Please use this identifier to cite or link to this item:
Title: Freely suspended smectic films with in-plane temperature gradients
Author(s): Stannarius, Ralf
Trittel, Torsten
Klopp, Christoph
Eremin, Alexey
Harth, Kirsten
Clark, Noel A.
Park, Cheol S.
Maclennan, Joseph E.
Issue Date: 2019
Type: Article
Language: English
URN: urn:nbn:de:gbv:ma9:1-1981185920-370453
Subjects: Marangoni flow
Freely suspended thin fluid films
Smectic liquid crystals
Abstract: Freely suspended smectic films with in-plane temperature inhomogeneities can exhibit remarkable thermocapillary (Marangoni) effects. The temperature dependence of the surface tension s(T) promotes flow in the film plane, convection roll patterns, and climbing of smectic layers against gravitational forces.Wediscuss several experimental geometries where macroscopic material transport is driven by temperature gradients, including experiments under normal gravity and observations in microgravitation during suborbital rocket flights and on the International Space Station. In all these experiments, the temperature dependence of the surface tension drives unidirectional material flow. The divergence of this flow near the hot and cold film edges, and at the boundaries of film islands in the film, is associated with the creation, motion and removal of dislocations. These dissipative processes limit the flow velocity.
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
Sponsor/Funder: DFG-Publikationsfonds 2019
Journal Title: New journal of physics
Publisher: Dt. Physikalische Ges.
Publisher Place: [Bad Honnef]
Volume: 21
Issue: 6
Original Publication: 10.1088/1367-2630/ab2673
Page Start: 1
Page End: 14
Appears in Collections:Fakultät für Naturwissenschaften (OA)

Files in This Item:
File Description SizeFormat 
Stannarius et al._Freely_2019.pdfZweitveröffentlichung1.38 MBAdobe PDFThumbnail