8 papers
Leidenfrost droplets: The roles of ambient humidity and internal droplet circulation
Maxim de Wildt, Andrea Prosperetti, Christian Diddens +1
A volatile droplet gently deposited on a superheated substrate can sit on a thin film of its own vapour, which prevents contact between the drop and surface. This phenomenon is cal…
Upstream motion of oil droplets in co-axial Ouzo flow due to Marangoni forces
Steffen Bisswanger, Duarte Rocha, Sebastian Dehe +4
To explore the physicochemical hydrodynamics of phase-separating ternary liquids (Ouzo-type), a binary oil-ethanol mixture is introduced into a co-flowing stream of water. Oil drop…
Symmetry Breaking in Chemical Systems: Engineering Complexity through Self-Organization and Marangoni Flows
Sangram Gore, Binaya Paudyal, Duarte Rocha +7
Far from equilibrium, chemical and biological systems can form complex patterns and waves through reaction-diffusion coupling. Fluid motion often interferes with these self-organiz…
Internal flow and concentration in neighbouring evaporating binary droplets and rivulets
Pim J. Dekker, Duarte Rocha, Christian Diddens +1
In this paper, the evaporation of neighbouring multi-component droplets or rivulets - often found in applications such as inkjet printing, spray cooling, and pesticide delivery - i…
Non-monotonic surface tension leads to spontaneous symmetry breaking in a binary evaporating drop
Christian Diddens, Pim J. Dekker, Detlef Lohse
The evaporation of water/1,2-hexanediol binary drops shows remarkable segregation dynamics, with hexanediol-rich spots forming at the rim, thus breaking axisymmetry. While the segr…
Marangoni flow driven hysteresis and azimuthal symmetry breaking in evaporating binary droplets
Duarte Rocha, Detlef Lohse, Christian Diddens
The non-uniform evaporation rate at the liquid-gas interface of binary droplets induces solutal Marangoni flows. In glycerol-water mixtures (positive Marangoni number, where the mo…