Convection-dominated dissolution for single and multiple immersed sessile droplets
Kai Leong Chong, Yanshen Li, Chong Shen Ng, Roberto Verzicco, Detlef Lohse
Abstract
We numerically investigate both single and multiple droplet dissolution with droplets consisting of less dense liquid dissolving in a denser host liquid. In this situation, buoyancy can lead to convection and thus plays an important role in the dissolution process. The significance of buoyancy is quantified by the Rayleigh number , which thus hinders the enhancement. Our findings demonstrate a new mechanism in collective droplet dissolution, which is the merging of the plumes, which leads to non-trivial phenomena, contrasting the shielding effect.
Topics & Concepts
Materials scienceDissolutionChemical engineeringWettingThermodynamicsComposite materialWork (physics)MechanicsSurface tensionSurface (topology)Nanomaterials and Printing TechnologiesFluid Dynamics and Thin FilmsElectrowetting and Microfluidic Technologies