Mesoscopic modelling of colloids in chiral nematics.
Faraday Discuss 144 (2010) 159-169
Abstract:
We present numerical modelling of colloidal particles in chiral nematics with cubic symmetry (blue phases) within the framework of the Landau-de Gennes free energy. The interaction potential of a single, nano-sized colloidal particle with a -1/2 disclination line is calculated as a generic trapping mechanism for particles within the cholesteric blue phases. The interaction potential is shown to be highly anisotropic and have threefold rotational symmetry. We discuss the equilibration of the colloidal texture with respect to particle positions and the unit cell size of the blue phase. We also describe how preservation of the liquid crystal volume and the number of particles allows blue phase colloidal structures with different unit cell sizes and configurations to be compared numerically.Swimmer-tracer scattering at low Reynolds number
SOFT MATTER 6:17 (2010) 4268-4276
Using electrowetting to control interface motion in patterned microchannels
SOFT MATTER 6:11 (2010) 2400-2402
Imbibition through an array of triangular聽posts.
J Phys Condens Matter 21:46 (2009) 464125
Abstract:
We present and interpret simulation results showing how a fluid moves on a hydrophilic substrate patterned by a square array of triangular posts. We demonstrate that the shape of the posts leads to anisotropic spreading, and discuss how this is influenced by the different ways in which the posts can pin the advancing front.Modelling capillary filling dynamics using lattice Boltzmann simulations
(2009)