Numerical analysis of drop coalescence in cavity flow using CESE method

On the basis of the space-time conservation element and solution element method and by applying the hybrid particle level-set function, the drop coalescence in a dual-layer vertical channel has been numerically studied. Interactions between the flow field and the drop migration are observed. Main eddies and secondary vortexes induced by the drop coalescence are examined. Deformation and migration of the drop are mainly controlled through interfacial tension and the shear stress gradient. Drop coalescence is related to a viscous dissipation of energy. (c) 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).