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Dynamics of a rigid rod in a disordered medium with long-range spatial correlation
M Ebrahim Foulaadvand1, Mahdiyeh Sadrara2
1Department of Physics, University of Zanjan, P.O. Box 45196-313, Zanjan, Iran and School of Nano-science, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, Iran.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 14, 2015
Summary
We studied how rod-like objects move in a 2D disordered environment with correlated forces. Long-range correlations in force points lead to anomalous diffusion of the rod
Area of Science:
- Physics
- Materials Science
- Statistical Mechanics
Background:
- Understanding particle diffusion in disordered media is crucial for various scientific fields.
- Previous studies often assumed homogeneous force distributions, limiting applicability to complex environments.
Purpose of the Study:
- To investigate the anomalous diffusion of a rigid rod-like object in a 2D disordered host medium.
- To analyze the impact of long-range spatial correlation in force points on transport characteristics.
Main Methods:
- Simulated diffusion of a rod-like object interacting with static, repulsive point-like force sources.
- Varied degrees of long-range spatial correlation and rod lengths.
- Calculated center-of-mass and rotational mean-squared displacements over time.
Main Results:
- Demonstrated that long-range spatial correlations among force points induce anomalous diffusion.
- Observed changes in transport characteristics compared to homogeneous force distributions.
- Quantified the time dependence of mean-squared displacements for different correlation strengths and rod lengths.
Conclusions:
- The presence of long-range correlations in the force field significantly alters diffusion dynamics.
- Anomalous diffusion is a key characteristic of rod-like object transport in correlated disordered media.
- Findings provide insights into transport phenomena in complex, non-uniform environments.
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