TY - JOUR
T1 - Freely suspended smectic films with in-plane temperature gradients
AU - Stannarius, Ralf
AU - Trittel, Torsten
AU - Klopp, Christoph
AU - Eremin, Alexey
AU - Harth, Kirsten
AU - Clark, Noel A.
AU - Park, Cheol S.
AU - MacLennan, Joseph E.
PY - 2019/6/21
Y1 - 2019/6/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85067357488&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/ab2673
DO - 10.1088/1367-2630/ab2673
M3 - Article
AN - SCOPUS:85067357488
SN - 1367-2630
VL - 21
JO - New journal of physics
JF - New journal of physics
IS - 6
M1 - 063033
ER -