Rheological Properties and Stability of Magnetorheological Fluids using Viscoelastic Medium and Nanoadditives

Jong Hyeok Park, Moo Hyun Kwon, O. Ok Park

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

In order to improve the stability of magnetorheological (MR) fluids, viscoelastic medium having 2.2 Pa yield stress has been used as a continuous phase and nanosized CrO2 particles are added too. The rheological properties as well as the dispersion stability of MR fluids have been studied by using a stress-controlled rheometer and sedimentation test. The steady-shear MR response was independent of the continuous and nano additives and the field-induced yield stress increased subquadratically with the flux density. Since the constant stress is generated within the limit of zero shear rate, the plateau in the flow curve corresponds to the Bingham yield stress. Under an external field, the yield stress varied as B3/2. The yield stress has an approximately linear relation with the particle volume fraction.

Original languageEnglish
Pages (from-to)580-585
Number of pages6
JournalKorean Journal of Chemical Engineering
Volume18
Issue number5
DOIs
Publication statusPublished - 2001 Jan 1

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Magnetorheological fluids
Yield stress
Rheometers
Sedimentation
Shear deformation
Volume fraction
Fluxes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "Rheological Properties and Stability of Magnetorheological Fluids using Viscoelastic Medium and Nanoadditives",
abstract = "In order to improve the stability of magnetorheological (MR) fluids, viscoelastic medium having 2.2 Pa yield stress has been used as a continuous phase and nanosized CrO2 particles are added too. The rheological properties as well as the dispersion stability of MR fluids have been studied by using a stress-controlled rheometer and sedimentation test. The steady-shear MR response was independent of the continuous and nano additives and the field-induced yield stress increased subquadratically with the flux density. Since the constant stress is generated within the limit of zero shear rate, the plateau in the flow curve corresponds to the Bingham yield stress. Under an external field, the yield stress varied as B3/2. The yield stress has an approximately linear relation with the particle volume fraction.",
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Rheological Properties and Stability of Magnetorheological Fluids using Viscoelastic Medium and Nanoadditives. / Park, Jong Hyeok; Kwon, Moo Hyun; Park, O. Ok.

In: Korean Journal of Chemical Engineering, Vol. 18, No. 5, 01.01.2001, p. 580-585.

Research output: Contribution to journalArticle

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