Modeling the influence of noise and interaction strength on the collective motion of interactive particles
Department of Physics, University of Isfahan, 8174673441, Isfahan, Iran
Accepted: 27 October 2021
Published online: 6 November 2021
Collective behavior, a significant issue in examinations of complex systems, has been considered in many recent investigations. However, different aspects of environmental parameters and individuals' interactions on the dynamics of systems are not completely clear. In this study, distance-based Lennard–Jones interaction types are used to simulate individuals’ collective motion, in the presence of thermal noise. Moreover, the individuals’ dynamics are examined in homogeneous and inhomogeneous environments, considering geometric and motional order parameters. The results show that as the noise amplitude enhances, the collective motion of the particles is disturbed, and the system shifts to an incoherent phase, while increasing the interaction strength raises the system coherency. Furthermore, it is observed that in the presence of an external attractive force, such as the feeding region, the system coherency and order are increased considerably. Finally, it is found that the range of particles' interactions can affect the collective behavior and the phase transition of the system.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021