Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 9: Dynamics in many-body systems: Equilibration and localization II (joint session DY/TT)

DY 9.5: Vortrag

Montag, 1. April 2019, 16:30–16:45, H19

Effect of anisotropic diffusion on spinodal decomposition — •Abhinav Sharma1, Hidde Vuijk1, and Joseph Brader21Leibniz 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.

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