HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

Brownian motion in shear flow : Direct observation of anomalous diffusion

Files in This Item:
PRE84-6_061120.pdf600.44 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Brownian motion in shear flow : Direct observation of anomalous diffusion
Authors: Orihara, Hiroshi Browse this author →KAKEN DB
Takikawa, Yoshinori Browse this author
Keywords: Brownian motion
Issue Date: Dec-2011
Publisher: American Physical Society
Journal Title: Physical Review E
Volume: 84
Issue: 6
Start Page: 061120
Publisher DOI: 10.1103/PhysRevE.84.061120
PMID: 22304053
Abstract: Brownian motion in a simple shear flow has been experimentally investigated by using a different method for observation and analysis. A number of polystyrene spheres dispersed in sheared water were tracked with a confocal scanning laser microscope, and the time dependences of their coordinates were obtained. Since in the usual mean-square displacement in the flow direction the contribution from the Brownian motion is overwhelmed by that due to the convection, we considered an alternative displacement for which the convection effect could be removed. We found that the new mean-square displacement consists of the normal Einstein diffusion term, which is linear in t, and an anomalous t3 term arising from the coupling between the diffusion along the velocity gradient and the convection.
Rights: ©2011 American Physical Society
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 折原 宏

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University