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Multiphase curved boundary condition in lattice Boltzmann method.

Yichen Yao1, Yangsha Liu1, Xingguo Zhong1

  • 1Guangxi Key Lab of Multi-source Information Mining & Security, Guangxi Normal University, Guilin 541004, China and School of Computer Science and Engineering, Guangxi Normal University, Guilin 541004, China.

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Summary
This summary is machine-generated.

This study introduces a new multiphase curved boundary condition for fluid flow simulations. The method enhances accuracy and ensures mass conservation in complex geometries, overcoming limitations of previous approaches.

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Area of Science:

  • Computational fluid dynamics
  • Multiphase flow modeling
  • Numerical methods

Background:

  • Boundary treatment is crucial for fluid flow simulations, particularly in the lattice Boltzmann method.
  • Curved boundary conditions enhance single-phase simulation accuracy for complex geometries.
  • Conventional methods struggle with multiphase flows, causing mass leakage or increase.

Purpose of the Study:

  • To address mass conservation issues in multiphase flow simulations with curved boundaries.
  • To propose an improved multiphase curved boundary condition for complex geometries.
  • To enhance the accuracy of multiphase simulations on curved boundaries.

Main Methods:

  • Incorporating nonideal effects into a linear interpolation scheme.
  • Compensating for interpolating errors in boundary condition calculations.
  • Developing a novel multiphase curved boundary condition for wetting boundaries.

Main Results:

  • The proposed scheme accurately treats wetting boundaries with complex geometries.
  • Static and dynamic multiphase simulations demonstrate improved performance.
  • The method effectively ensures mass conservation in simulations with large density ratios.

Conclusions:

  • The developed multiphase curved boundary condition overcomes limitations of conventional methods.
  • The approach significantly improves accuracy and mass conservation for multiphase flows.
  • This method is suitable for complex geometries and large density ratio simulations.