One-dimensional Analysis Of A Continuum Model For Structure In Electrorheological Fluids
Author(s)
K. von Pfeil, M.D. Graham, D.J. Klingenberg & J.F. Morris
Abstract
One-dimensional analysis of a continuum model
for structure in electrorheological fluids
K. von ~ f e i l ' , M.D. ~raham', D.J. IClingenbergl & J.F. Morris2
1 Department of Chemical Engineering, University of Wisconsin, USA
2 Halliburton Energy Services, USA
Abstract
A continuum model is used to describe the evolution of nonuniform particle concentration
distributions in electrorheological and magnetorheological fluids. Particles
are shown to migrate relative to the bulk mixture motion as the result of the
particle-phase contribution to the suspension stress. The particle stress results from
both electrostatic and hydrodynamic contributions; the ratio of hydrodynamic to
electrostatic stress is characterized by the Mason number, Mn. The model predicts
structures which are in agreement with those observed experimentally for both
unsheared and sheared conditions. The emphasis here is on the sheared condition,
where particle-rich stripes with normal along the vorticity direction of a simple
shear
Keywords
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