Active Brownian particles moving in a random Lorentz gas
Active Brownian particles moving in a random Lorentz gas
复制标题
活性布朗粒子在随机洛伦兹气体中运动
DOI:
10.1140/epje/i2017-11510-0
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
H. Stark
中科院分区:
文献类型:
--
作者:
M. Zeitz;K. Wolff;H. Stark
AbstractBiological microswimmers often inhabit a porous or crowded environment such as soil. In order to understand how such a complex environment influences their spreading, we numerically study non-interacting active Brownian particles (ABPs) in a two-dimensional random Lorentz gas. Close to the percolation transition in the Lorentz gas, they perform the same subdiffusive motion as ballistic and diffusive particles. However, due to their persistent motion they reach their long-time dynamics faster than passive particles and also show superdiffusive motion at intermediate times. While above the critical obstacle densitythe ABPs are trapped, their long-time diffusion belowis strongly influenced by the propulsion speed v0. With increasing v0, ABPs are stuck at the obstacles for longer times. Thus, for large propulsion speed, the long-time diffusion constant decreases more strongly in a denser obstacle environment than for passive particles. This agrees with the behavior of an effective swimming velocity and persistence time, which we extract from the velocity autocorrelation function.Graphical abstract
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影响因子:
2.7
作者:
Downton, Matthew T.;Stark, Holger
通讯作者:
Stark, Holger
影响因子:
2.4
作者:
Adhyapak, Tapan Chandra;Stark, Holger
通讯作者:
Stark, Holger
影响因子:
4.6
作者:
Khatami M;Wolff K;Pohl O;Ejtehadi MR;Stark H
通讯作者:
Stark H
DOI:
10.1088/0953-8984/28/25/253001
发表时间:
2016-01
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
A. Zöttl;H. Stark
通讯作者:
A. Zöttl;H. Stark
DOI:
--
发表时间:
1968
期刊:
影响因子:
--
作者:
A. Weijland;J. V. Leeuwen
通讯作者:
J. V. Leeuwen