Modelling unidirectional liquid spreading on slanted microposts
Soft Matter 9:29 (2013) 6862-6866
Abstract:
A lattice Boltzmann algorithm is used to simulate the slow spreading of drops on a surface patterned with slanted micro-posts. Gibb's pinning of the interface on the sides or top of the posts leads to unidirectional spreading over a wide range of contact angles and inclination angles of the posts. Regimes for spreading in no, one or two directions are identified, and shown to agree well with a two-dimensional theory proposed in Chu, Xiao and Wang. A more detailed numerical analysis of the contact line shapes allows us to understand deviations from the two dimensional model, and to identify the shapes of the pinned interfaces. 漏 2013 The Royal Society of Chemistry.Fluid mixing by curved trajectories of microswimmers
(2013)
Enhanced motility of a microswimmer in rigid and elastic confinement
(2013)
Velocity Correlations in an Active Nematic
ArXiv 1302.6732 (2013)
Abstract:
The flow properties of a continuum model for an active nematic is studied and compared with recent experiments on suspensions of microtubule bundles and molecular motors. The velocity correlation length is found to be independent of the strength of the activity while the characteristic velocity scale increases monotonically as the activity is increased, both in agreement with the experimental observations. We interpret our results in terms of the creation and annihilation dynamics of a gas of topological defects.Velocity Correlations in an Active Nematic
(2013)