Initial coalescence between a drop and a liquid pool: A lattice Boltzmann investigation validated by experiments
Year: 2024
Type: article
Abstract: We present a numerical investigation of the coalescence of a drop with a pool of the same liquid. The simulations were carried out with both viscous Newtonian and viscoelastic fluids based on an axisymmetric high density ratio lattice Boltzmann method with a diffuse interface coupled with the Oldroyd-B Model. Particular attention was paid to the widening dynamics of the liquid bridge between the drop and the pool and to the velocity fields within both the drop and liquid bulk. The results were compared with experimental data obtained using a high-speed camera and a micro-particle image velocimetry (μ-PIV) and displayed satisfactory agreement. In particular, the simulated temporary evolution of the rescaled coalescing width of the liquid bridge as a function of the normalized time compares favorably with the experimental results for both the inertially limited viscous and the inertial regimes for short and long time.
Source: Physics of Fluids
DOI: 10.1063/5.0238233
Authors: E. Collignon, Q. D. Zhang, X. Frank, Huai Z. Li
Institutions: Centre National de la Recherche Scientifique, Laboratoire Réactions et Génie des Procédés, Université de Lorraine, Guangzhou University, Université de Montpellier, Institut Agro Montpellier, Ingénierie des Agropolymères et Technologies Emergentes, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4405076329