Electrorheological responses of particulate suspensions and emulsions in a small-strain dynamic shear flow: Viscoelasticity and yielding phenomena

The dynamic rheological behavior of multiphase electrorheological (ER) fluids was considered, as continuation of a previous paper [Chin and Park, 2000]. Oil-in-oil emulsions, which differ in electrical conductivity and dielectric constant, were employed for an ER-active emulsion and also for a multiphase ER fluid with enhanced performance. The polyaniline particle suspension in an electric field showed viscoelastic behavior within a very limited range of strain amplitude, indicating the transition from viscoelasticity to viscoplasticity. Within the region of viscoelasticity, the linear region was restricted below the amplitude of 0.1%, whereas the ER-active emulsions showed a rather wide linear regime. Frequency dependence of the storage shear modulus in the linear viscoelastic region revealed the typical features of an elastic solid. When the fraction of emulsion drops (Phi) in multiphase ER fluids increased, the limiting strain for viscoelasticity showed a higher value.
Publisher
KOREAN INST CHEM ENGINEERS
Issue Date
2001-01
Language
ENG
Keywords

FLUIDS; STRENGTH; BEHAVIOR; FIELD

Citation

KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.18, no.1, pp.54 - 60

ISSN
0256-1115
URI
http://hdl.handle.net/10203/5143
Appears in Collection
CBE-Journal Papers(저널논문)
  • Hit : 380
  • Download : 17
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button
⊙ Cited 6 items in WoSClick to see citing articles inrecords_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0