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- W4280551410 abstract "We propose a practical empirical fitting function to characterize the non-Gaussian displacement distribution functions (DispD) often observed for heterogeneous diffusion problems. We first test this fitting function with the problem of a colloidal particle diffusing between two walls using Langevin Dynamics (LD) simulations of a raspberry particle coupled to a lattice Boltzmann (LB) fluid. We also test the function with a simple model of anomalous diffusion on a square lattice with obstacles. In both cases, the fitting parameters provide more physical information than just the Kurtosis (which is often the method used to quantify the degree of anomaly of the dynamics), including a length scale that marks where the tails of the DispD begin. In all cases, the fitting parameters smoothly converge to Gaussian values as the systems become less anomalous." @default.
- W4280551410 created "2022-05-22" @default.
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- W4280551410 date "2022-10-01" @default.
- W4280551410 modified "2023-10-01" @default.
- W4280551410 title "An empirical method to characterize displacement distribution functions for anomalous and transient diffusion" @default.
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- W4280551410 doi "https://doi.org/10.1016/j.physa.2022.127676" @default.
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