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

P5.2Wed 711:10-14:00Huge broadening of the crystal-fluid interface forsedimenting colloidsElshad Allakhyarov 11 HHU Dusseldorf, Universitaetstrasse 1, 40225, Dusseldorf, GermanyFor sedimenting colloidal hard spheres, the propagation and broadening of the crystal-fluid interfaceis studied by Brownian dynamics computer simulations of an initially homogeneous sample.Two different types of interface broadenings are observed: the first occurs during growth and iscorrelated with the interface velocity, the second is concomitant with the splitting of the crystalfluidinterface from the mass interface. The latter width is strongly peaked as a function of thegravitational driving strength with a huge amplitude relative to its equilibrium counterpart.2