ADRIANA ISVORAN*, E. VILASECA**, ***, LAURA UNIPAN****, J.L. GARCÉS*****, F. MAS**, ***
*Department of Chemistry, University of the West Timişoara, 16, Pestallozi, 300115 Timişoara, Romania, e-mail: aisvoran@yahoo.com
**Theoretical Chemistry Research Centre (CeRQT) of Scientific Park of Barcelona (PCB), Barcelona, Spain
***Physical Chemistry Department, Barcelona University (UB), Barcelona, Spain
****Department of Agriculture, University of Agricultural Sciences of Banat, 119, Calea Aradului, 300645 Timişoara, Romania
*****Chemistry Department, Lleida University (UdL), Lleida, Spain
Abstract. This paper focuses on Monte Carlo simulations of single-particle diffusion in two-dimensional (2D) and three-dimensional (3D) media with obstacles distributed randomly and, respective, uniformly. The simulation data show anomalous diffusion for short times and normal diffusion for long times and they suggest that the uniform distribution of obstacles facilitates diffusion in comparison to their random distribution. The simulation results also reveal that, for the same dimensionality of the media, anomalous diffusion increases, as the average space between obstacles decreases and it is always much less anomalous in 3D crowded media than in 2D ones.
Key words: diffusion, crowded media, Monte Carlo simulations.
Corresponding author’s e-mail: aisvoran@yahoo.com
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