Surface jets and internal mixing during the coalescence of impacting and sessile droplets
Thomas C. Sykes, Alfonso A. Castrejón-Pita, J. Rafael Castrejón-Pita, David Harbottle, Zinedine Khatir, Harvey M. Thompson, Mark C. T. Wilson
Abstract
A surface jet during droplet coalescence is identified and studied using two color high-speed cameras with side and bottom views. By introducing a surface tension difference between the droplets, the internal dynamics can be modified, while the surface jet can either be enhanced or suppressed. A mechanism to control mixing is therefore established.
Topics & Concepts
Coalescence (physics)Mixing (physics)Materials scienceMechanicsSurface tensionSolid surfaceSurface (topology)Jet (fluid)Flat surfaceOpticsWork (physics)Dynamics (music)ChemistryFluid Dynamics and Heat TransferNanomaterials and Printing TechnologiesSurface Modification and Superhydrophobicity