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Related Experiment Videos

Lattice Boltzmann model with nearly constant density.

Hai-ping Fang1, Rong-zheng Wan, Zhi-fang Lin

  • 1Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, P.O. Box 800-204, Shanghai 201800, China.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 9, 2002
PubMed
Summary

This study introduces an improved lattice Boltzmann model for fluid flow simulations, effectively reducing density fluctuations. The new model enhances accuracy for simulating flows with nearly constant fluid density.

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Area of Science:

  • Computational fluid dynamics
  • Fluid mechanics
  • Numerical modeling

Background:

  • Lattice Boltzmann models are widely used for fluid flow simulations.
  • Previous models faced challenges in accurately simulating flows with nearly constant density.
  • Density fluctuations can impact the reliability of simulation results.

Purpose of the Study:

  • To develop an improved lattice Boltzmann model for fluid flow simulation.
  • To enhance the simulation of fluid flow with nearly constant density.
  • To reduce density fluctuations and improve accuracy.

Main Methods:

  • Incorporation of an extra relaxation term for fluid density.
  • Introduction of a feedback equation in equilibrium distribution functions.

Related Experiment Videos

  • Numerical simulations of plane Poiseuille and Womersley flows.

    • Main Results:

    • The improved model effectively reduces density fluctuations.
    • Accurate simulation of fluid flow with nearly constant density is achieved.
    • The model shows improved results for both steady and unsteady flow cases.

    Conclusions:

    • The enhanced lattice Boltzmann model provides more accurate simulations for fluid flow with nearly constant density.
    • The method effectively suppresses density fluctuations, improving overall simulation quality.
    • This approach offers a significant advancement over previous lattice Boltzmann models.