Transport of active Brownian particles in non-uniform cross channel networks

Journal of Lanzhou University of Technology ›› 2025, Vol. 51 ›› Issue (4): 166-172.

• Scientific • Previous Articles

Transport of active Brownian particles in non-uniform cross channel networks

ZHANG Ya-xi¹, ZHANG Peng-juan¹, ZHAO Guang-kuo¹, HAO Rui¹, WANG Peng^1,2, WANG Xu-ming^1,3

1. School of Physics, Ningxia University, Yinchuan 750021, China;
2. Frontier Crossing College, Ningxia University, Zhongwei 755000, China;
3. Ningxia Key Laboratory of Intelligent Sensing for Desert Information, Yinchuan 750021, China

Received:2024-03-13 Online:2025-08-28 Published:2025-09-05

Abstract

Abstract: Focuses on the special structure of complex biological media such as tumor microenvironment and the transport characteristics of active Brownian particles in it, the microenvironment is abstracted as an asymmetric “cross” channel network. A stochastic dynamic model is established, dominated by a cubic potential field, periodic driving, environmental drag forces, and non-uniform channel obstruction. The random walk of particles on asymmetric channels is further analyzed. The simulation results demonstrate the characteristics of particle transport in a sub-diffusion manner, directional transport oscillating with time, and absolute negative current of the particles moving against the direction of the potential field force. Dynamics and correlation analyses are conducted to reveal the relevant mechanisms.

Key words: complex biological media, cross channel network, active Brownian particle, non-equilibrium transport

CLC Number:

O414

ZHANG Ya-xi, ZHANG Peng-juan, ZHAO Guang-kuo, HAO Rui, WANG Peng, WANG Xu-ming. Transport of active Brownian particles in non-uniform cross channel networks[J]. Journal of Lanzhou University of Technology, 2025, 51(4): 166-172.

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Transport of active Brownian particles in non-uniform cross channel networks

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