Observations of the near‐wall accumulation of suspended particles due to shear and electroosmotic flow in opposite directions

• Published in: Electrophoresis Vol. 42; no. 21-22; pp. 2215 - 2222
• Main Authors: Yee, Andrew J., Yoda, Minami
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 01.11.2021
• Subjects: Accumulation; Banded structure; Counterflow; electric field; Electric fields; Electroosmosis; electrophoresis; Fluid dynamics; Fluid flow; fluorescent dyes; Lift forces; Particle assembly; Particle electrophoresis; Particle manipulation; Reynolds number; Shear flow; Suspensions; Tracer particles; Particle assembly; Lift forces; Particle electrophoresis; Particle manipulation
• ISSN: 0173-0835; 1522-2683; 1522-2683
• DOI: 10.1002/elps.202100151

On the basis of previous studies, the particles in a dilute (volume fractions φ∞ < 4 × 10–3) suspension in combined Poiseuille and electroosmotic “counterflow” at flow Reynolds numbers Re ≤ 1 accumulate, then assemble into structures called “bands,” within ∼6 μm of the channel wall. The experimen...