Nonmechanical principle for producing a flow in a homogeneously aligned microfluidic nematic channel

Izabela Śliwa , Alex V. Zakharov

Abstract

Nonmechanical fluid pumping principle has been developed utilizing the interactions of both the director nˆ and velocity v fields and temperature T redistribution across a two-dimensional homogeneouslyaligned nematic (HAN) microfluidic channel under the influence both of a heat flux q and the surface electric field E0, originating from the surface charge density σ. The heat flux q is caused by the laser beam pulse focused on the channel’s boundary, whereas the normally directed electric field is due to electric double layers, that is naturally created within the liquid crystal near a charged surface. Calculations, based upon the nonlinear extension of the classical Ericksen-Leslie theory, with accounting the entropy balance equation, show that due to the coupling between the ∇T and ∇nˆ, in the HAN microfluidic channel the vortical flow v may be excited. The direction and magnitude of v is influenced by q and E0, as well as by the thickness of the HAN microfluidic channel.
Author Izabela Śliwa (WIiGE / KEM)
Izabela Śliwa,,
- Department of Mathematical Economics
, Alex V. Zakharov
Alex V. Zakharov,,
-
Journal seriesEuropean Physical Journal E, ISSN 1292-8941, e-ISSN 1292-895X, (N/A 40 pkt)
Issue year2020
Vol43
Pages1-12
Publication size in sheets0.55
Keywords in Polishciekłe kryształy, nemtyki
Keywords in Englishliquid crystls, nematics
ASJC Classification1304 Biophysics; 1305 Biotechnology; 1600 General Chemistry; 2500 General Materials Science; 3110 Surfaces and Interfaces
DOIDOI:10.1140/epje/i2020-11953-0
URL https://epje.epj.org/component/issues/
Languageen angielski
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 20-07-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.642; WoS Impact Factor: 2018 = 1.686 (2) - 2018=1.57 (5)
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