Nematic molecules confined in an asymmetric π cell and subjected to strong electric fields exhibit texturaldistortions involving nematic order variations, described by the Landau-de Gennes Q-tensor theory. Weinvestigated the evolution of order variations as function of the applied electric pulse amplitude and of thenematic surface pretilt anchoring angles by implementing a Q-tensor model with a moving mesh finite elementmethod. The proposed technique is able to clearly distinguish the bulk and the surface order reconstruction whichoccur in the cell.

Surface and bulk contributions to nematic order reconstruction

AMODDEO, Antonino
;
2012

Abstract

Nematic molecules confined in an asymmetric π cell and subjected to strong electric fields exhibit texturaldistortions involving nematic order variations, described by the Landau-de Gennes Q-tensor theory. Weinvestigated the evolution of order variations as function of the applied electric pulse amplitude and of thenematic surface pretilt anchoring angles by implementing a Q-tensor model with a moving mesh finite elementmethod. The proposed technique is able to clearly distinguish the bulk and the surface order reconstruction whichoccur in the cell.
nematic liquid crystals, order reconstruction, MMPDE, FEM
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12318/6521
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