TY - JOUR
T1 - Coupling electrokinetics and rheology
T2 - Electrophoresis in non-Newtonian fluids
AU - Khair, Aditya S.
AU - Posluszny, Denise E.
AU - Walker, Lynn M.
PY - 2012/1/25
Y1 - 2012/1/25
N2 - We present a theoretical scheme to calculate the electrophoretic motion of charged colloidal particles immersed in complex (non-Newtonian) fluids possessing shear-rate-dependent viscosities. We demonstrate that this non-Newtonian rheology leads to an explicit shape and size dependence of the electrophoretic velocity of a uniformly charged particle in the thin-Debye-layer regime, in contrast to electrophoresis in Newtonian fluids. This dependence is caused by non-Newtonian stresses in the bulk (electroneutral) fluid outside the Debye layer, whose magnitude is naturally characterized in an electrophoretic Deborah number.
AB - We present a theoretical scheme to calculate the electrophoretic motion of charged colloidal particles immersed in complex (non-Newtonian) fluids possessing shear-rate-dependent viscosities. We demonstrate that this non-Newtonian rheology leads to an explicit shape and size dependence of the electrophoretic velocity of a uniformly charged particle in the thin-Debye-layer regime, in contrast to electrophoresis in Newtonian fluids. This dependence is caused by non-Newtonian stresses in the bulk (electroneutral) fluid outside the Debye layer, whose magnitude is naturally characterized in an electrophoretic Deborah number.
UR - https://www.scopus.com/pages/publications/84856668742
UR - https://www.scopus.com/inward/citedby.url?scp=84856668742&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.85.016320
DO - 10.1103/PhysRevE.85.016320
M3 - Article
AN - SCOPUS:84856668742
SN - 1539-3755
VL - 85
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 1
M1 - 016320
ER -