62 citations · 210 across the 12 of their papers we have counts for
12 papers
A single length scale rules ballistic aggregation: travels of a droplet train
Nathan Vani, Stefan Kooij, Aritro Mukherjee +3
Ballistic aggregation is a canonical non-equilibrium process, relevant across scales from granular gases to planetary accretion. Collisions are driven by differences in velocities,…
An Ice Christmas Tree: Fast Three-Dimensional Printing of Ice Structures via Evaporative Cooling in Vacuum
Menno Demmenie, Stefan Kooij, Daniel Bonn
We demonstrate a novel approach to three-dimensional (3D) printing of freeform ice structures by exploiting evaporative cooling. A micrometer-sized water jet is used to 3D print in…
Polarity-dependent Electroadhesion at Silicon Interfaces with Nanoscale Roughness
Liang Peng, Stefan Kooij, HT Ciftci +2
We measure and model electroadhesion across multi-asperity silicon interfaces with nanometer scale roughness. When electrically biased, our naturally oxidized silicon interfaces di…
What determines the breakup length of a jet?
Stefan Kooij, Daniel T. A. Jordan, Cees J. M. van Rijn +2
The breakup of a capillary jet into drops is believed to be governed by initial disturbances on the surface of the jet that grow exponentially. The disturbances are often assumed t…
Transition from viscoelastic to fracture-like peeling of pressure-sensitive adhesives
Marion Grzelka, Stefan Kooij, Sander Woutersen +2
We investigate the process of the slow unrolling of a roll of typical pressure-sensitive adhesive, Scotch tape, under its own weight. Probing the peeling velocities down to nm/s re…
Droplet impact of Newtonian fluids and blood on simple fabrics: effect of fabric pore size and underlying substrate
T. C. de Goede, A. M. Moqaddam, K. C. M. Limpens +5
When a droplet impacts a fabric mesh at a sufficiently high impact velocity, it not only spreads over the fabric but also penetrate its pores. To determine the influence of this li…
Mechanical properties of fat-based semi solid heterogeneous materials
Henri de Cagny, Stefan Kooij, Theo Blijdenstein +3
Fat based pasty products are an essential part of food industries, both as process intermediate or end products. Such materials are made of a continuous fat phase in which solid pa…
Evaporation of dilute sodium dodecyl sulfate droplets on a hydrophobic substrate
Wojciech Kwieciński, Tim Segers, Sjoerd van der Werf +4
Evaporation of surfactant laden sessile droplets is omnipresent in nature and industrial applications such as inkjet printing. Soluble surfactants start to form micelles in an aque…
How surfactants influence the drop size in sprays
R. Sijs, S. Kooij, D. Bonn
Spraying is a widely used method to produce a liquid sheet that break up into droplets of a certain size distribution. When spraying simple liquids, it is known which experimental…
Characterizing nonaffinity upon decompression of soft-sphere packings
Stefan Kooij, Edan Lerner
Athermal elastic moduli of soft sphere packings are known to exhibit universal scaling properties near the unjamming point, most notably the vanishing of the shear-to-bulk moduli r…
Sprays from droplets impacting a mesh
Stefan Kooij, Ali Mazloomi Moqaddam, Thijs C. de Goede +4
In liquid spray applications, the sprays are often created by the formation and destabilization of a liquid sheet or jet. The disadvantage of such atomization processes is that the…
Unjamming in models with analytic pairwise potentials
Stefan Kooij, Edan Lerner
The canonical models for studying the unjamming scenario in systems of soft repulsive particles assume pairwise potentials with a sharp cut-off in the interaction range. The sharp…