174 citations · 1.3k across the 34 of their papers we have counts for
23 papers · 1 filter
Resonance behavior of a compliant piezo-driven inkjet channel with an entrained microbubble
Hans Reinten, Yogesh Jethani, Arjan Fraters +4
Microbubbles entrained in a piezo-driven drop-on-demand (DOD) printhead disturb the acoustics of the microfluidic ink channel and thereby the jetting behavior. Here, the resonance…
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…
Vorticity-induced flow-focusing leads to bubble entrainment in an inkjet printhead: synchrotron X-ray and volume-of-fluid visualizations
Maaike Rump, Youssef Saade, Uddalok Sen +4
The oscillatory flows present in an inkjet printhead can lead to strong deformations of the air-liquid interface at the nozzle exit. Such deformations may lead to an inward directe…
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…
Higher-order meniscus oscillations driven by flow-focusing leading to bubble pinch off and entrainment in a piezo acoustic inkjet nozzle
Arjan Frates, Maaike Rump, Roger Jeurissen +8
The stability of high-end piezo-acoustic drop-on-demand (DOD) inkjet printing is sometimes compromised by the entrainment of an air bubble inside the ink channel. Here, bubble pinc…
High-frequency acoustic droplet vaporization is initiated by resonance
Guilllaume Lajoinie, Tim Segers, Michel Versluis
Vaporization of low-boiling point droplets has numerous applications in combustion, process engineering and in recent years, in clinical medicine. However, the physical mechanisms…
The retraction of jetted slender viscoelastic liquid filaments
Uddalok Sen, Charu Datt, Tim Segers +4
Long and slender liquid filaments are produced during inkjet printing, which can subsequently either retract to form a single droplet, or break up to form a primary droplet and one…
Evaporation-Induced Crystallization of Surfactants in Sessile Multicomponent Droplets
Yaxing Li, Valentin Salvator, Herman Wijshoff +2
Surfactants have been widely studied and used in controlling droplet evaporation. In this work, we observe and study the crystallization of sodium dodecyl sulfate (SDS) within an e…
Rayleigh-Taylor instability by segregation in an evaporating multi-component microdroplet
Yaxing Li, Christian Diddens, Tim Segers +3
The evaporation of multi-component droplets is relevant to various applications but challenging to study due to the complex physicochemical dynamics. Recently, Li (2018) reported e…
Microuidics control the ballistic energy of thermocavitation liquid jets for needle-free injections
Loreto Oyarte Galvez, Arjan Fraters, Herman L. Offerhaus +3
Illuminating a water solution with a focused continuous wave laser produces a strong local heating of the liquid that leads to the nucleation of bubbles, also known as thermocavita…
Gravitational effect in evaporating binary microdroplets
Yaxing Li, Christian Diddens, Pengyu Lv +3
The flow in an evaporating glycerol-water binary sub-millimeter droplet with Bond number Bo 1 is studied both experimentally and numerically. First, we measure the flow field…
Microdroplets nucleation by dissolution of a multicomponent drop in a host liquid
Huanshu Tan, Christian Diddens, Ali Akash Mohammed +4
Multicomponent liquid drops in a host liquid are very relevant in various technological applications. Their dissolution or growth dynamics is complex. Differences in solubility bet…
Evaporation-triggered segregation of sessile binary droplets
Yaxing Li, Pengyu Lv, Christian Diddens +4
Droplet evaporation of multicomponent droplets is essential for various physiochemical applications, e.g. in inkjet printing, spray cooling and microfabrication. In this work, we o…
Evaporating pure, binary and ternary droplets: thermal effects and axial symmetry breaking
Christian Diddens, Huanshu Tan, Pengyu Lv +4
The Greek aperitif Ouzo is not only famous for its specific anise-flavored taste, but also for its ability to turn from a transparent miscible liquid to a milky-white colored emuls…
Self-wrapping of an ouzo drop induced by evaporation on a superamphiphobic surface
Huanshu Tan, Christian Diddens, Michel Versluis +3
Evaporation of multi-component drops is crucial to various technologies and has numerous potential applications because of its ubiquity in nature. Superamphiphobic surfaces, which…
Oblique drop impact onto a deep liquid pool
Marise V. Gielen, Pascal Sleutel, Jos Benschop +7
Oblique impact of drops onto a solid or liquid surface is frequently observed in nature. Most studies on drop impact and splashing, however, focus on perpendicular impact. Here, we…
Taming Acoustic Cavitation
David Fernandez Rivas, Bram Verhaagen, Oscar R. Enriquez +4
In this fluid dynamics video we show acoustic cavitation occurring from pits etched on a silicon surface. By immersing the surface in a liquid, gas pockets are entrapped in the pit…
Bubble size prediction in co-flowing streams
Wim van Hoeve, Benjamin Dollet, José M. Gordillo +2
In this paper, the size of bubbles formed through the breakup of a gaseous jet in a co-axial microfluidic device is derived. The gaseous jet surrounded by a co-flowing liquid strea…
Microbubble formation and pinch-off scaling exponent in flow-focusing devices
Wim van Hoeve, Benjamin Dollet, Michel Versluis +1
We investigate the gas jet breakup and the resulting microbubble formation in a microfluidic flow-focusing device using ultra high-speed imaging at 1 million frames/s. In recent ex…
Breakup of diminutive Rayleigh jets
Wim van Hoeve, Stephan Gekle, Jacco H. Snoeijer +3
Discharging a liquid from a nozzle at sufficient large velocity leads to a continuous jet that due to capillary forces breaks up into droplets. Here we investigate the formation of…
Collapse of Non-Axisymmetric Cavities
Oscar R. Enriquez, Ivo R. Peters, Stephan Gekle +4
A round disk with a harmonic disturbance impacts on a water surface and creates a non-axisymmetric cavity which collapses under the influence of hydrostatic pressure. We use disks…
On the sound of snapping shrimp
Michel Versluis, Barbara Schmitz, Anna von der Heydt +1
Fluid dynamics video: Snapping shrimp produce a snapping sound by an extremely rapid closure of their snapper claw. Our high speed imaging of the claw closure has revealed that the…
Leaping shampoo and the stable Kaye effect
Michel Versluis, Cor Blom, Devaraj van der Meer +2
Shear-thinning fluids exhibit surprisingly rich behaviour. One example is the Kaye effect which occurs when a thin stream of a solution of polyisobutylene in Decalin is poured into…