Nonmechanical principle for producing a flow in a homogeneously aligned microfluidic nematic channel
Izabela Śliwa , Alex V. Zakharov
AbstractNonmechanical 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.
|Journal series||European Physical Journal E, ISSN 1292-8941, e-ISSN 1292-895X, (N/A 40 pkt)|
|Publication size in sheets||0.55|
|Keywords in Polish||ciekłe kryształy, nemtyki|
|Keywords in English||liquid crystls, nematics|
|ASJC Classification||; ; ; ;|
|Score||= 40.0, 04-07-2020, ArticleFromJournal|
|Publication indicators||: 2018 = 0.642; : 2018 = 1.686 (2) - 2018=1.57 (5)|
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