Surface wettability analysis using a microdroplet: a numerical approach

Analysis of hydrophobicity is essential for learning about the characteristics of molecules, surfaces, and materials that reject water. Using a two-dimensional (2D) pseudo-potential multiphase lattice Boltzmann approach with a D2Q9 model, this work examines the influence of solid-fluid interaction strength on wettability and hydrophobicity of smooth surfaces. To ascertain the contact angle and assess the accuracy of the numerical model, the study considers the equilibrium state of a water droplet on a smooth surface. In a 200×200 lattice unit domain, droplets having a radius of 60 lattice units are used to assess the hydrophobicity of smooth surfaces. According to the research, there is a large rise in the contact area between solid walls and water droplets when the solid-fluid interaction parameter is raised, which leads to a greater degree of hydrophobicity. By measuring the contact angle between the solid and fluid-vapor interface for different surfaces, it is observed that as G_ads becomes more negative, the contact angle decreases, indicating increased surface hydrophobicity, and the effect on droplet spreading is also highlighted in the research.

• Autores: Meshram, Ganesh; Biswal, Gloria; Khelkar, Ashish
• Tipo de recurso: Article of journal
• Fecha de publicación: 2025
• Institución: Universidad Tecnológica de Bolívar
• Repositorio: Repositorio Institucional UTB
• Idioma: eng
• OAI Identifier: oai:repositorio.utb.edu.co:20.500.12585/13563
• Acceso en línea: https://doi.org/10.32397/tesea.vol6.n1.676
• Palabra clave: Surface wettability; D2Q9 model; LBM; Solid-fluid interaction parameter; Contact angle
• Rights: openAccess
• License: Ganesh Meshram, Gloria Biswal, Ashish Khelkar - 2025