Poiseuille flow of nematic liquid crystals via the full Ericksen-Leslie model

Abstract

In this paper, we study the Cauchy problem of the Poiseuille flow of full Ericksen-Leslie model for nematic liquid crystals. The model is a coupled system of a parabolic equation for the velocity and a quasilinear wave equation for the director. For a particular choice of several physical parameter values, we construct solutions with smooth initial data and finite energy that produce, in finite time, cusp singularities - blowups of gradients. The formation of cusp singularity is due to local interactions of wave-like characteristics of solutions, which is different from the mechanism of finite time singularity formations for the parabolic Ericksen-Leslie system. The finite time singularity formation for the physical model might raise some concerns for purposes of applications. This is, however, resolved satisfactorily; more precisely, we are able to establish the global existence of weak solutions that are Hölder continuous and have bounded energy. One major contribution of this paper is our identification of the effect of the flux density of the velocity on the director and the reveal of a singularity cancellation - the flux density remains uniformly bounded while its two components approach infinity at formations of cusp singularities.

45 pages

References in corpus (9)

• The Kolmogorov-Riesz compactness theorem
• Recent developments of analysis for hydrodynamic flow of nematic liquid crystals
• Regularity and existence of global solutions to the Ericksen-Leslie system in ${\mathbb{R}}^2$
• Well-posedness of the Ericksen-Leslie system
• Global Conservative Solutions to a Nonlinear Variational Wave Equation
• Finite time singularity of the nematic liquid crystal flow in dimension three
• Unique Conservative Solutions to a Variational Wave Equation
• On well-posedness of Ericksen-Leslie's hyperbolic incompressible liquid crystal model
• On well-posedness of Ericksen-Leslie's paraboloc-hyperbolic liquid crystal model