Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 20: Dynamics in many-body systems: Equilibration and localization II (joint session DY/TT)
TT 20.5: Vortrag
Montag, 1. April 2019, 16:30–16:45, H19
Effect of anisotropic diffusion on spinodal decomposition — •Abhinav Sharma1, Hidde Vuijk1, and Joseph Brader2 — 1Leibniz Institute for polymer research, Dresden, Germany — 2University of Fribourg, Fribourg, Switzerland
We study the phase transition dynamics of a fluid system in which the particles diffuse anisotropically in space. The motivation to study such a situation is provided by systems of interacting magnetic colloidal particles subject to the Lorentz force. The Smoluchowski equation for the many-particle probability distribution then acquires an anisotropic diffusion tensor. Using the method of dynamical density functional theory we predict that the intermediate-stage decomposition dynamics can be slowed down significantly by anisotropy; the coupling between different Fourier-modes is strongly reduced. Numerical calculations are performed for a model (Yukawa) fluid that exhibits gas-liquid phase separation.