Structure evolution in electrorheological fluids flowing through microchannels
Name
Hosoi_DEP Structure evolution.pdf
Size
2.86 MB
Format
Adobe PDF
Checksum (MD5)
173b08bcd50b092c2b0887761a6e62cc
Author(s)
Qian, Bian
Hosoi, Anette E.
McKinley, Gareth H
Date Issued
January 2013
Journal
Soft Matter
Publisher
Royal Society of Chemistry
Citation
Qian, Bian, Gareth H. McKinley, and A. E. Hosoi. “Structure Evolution in Electrorheological Fluids Flowing through Microchannels.” Soft Matter 9, no. 10 (2013): 2889.
Version
Original manuscript
Abstract
Enhanced knowledge of the transient behavior and characteristics of electrorheological (ER) fluids subject to time dependent electric fields offers the potential to advance the design of fast actuated hydraulic devices. In this study, the dynamic response of electrorheological fluid flows in rectilinear microchannels was investigated experimentally. Using high-speed microscopic imaging, the evolution of particle aggregates in ER fluids subjected to temporally stepwise electric fields was visualized. Nonuniform growth of the particle structures in the channel was observed and correlated to field strength and flow rate. Two competing time scales for structure growth were identified. Guided by experimental observations, we developed a phenomenological model to quantitatively describe and predict the evolution of microscale structures and the concomitant induced pressure gradient.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Hatsopoulos Microfluids Laboratory
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1039/c2sm27022f
