论文标题
圆在随机环境中的随机运动
Random motion of a circle microswimmer in a random environment
论文作者
论文摘要
我们模拟单个圆微作用的动力学，以探索无序的固定障碍物。研究了两种不同类型的随机性，淬火障碍和随机噪声的相互作用，以揭示它们对运输特性的影响。我们计算等同率的线，这是旋转扩散系数和障碍物密度的函数。我们发现，增加的噪声或混乱倾向于扩大扩散，但对于巨大的随机性，竞争会导致对运输的强烈抑制。我们通过将自由运动的相关时间尺度与与障碍物碰撞之间的平均周期进行比较，使运输的抑制和扩增合理化。
We simulate the dynamics of a single circle microswimmer exploring a disordered array of fixed obstacles. The interplay of two different types of randomness, quenched disorder and stochastic noise, is investigated to unravel their impact on the transport properties. We compute lines of isodiffusivity as a function of the rotational diffusion coefficient and the obstacle density. We find that increasing noise or disorder tends to amplify diffusion, yet for large randomness the competition leads to a strong suppression of transport. We rationalize both the suppression and amplification of transport by comparing the relevant time scales of the free motion to the mean period between collisions with obstacles.
