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[Fizinfo] Szemináriumok - Seminars: Kirsten Harth

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  • From: Szeminárium koordinátor <szfi-seminar AT>
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  • Subject: [Fizinfo] Szemináriumok - Seminars: Kirsten Harth
  • Date: Thu, 28 Nov 2019 06:26:02 +0100 (CET)
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SZFI SeminarKirsten HarthUniversity of Magdeburg (host: Börzsönyi Tamás)From
viscous to elastic sheets: Dynamics of thin free-standing smectic
filmsTuesday, 3 December 2019, 10:00, KFKI Campus, Bldg. 1, 2nd floor,
Conference RoomThin fluid membranes and bubbles are of considerable
importance in biological, environmental, and technical contexts. Soap
bubbles, vesicles and components of biological cells are well known examples
where dynamic features are significantly influenced by the properties of thin
fluid membranes enclosed by fluids. Two-dimensional membrane motions couple
to 3D shape transformations. Smectic phases possess an internal molecular
layer structure, which allows easy preparation of thin free-standing films.
Those represent simple models for the study of membrane dynamics and pattern
formation in quasi two-dimensional fluids. Literature mostly deals with
nematic materials in sandwich cells, or planar smectic films spanned over a
frame, with static or only slowly changing shapes and surface areas. Smectic
films can easily be generated in the form of bubbles or catenoids as well. We
study rapid shape transformations of smectic films and bubbles. The internal
layer structure produces very peculiar dynamics, with a transition between a
quasi-elastic response on short time scales and a fluid-like response to slow
changes. The seminar will discuss exemplary experimental situations,
including shape relaxation of bubbles in micro-gravity conditions and film
rupture. We present first numerical results reproducing the phenomena
qualitatively.&nbsp;Minden érdeklődőt szívesen látunk! - Everyone is welcome
to attend.Róbert Juhászszfi-seminar AT

  • [Fizinfo] Szemináriumok - Seminars: Kirsten Harth, Szeminárium koordinátor, 11/28/2019

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