4 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…