Transient anomalous dispersion in random walkers |
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| Institution: | 1. Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran;2. Biotechnology Research Centre, School of Agriculture, Shiraz University, Shiraz, Iran;1. Faculty of Engineering, Hamedan Branch, Islamic Azad University, Hamedan, Iran;1. State Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, PR China;2. School of Engineering Science, University of Chinese Academy of Sciences, 100049 Beijing, PR China;3. Tianjin University of Science & Technology, Tianjin 300457, PR China;4. Dalian National Laboratory for Clean Energy, Dalian 116023, PR China;5. Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, PR China;6. Engineering, Faculty of Science, University of East Anglia, Norwich Research Park, NR4 7TJ, United Kingdom |
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| Abstract: | A simple model of dispersive tracers which display a transient anomalous regime is presented. It is based on an ensemble of random walkers belonging to two independent populations characterized by different Lagrangian decorrelation times. Apart from short-time ballistic and long-time diffusive behavior, the dispersion shows anomalous scaling at intermediate times over a wide range of variability for the free parameters of the model. |
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