Wetting boundary conditions for multicomponent pseudopotential lattice Boltzmann
Rodrigo C. V. Coelho, Catarina B. Moura, Margarida M. Telo da Gama, Nuno A. M. Araújo
Abstract
Abstract The implementation of boundary conditions is among the most challenging parts of modeling fluid flow through channels and complex media. Here, we show that the existing methods to deal with liquid‐wall interactions using multicomponent Lattice Boltzmann are accurate when the wall is aligned with the main axes of the lattice but fail otherwise. To solve this problem, we extend a strategy previously developed for multiphase models. As an example, we study the coalescence of two droplets on a curved surface in two dimensions. The strategy proposed here is of special relevance for binary flows in complex geometries.
Topics & Concepts
Lattice Boltzmann methodsPseudopotentialCoalescence (physics)Boundary value problemMultiphase flowMechanicsWettingBinary numberStatistical physicsPhysicsFlow (mathematics)Classical mechanicsComputational fluid dynamicsLattice (music)HPP modelFluid dynamicsMathematicsComplex fluidTwo-phase flowBubbleNo-slip conditionMathematical analysisBoltzmann equationMaterials scienceSurface (topology)Boundary (topology)GeometryFlow conditionsFluid mechanicsLattice Boltzmann Simulation StudiesFluid Dynamics and Heat TransferFluid Dynamics and Turbulent Flows