A two-dimensional modeling of binary coalescence time using the two-color lattice-Boltzmann method

A lattice-Boltzmann method (LBM) was used for simulation of the 2D binary coalescence of droplets. The main subject of our interests is the influence of the droplet size and the interfacial tension on binary coalescence time (BCT). The BCT of two free particles as well as the case when one of the particles is deposited on the surface is considered. The results of calculations are in good agreement with experimental data presented in other papers.

Research highlights
► Two-dimensional two-color LBM modeling is efficient and useful tool for modeling of coalescence process.
► The binary coalescence time of two droplets depends strongly on the difference between their radii.
► The coalescence time when one of the droplet is deposited on solid surface is shorter than when both droplets are free.
► If the coalescence between the free and deposited droplet occurs, the binary coalescence time depends strongly on contact angle but is nearly independent on the shape of solid surface.