Langevin model for a Brownian system with directed motion

5th International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Ambía, Francisco^1 ; Híjar, Humberto^1

Grupo de Sistemas Inteligentes, Facultad de Ingeniería, Universidad la Salle, Benjamín Franklin 47, Ciudad de México

06140, Mexico^1

关键词: Brownian dynamics simulations;    Brownian systems;    Center of mass;    Constant speed;    Elastic potential;    Langevin models;    Spherical particle;    Time dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/738/1/012037/pdf
DOI  :  10.1088/1742-6596/738/1/012037

来源: IOP

【 摘 要 】

We propose a model for an active Brownian system that exhibits one-dimensional directed motion. This system consists of two Brownian spherical particles that interact through an elastic potential and have time-dependent radii. We suggest an algorithm by which the sizes of the particles can be varied, such that the center of mass of the system is able to move at an average constant speed in one direction. The dynamics of the system is studied theoretically using a Langevin model, as well as from Brownian Dynamics simulations.