202 citations · 1.1k across the 37 of their papers we have counts for
37 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…
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…
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…
Evaporating sessile droplets: solutal Marangoni effects overwhelm thermal Marangoni flow
Duarte Rocha, Philip L. Lederer, Pim J. Dekker +3
When an evaporating water droplet is deposited on a thermally conductive substrate, the minimum temperature will be at the apex due to evaporative cooling. Consequently, density an…
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…
Role of surfactants on droplet formation in piezoacoustic inkjet printing across microsecond-to-second timescales
Maaike Rump, Christian Diddens, Uddalok Sen +3
In piezo acoustic drop-on-demand inkjet printing a single droplet is produced for each piezo driving pulse. This droplet is typically multicomponent, including surfactants to contr…
Deforming ice with drops
Duco van Buuren, Pallav Kant, Jochem G. Meijer +2
A uniform solidification front undergoes non-trivial deformations when encountering an insoluble dispersed particle in a melt. For solid particles, the overall deformation characte…
Evaporation of acoustically levitated bicomponent droplets: mass and heat transfer characteristics
Yuki Wakata, Xing Chao, Chao Sun +1
Evaporation of multicomponent droplets is important in a wide range of applications, albeit complex, and requires a careful investigation. We experimentally and numerically investi…
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…
Enhanced bubble growth near an advancing solidification front
Jochem G. Meijer, Duarte Rocha, Annemarie M. Linnenbank +2
Frozen water might appear opaque since gas bubbles can get trapped in the ice during the freezing process. They nucleate and then grow near the advancing solidification front, due…
Bifurcation tracking on moving meshes and with consideration of azimuthal symmetry breaking instabilities
Christian Diddens, Duarte Rocha
We present a black-box method to numerically investigate the linear stability of arbitrary multi-physics problems. While the user just has to enter the system's residual in weak fo…
On the rising and sinking motion of bouncing oil drops in strongly stratified liquids
Jochem G. Meijer, Yanshen Li, Christian Diddens +1
When an immiscible oil drop is immersed in a stably stratified ethanol-water mixture, the Marangoni flow on the surface of the drop can experience an oscillatory instability, so th…
Interfacial aggregation of self-propelled Janus colloids in sessile droplets
Maziyar Jalaal, Borge ten Hagen, Hai le The +3
Living microorganisms in confined systems typically experience an affinity to populate boundaries. The reason for such affinity to interfaces can be a combination of their directed…
Evaporation of binary liquids from a capillary tube
Lijun Thayyil Raju, Christian Diddens, Javier Rodríguez-Rodríguez +4
Evaporation of multi-component liquid mixtures in confined geometries, such as capillaries, is crucial in applications such as microfluidics, two-phase cooling devices, and inkjet…
Evaporation-driven liquid flow in sessile droplets
Hanneke Gelderblom, Christian Diddens, Alvaro Marin
The evaporation of a sessile droplet spontaneously induces an internal capillary liquid flow. The surface-tension driven minimisation of surface area and/or surface-tension differe…
Evaporation of a sessile colloidal water-glycerol droplet: Marangoni ring formation
Lijun Thayyil Raju, Christian Diddens, Yaxing Li +4
The transport and aggregation of particles in suspensions is an important process in many physicochemical and industrial processes. In this work, we study the transport of particle…
Physiochemical hydrodynamics of the phase segregation in an evaporating binary microdroplet
Yaxing Li, Pengyu Lv, Christian Diddens +1
Phase segregation triggered by selective evaporation can emerge in multicomponent systems, leading to complex physiochemical hydrodynamics. Recently, Li et al. (Phys. Rev. Lett., v…
Sessile drop evaporation in a gap -- crossover between diffusion-limited and phase transition-limited regime
S. Hartmann, C. Diddens, M. Jalaal +1
We consider the time evolution of a sessile drop of volatile partially wetting liquid on a rigid solid substrate. Thereby, the drop evaporates under strong confinement, namely, it…
Selective evaporation at the nozzle exit in piezoacoustic inkjet printing
Maaike Rump, Uddalok Sen, Roger Jeurissen +5
In practical applications of inkjet printing the nozzles in a printhead have intermittent idle periods, during which ink can evaporate from the nozzle exit. Inks are usually multic…
Droplet dissolution driven by emerging thermal gradients and Marangoni flow
Binglin Zeng, Yuliang Wang, Christian Diddens +2
The lifetime of an isothermal and purely diffusively dissolving droplet in a host liquid scales as with its initial radius [Langmuir, Phys. Rev. 12, 368 (19…
Oscillatory droplet dissolution from competing Marangoni and gravitational flows
Ricardo Arturo Lopez de la Cruz, Christian Diddens, Xuehua Zhang +1
The dissolution or growth of a droplet in a host liquid is an important part for processes like chemical extraction, chromatography or emulsification. In this work we look at the d…
The asymmetric coalescence of two droplets with different surface tensions is caused by capillary waves
Michiel A. Hack, Patrick Vondeling, Menno Cornelissen +4
When two droplets with different surface tensions collide, the shape evolution of the merging droplets is asymmetric. Using experimental and numerical techniques, we reveal that th…
Time-resolved velocity and pressure field quantification in a flow-focusing device for ultrafast microbubble production
Sarah Cleve, Christian Diddens, Tim Segers +2
Flow-focusing devices have gained great interest in the past decade, due to their capability to produce monodisperse microbubbles for diagnostic and therapeutic medical ultrasound…