Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Kirsten Harth"'
Publikováno v:
npj Microgravity, Vol 10, Iss 1, Pp 1-6 (2024)
Abstract A granular gas composed of monodisperse spherical particles was studied in microgravity experiments in a drop tower. Translations and rotations of the particles were extracted from optical video data. Equipartition is violated, the rotationa
Externí odkaz:
https://doaj.org/article/16c48384c1cd4a07ac6abf50c369645f
Publikováno v:
npj Microgravity, Vol 10, Iss 1, Pp 1-9 (2024)
Abstract Granular gases are fascinating non-equilibrium systems with interesting features such as spontaneous clustering and non-Gaussian velocity distributions. Mixtures of different components represent a much more natural composition than monodisp
Externí odkaz:
https://doaj.org/article/34a40d5bdcce4ad0beec0cc7efb67ab3
Autor:
Dmitry Puzyrev, David Fischer, Kirsten Harth, Torsten Trittel, Raúl Cruz Hidalgo, Eric Falcon, Martial Noirhomme, Eric Opsomer, Nicolas Vandewalle, Yves Garrabos, Carole Lecoutre, Fabien Palencia, Ralf Stannarius
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract Granular multiparticle ensembles are of interest from fundamental statistical viewpoints as well as for the understanding of collective processes in industry and in nature. Extraction of physical data from optical observations of three-dimen
Externí odkaz:
https://doaj.org/article/f76c4ee259184357aa1aa85648ed9f02
Publikováno v:
Crystals, Vol 12, Iss 8, p 1092 (2022)
Liquid-crystal columns were prepared and observed under microgravity aboard suborbital TEXUS rocket flights. The microgravity phase of each flight lasted for approximately six minutes. We tested structures in different liquid-crystalline mesophases.
Externí odkaz:
https://doaj.org/article/d57d3a8e60f5498192a14da9b2936711
Autor:
Kirsten Harth, Ralf Stannarius
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
We review the interactions and dynamics of topological defects in liquid crystals (LCs) in quasi-two-dimensional (2D) geometries. Such spatial restrictions can be realized in thin freely suspended smectic C films, in thin sandwich cells filled with n
Externí odkaz:
https://doaj.org/article/2d9d95b2a78649ac96cdad2a62b268f8
Publikováno v:
New Journal of Physics, Vol 24, Iss 9, p 093010 (2022)
Soft smooth particles in silo discharge show peculiar characteristics, including, for example, non-permanent clogging and intermittent flow. This paper describes a study of soft, low-frictional hydrogel spheres in a quasi-2D silo. We enforce a more c
Externí odkaz:
https://doaj.org/article/5619c26c31ec418dae2de2c65fce576f
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 013080 (2020)
We study the annihilation of topological defect pairs in the quasi-two-dimensional geometry of freely suspended smectic films. This elementary process is at the basis of all models describing the statistics of complex defect patterns. We prepare pair
Externí odkaz:
https://doaj.org/article/078e56d8ef6f4400a23ec439dd8b3098
Autor:
Mahdieh Mohammadi, Kirsten Harth, Dmitry Puzyrev, Tina Hanselka, Torsten Trittel, Ralf Stannarius
Publikováno v:
New Journal of Physics, Vol 22, Iss 12, p 123025 (2020)
We study the passage of active and passive granular particles through a bottleneck under gravitational bias. The grains are pharmaceutical capsules with spherocylindrical shapes on a vibrating table. The vibrating ground plate is slightly tilted in o
Externí odkaz:
https://doaj.org/article/0c574a0acf014a789945ed1f72c2ceb3
Autor:
Ralf Stannarius, Torsten Trittel, Christoph Klopp, Alexey Eremin, Kirsten Harth, Noel A Clark, Cheol S Park, Joseph E Maclennan
Publikováno v:
New Journal of Physics, Vol 21, Iss 6, p 063033 (2019)
Freely suspended smectic films with in-plane temperature inhomogeneities can exhibit remarkable thermocapillary (Marangoni) effects. The temperature dependence of the surface tension $\sigma (T)$ promotes flow in the film plane, convection roll patte
Externí odkaz:
https://doaj.org/article/d6e4f64ecc2b485d9efbb5955fe4e587
Autor:
Amine Missaoui, Kirsten Harth, Torsten Trittel, Christoph Klopp, Ralf Stannarius, Emmanuelle Lacaze
Publikováno v:
Soft Matter. 18:3193-3205
Smectic liquid crystals are fluids, and in most rheological situations they behave as such. Nevertheless, when thin freely floating films of smectic A or smectic C materials are compressed quickly in-plane, they resist such stress by buckling similar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d7dfbc4f165dad841500707cfa37d48
https://doi.org/10.1039/d2sm00144f
https://doi.org/10.1039/d2sm00144f