Superdiffusion in dispersions of active colloids driven by an external field and their sedimentation equilibrium

NCUIR > Engineering College > Department of Chemical and Materials Engineering > journal & Dissertation > Item 987654321/101924

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101924

Title:	Superdiffusion in dispersions of active colloids driven by an external field and their sedimentation equilibrium
Authors:	曹恆光;Chen, Yen-Fu;Wei, Hsien-Hung;Sheng, Yu-Jane;Tsao, Heng-Kwong
Contributors:	工學院化學工程與材料工程學系
Date:	2016-04-25
Issue Date:	2026-04-21 14:51:12 (UTC+8)
Publisher:	American Physical Society;United States
Abstract:	摘要： The diffusive behaviors of active colloids with run-and-tumble movement are explored by dissipative particle dynamics simulations for self-propelled particles (force dipole) and external field-driven particles (point force). The self-diffusion of tracers (solvent) is investigated as well. The influences of the active force, run time, and concentration associated with active particles are studied. For the system of self-propelled particles, the normal diffusion is observed for both active particles and tracers. The diffusivity of the former is significantly greater than that of the latter. For the system of field-driven particles, the superdiffusion is seen for both active particles and tracers. In contrast, it is found that the anomalous diffusion exponent of the former is slightly less than that of the latter. The anomalous diffusion is caused by the many-body, long-range hydrodynamic interactions. In spite of the superdiffusion, the sedimentation equilibrium of field-driven particles can be acquired and the density profile is still exponentially decayed. The sedimentation length of field-driven particles is always greater than that of self-propelled particles. 其他題名： Phys Rev E 出版者： United States 出版日期： 2016-04 出處： Physical review. E, 2016-04, Vol.93 (4), p.042611, Article 042611 識別號： ISSN: 2470-0045 識別號： ISSN: 2470-0053 識別號： EISSN: 2470-0053 識別號： DOI: 10.1103/PhysRevE.93.042611 識別號： PMID: 27176356
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	17	View/Open

社群 sharing

Loading...