8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

Wed 711:10-14:00P5.123Driven crystallization under flowErdal Celal Oguz, 1 Rene Messina, 1 Hartmut Löwen, 1 Alexander Reinmüller, 2Hans Joachim Schöpe, 2 and Thomas Palberg 21 Heinrich Heine Universität Düsseldorf, Theoretische Physik II: Weiche Materie,Universitätsstr. 1, Geb. 25. 32. O2. 56, 40225, Düsseldorf, Germany2 Johannes-Gutenberg-Universität, Mainz, GermanyA combination of Brownian dynamics computer simulations, theory and real space experimentsis performed to study the nucleation process of charged colloidal suspensions in two dimensions.The particles are exposed to a long-ranged trap which is produced by an external flow field. Theconstitutive particles are governed by the Yukawa pair interaction, whereas their dynamics obeyBrownian motion. The nucleation process is driven by a radial flow field, which is inversely proportionalto the distance to the center. For the parameters under consideration, crystallization in atriangular lattice occurs around the center. Grain boundaries between crystallites and an interfacebetween crystalline and fluid phases are also found. Theoretical predictions are proposed to characterizethe interface propagation. Thereby a good agreement is achieved with simulational andexperimental results.123