Dynamic Viscoelasticity of an ER Fluid in Oscillatory Slit Flow and its ER Micro-Structural Mechanism

Paper #:
  • 982894

Published:
  • 1998-11-09
Citation:
Vieira, S., Aizawa, R., and Nakano, M., "Dynamic Viscoelasticity of an ER Fluid in Oscillatory Slit Flow and its ER Micro-Structural Mechanism," SAE Technical Paper 982894, 1998, https://doi.org/10.4271/982894.
Pages:
13
Abstract:
An electrorheological fluid composed of sulfonated polymer particles in insulating oil is analyzed on nonlinear dynamic viscoelasticity in oscillatory slit flow. The viscoelastic properties are determined as a function of the electric field, the fluid strain amplitude and the oscillation frequency, and changes in the ER microstructure are studied by direct observation performed by an optical microscope. The results showed that the viscoelastic properties of the ER fluid remarkably depend on the electric field strength and on the strain amplitude. However, no dependence on the oscillation frequency was observed in the range of 2.5 to 6.9 Hz. These dependencies are explained based on the formation and deformation of ER particle clusters that span the electrodes under oscillatory slit flow. All the results are discussed in terms of pre-yield, yield and post-yield region.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2013-04-09
Training / Education
2013-04-09
Technical Paper / Journal Article
2010-04-12
Technical Paper / Journal Article
2011-04-12
Technical Paper / Journal Article
2010-09-28
Article
2017-03-13