Julia Yeomans OBE FRS: Publications

Permeative flows in cholesterics: Shear and Poiseuille flows

JOURNAL OF CHEMICAL PHYSICS 124:20 (2006) ARTN 204906

Authors:

D Marenduzzo, E Orlandini, JM Yeomans

Rheology of cholesteric blue phases.

Phys Rev Lett 95:9 (2005) 097801

Authors:

A Dupuis, D Marenduzzo, E Orlandini, JM Yeomans

Abstract:

Cholesteric blue phases are a spectacular example of disclination line networks. Here we numerically investigate their response to an imposed Poiseuille flow. We show that shear forces bend and twist and can unzip the disclination lines. Under gentle forcing the network opposes the flow and the apparent viscosity is large. With increased forcing we find strong shear thinning corresponding to the disruption of the network. As the viscosity starts to drop, the imposed flow sets the network into motion. Disclinations break up and re-form with their neighbors along the flow.

Control of drop positioning using chemical patterning

(2005)

Authors:

A Dupuis, J Leopoldes, DG Bucknall, JM Yeomans

Switching hydrodynamics in multi-domain, twisted nematic, liquid crystal devices

(2005)

Authors:

D Marenduzzo, E Orlandini, JM Yeomans

Shear dynamics in cholesterics

COMPUT PHYS COMMUN 169:1-3 (2005) 122-125

Authors:

E Orlandini, D Marenduzzo, JM Yeomans

Abstract:

We study shear dynamic in cholesteric liquid crystal using a lattice Boltzmann scheme that solves the full, three-dimensional Beris-Edwards equations of hydrodynamics. We show that the coupling between shear and the natural elastic deformation of cholesterics can induce twist in an initially isotropic phase. (c) 2005 Elsevier B.V. All rights reserved.

51��