Fluid-wall interactions in pseudopotential lattice Boltzmann models

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.