Mathematical problems of nematic liquid crystals: between dynamical and stationary problems

A Zarnescu - … Transactions of the Royal Society A, 2021 - royalsocietypublishing.org
Mathematical studies of nematic liquid crystals address in general two rather different
perspectives: that of fluid mechanics and that of calculus of variations. The former focuses on …

Orientational order on surfaces: The coupling of topology, geometry, and dynamics

M Nestler, I Nitschke, S Praetorius, A Voigt - Journal of Nonlinear Science, 2018 - Springer
We consider the numerical investigation of surface bound orientational order using unit
tangential vector fields by means of a gradient flow equation of a weak surface Frank–Oseen …

Nematic liquid crystals on curved surfaces: a thin film limit

I Nitschke, M Nestler, S Praetorius… - Proceedings of the …, 2018 - royalsocietypublishing.org
We consider a thin film limit of a Landau–de Gennes Q-tensor model. In the limiting process,
we observe a continuous transition where the normal and tangential parts of the Q-tensor …

Global Strong Solutions of the Full Navier--Stokes and -Tensor System for Nematic Liquid Crystal Flows in Two Dimensions

C Cavaterra, E Rocca, H Wu, X Xu - SIAM Journal on Mathematical Analysis, 2016 - SIAM
We consider a full Navier--Stokes and Q-tensor system for incompressible liquid crystal
flows of nematic type. In the two dimensional periodic case, we prove the existence and …

Dynamics and flow effects in the Beris-Edwards system modeling nematic liquid crystals

H Wu, X Xu, A Zarnescu - Archive for Rational Mechanics and Analysis, 2019 - Springer
Abstract We consider the Beris-Edwards system modelling incompressible liquid crystal
flows of nematic type. This couples a Navier-Stokes system for the fluid velocity with a …

Discontinuous order parameters in liquid crystal theories

JM Ball, SJ Bedford - Molecular Crystals and Liquid Crystals, 2015 - Taylor & Francis
The paper is concerned with various issues surrounding the mathematical description of
defects in models of liquid crystals, drawing on experience from solid mechanics. The roles …

Liquid crystal defects in the Landau–de Gennes theory in two dimensions—beyond the one-constant approximation

G Kitavtsev, JM Robbins, V Slastikov… - … Models and Methods in …, 2016 - World Scientific
We consider the two-dimensional (2D) Landau–de Gennes energy with several elastic
constants, subject to general k-radially symmetric boundary conditions. We show that for …

Convergence analysis of a fully discrete energy-stable numerical scheme for the Q-tensor flow of liquid crystals

VM Gudibanda, F Weber, Y Yue - SIAM Journal on Numerical Analysis, 2022 - SIAM
We present a fully discrete convergent finite difference scheme for the Q-tensor flow of liquid
crystals based on the energy-stable semidiscrete scheme by Zhao et al.[Comput. Methods …

A novel Landau-de Gennes model with quartic elastic terms

D Golovaty, M Novack, P Sternberg - European Journal of Applied …, 2021 - cambridge.org
Within the framework of the generalised Landau-de Gennes theory, we identify a Q-tensor-
based energy that reduces to the four-constant Oseen–Frank energy when it is considered …

A stable scheme and its convergence analysis for a 2D dynamic -tensor model of nematic liquid crystals

Y Cai, J Shen, X Xu - Mathematical Models and Methods in Applied …, 2017 - World Scientific
We propose an unconditionally stable numerical scheme for a 2D dynamic Q-tensor model
of nematic liquid crystals. This dynamic Q-tensor model is an L 2-gradient flow generated by …