Peculiarities in the orientational dynamics caused by a thermomechanical force in a nematic microfluidic channel
Izabela Śliwa , Alex V. Zakharov
AbstractWe have described a numerical study of the hydrodynamic flow in a hybrid-aligned nematic (HAN) microfluidic channel excited by a thermomechanical force, caused by coupling between gradients of the director field and the vertically applied temperature gradient ∇T. Calculations show that due to the thermomechanical force, the microsized nematic layer being initially in the rest, if heated both from below or above, starts moving in the horizontal direction. It has been shown that the magnitude and direction of the hydrodynamic flow, excited by the vertically applied heat flux q, are influenced both by the magnitude and direction of q, whereas the character of the preferred anchoring of the LC molecules to the restricted surfaces is almost invisible. The role the pretransitional SmA fluctuations in the peculiarities in the relaxation processes, when the temperature on the bounding surfaces is reduced towards TNA, e.g., at a few tens of mK above a nematic-smectic-A (NA) phase transition temperature TNA, for hydrodynamic presmectic regime in 4 − n − octyl − 4′ − cyanobiphenyl HAN microfluidic channel also has been investigated.
|Journal series||Journal of Molecular Liquids, ISSN 0167-7322, e-ISSN 1873-3166, (N/A 100 pkt)|
|Publication size in sheets||0.5|
|Keywords in Polish||ciekły kryształy, dynamika, siła termomechaniczna|
|Keywords in English||liquid crystals, microfluidic, thermomechanical force|
|ASJC Classification||; ; ; ; ;|
|Score||= 100.0, 20-07-2020, ArticleFromJournal|
|Publication indicators||= 0; : 2018 = 1.275; : 2018 = 4.561 (2) - 2018=4.136 (5)|
|Uwagi||First online: Available online 28 February 2020|
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