Zobrazeno 1 - 10
of 412
pro vyhledávání: '"Hardt, Steffen"'
The breakup dynamics of viscous liquid bridges on solid surfaces is studied experimentally. It is found that the dynamics bears similarities to the breakup of free liquid bridges in the viscous regime. Nevertheless, the dynamics is significantly infl
Externí odkaz:
http://arxiv.org/abs/2408.01790
The influence of chaotic capillary waves on the time-averaged shape of a liquid volume is studied experimentally and theoretically. In that context, a liquid film containing a stable hole is subjected to Faraday waves. The waves induce a shrinkage of
Externí odkaz:
http://arxiv.org/abs/2312.10005
Autor:
Sarma, Rajkumar, Hardt, Steffen
The thermoelectric response of thermally activated electrolytes (TAE) in a slit channel is studied theoretically and by numerical simulations. The term TAE refers to electrolytes whose charge carrier concentration is a function of temperature, as rec
Externí odkaz:
http://arxiv.org/abs/2310.08402
Autor:
Nicollier, Philippe M., Ratschow, Aaron D., Ruggeri, Francesca, Drechsler, Ute, Hardt, Steffen, Paratore, Federico, Knoll, Armin W.
The ability to control the location of nanoscale objects in liquids is essential for fundamental and applied research from nanofluidics to molecular biology. To overcome their random Brownian motion, the electrostatic fluidic trap creates local minim
Externí odkaz:
http://arxiv.org/abs/2309.12975
Autor:
Ratschow, Aaron D., Bauer, Lisa S., Bista, Pravash, Weber, Stefan A. L., Butt, Hans-Jürgen, Hardt, Steffen
Charge separation at moving three-phase contact lines is observed in nature as well as technological processes. Despite the growing number of experimental investigations in recent years, the physical mechanism behind the charging remains obscure. Her
Externí odkaz:
http://arxiv.org/abs/2305.02172
Publikováno v:
Phys. Rev. Lett. 131, 228201 (2023)
Slide electrification - the spontaneous charge separation by sliding water drops - can lead to an electrostatic potential of 1 kV and change drop motion substantially. To find out, how slide electrification influences the contact angles of moving dro
Externí odkaz:
http://arxiv.org/abs/2304.13461
Publikováno v:
Physical Review Letters 129, 264501 (2022)
Inducing transport in electrolyte-filled nanopores with dc fields has led to influential applications ranging from nanosensors to DNA sequencing. Here we use the Poisson-Nernst-Planck and Navier-Stokes equations to show that unbiased ac fields can in
Externí odkaz:
http://arxiv.org/abs/2207.09212
When the interface between a dielectric and a conducting liquid is excited by an oscillatory electric field, electrostatic Faraday waves can be induced. Here, we study the response of the interface to an AC electric field, which is superposed by eith
Externí odkaz:
http://arxiv.org/abs/2204.03580
Autor:
Baier, Tobias, Hardt, Steffen
Publikováno v:
J. Fluid Mech., 949, A34 (2022)
We study shear-driven liquid flow over a planar surface with an embedded gas-filled groove, with the gas-liquid interface protruding slightly above or below the planar surface. The flow direction is along the groove, taken to be much longer than wide
Externí odkaz:
http://arxiv.org/abs/2204.02200
Autor:
Dehe, Sebastian, Hardt, Steffen
Publikováno v:
Physical Review Fluids, 6(12), p.123702 (2021)
Fluidic interfaces disintegrate under sufficiently strong electric fields, leading to electrohydrodynamic (EHD) tip streaming. Taylor cones, which emit charged droplets from the tip of a conical cusp, are among the most prominent and well-studied exa
Externí odkaz:
http://arxiv.org/abs/2103.11194