Berlin 2005 – scientific programme

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DY: Dynamik und Statistische Physik

DY 14: Complex Fluids

DY 14.1: Talk

Friday, March 4, 2005, 15:30–15:45, TU H3010

Lattice-Boltzmann simulations of the self-organisation of amphiphilic mesophases and possible microfluidic applications — •Jens Harting — Instut für Computerphysik, Pfaffenwaldring 27, 79569 Stuttgart

The dynamical self-assembly of a particular amphiphilic mesophase, the gyroid, can be modelled using the lattice Boltzmann method. This mesophase forms from a homogeneous mixture, without any external constraints imposed to bring about the gyroid geometry, which is an emergent effect of the mesoscopic fluid parameters. We report on self-assembly and dynamics studies of gyroid mesophases, where our particular interest is on the formation and behaviour of defects in the system in order to understand their influence on the mesophases’ properties. Defects can be grain-boundary defects between gyroid domains, dislocations, line defects, or localised non-gyroid regions. Gyroid mesophases can be very stable and might thus be applicable as microfilters in very confined geometries. We will present results from simulations of the gyroid in microchannels.