • Significant reductions in memory consumption and improved efficiency compared to conventional methods were demonstrated.

    Conclusions:

    • The novel hybrid solver offers a practical and superior solution for complex fluid flow simulations.
    • The method demonstrates enhanced accuracy, efficiency, and reduced memory footprint.
    • It is well-suited for simulating diverse fluid dynamics scenarios, including fluid-solid interactions.