Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Posters II

DY 29.20: Poster

Donnerstag, 29. März 2012, 17:00–19:00, Poster A

Characterizing anisotropic diffusion via distribution of generalized diffusivities — •Mario Heidernätsch and Günter Radons — Chemnitz University of Technology, D-09126 Chemnitz, Germany

Anisotropic diffusion is one possible generalization of the homogeneous diffusion process. It occurs typically in anisotropic media such as liquid crystals and can be formally described by a Fokker-Planck-equation using a diffusion tensor. In experiments single molecule tracking often is used to observe the local diffusion properties of a tracer in a liquid. Due to the experimental setup only a projection of the diffusion volume is observed, in other words a projected diffusion tensor. We now apply our distribution of generalized diffusivities [1] to this projected anisotropic diffusion and assess the properties of the underlying process. Our objective is in particular to discriminate between anisotropic and heterogeneous diffusion processes.

[1] M. Bauer et al., J. Chem. Phys. 135, 144118 (2011)