Thermal chain model of electro- and magnetorheology

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Steady shear 3-D simulations of electro- and magnetorheology in a uniaxial field are presented. These large scale simulations are three dimensional, and include the effect of Brownian motion. In the absence of thermal fluctuations, the expected shear thinning viscosity is observed in steady shear, and a striped phase is seen to rapidly form in a uniaxial field, with a shear slip zone in each sheet. However, as the influence of Brownian motion increases, the fluid stress decreases, especially at lower Mason numbers, and the striped phase eventually disappears, even when the fluid stress is still high. To account for the ... continued below

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32 p.

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MARTIN,JAMES E. April 6, 2000.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Steady shear 3-D simulations of electro- and magnetorheology in a uniaxial field are presented. These large scale simulations are three dimensional, and include the effect of Brownian motion. In the absence of thermal fluctuations, the expected shear thinning viscosity is observed in steady shear, and a striped phase is seen to rapidly form in a uniaxial field, with a shear slip zone in each sheet. However, as the influence of Brownian motion increases, the fluid stress decreases, especially at lower Mason numbers, and the striped phase eventually disappears, even when the fluid stress is still high. To account for the uniaxial steady shear data the author proposes a microscopic chain model of the role played by thermal fluctuations on the rheology of ER and MR fluids that delineates the regimes where an applied field can impact the fluid viscosity, and gives an analytical prediction for the thermal effect.

Physical Description

32 p.

Notes

OSTI as DE00753460

Medium: P; Size: 32 pages

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  • Journal Name: Physical Review E; Journal Volume: 63; Journal Issue: 1; Other Information: Submitted to Physical Review E

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  • Report No.: SAND2000-0857J
  • Grant Number: AC04-94AL85000
  • DOI: 10.1103/PhysRevE.63.011406 | External Link
  • Office of Scientific & Technical Information Report Number: 753460
  • Archival Resource Key: ark:/67531/metadc710131

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • April 6, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 12, 2017, 1:18 p.m.

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MARTIN,JAMES E. Thermal chain model of electro- and magnetorheology, article, April 6, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc710131/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.