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Fluid-wall interactions in pseudopotential lattice Boltzmann models.

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This study introduces a new fluid-wall interaction force for pseudopotential lattice Boltzmann models, improving wetting condition predictions for various fluids. A reliable correlation for liquid contact angle on flat surfaces is also presented.

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Area of Science:

  • Computational physics
  • Fluid dynamics
  • Materials science

Background:

  • Pseudopotential lattice Boltzmann models are crucial for simulating fluid behavior.
  • Accurate simulation of fluid-wall interactions is essential for predicting wetting phenomena.
  • Existing models face challenges with multicomponent and partially miscible fluids.

Purpose of the Study:

  • To develop a modified fluid-wall interaction force for pseudopotential lattice Boltzmann models.
  • To ensure the model's applicability to both single-component and multicomponent fluids (e.g., hydrocarbon mixtures).
  • To propose a reliable correlation for predicting liquid contact angles on flat surfaces.

Main Methods:

  • Modification of the fluid-wall interaction force in pseudopotential lattice Boltzmann models.
  • Validation across single-component and partially miscible multicomponent fluid systems.
  • Development and testing of a predictive correlation for liquid contact angle.

Main Results:

  • The proposed modified fluid-wall interaction force enhances wetting condition simulations.
  • The model accurately handles both single-component and partially miscible multicomponent fluids.
  • The developed correlation reliably predicts liquid contact angles across diverse conditions.

Conclusions:

  • The modified fluid-wall interaction force offers a robust approach for pseudopotential lattice Boltzmann models.
  • The proposed correlation provides accurate contact angle predictions, simplifying wetting analysis.
  • This work advances the simulation accuracy of fluid-wall interactions and wetting phenomena.