DC‐electrokinetic motion of colloidal cylinder(s) in the vicinity of a conducting wall. Issue 12 (26th April 2022)

• Record Type: Journal Article
• Authors: Atay, Atakan; Beşkök, Ali; Çetin, Barbaros
• Other Names: Hayes Mark guestEditor.; Flanagan Lisa guestEditor.; Martinez‐Duarte Rodrigo guestEditor.
• Is Part Of: Electrophoresis. Volume 43:Issue 12(2022)
• Page Start: 1263
• Page End: 1274
• Publication Date: 2022-04-26
• Subjects: boundary element method -- colloidal cylinders -- colloidal forces -- dielectrophoresis -- electrophoresis; Electrophoresis -- Periodicals; Electrophoresis -- Periodicals; 541.372
• DOI: 10.1002/elps.202100266
• Languages: English
• ISSNs: 0173-0835

Abstract

Abstract: The boundary effects on DC‐electrokinetic behavior of colloidal cylinder(s) in the vicinity of a conducting wall is investigated through a computational model. The contribution of the hydrodynamic drag, gravity, electrokinetic (i.e., electrophoretic and dielectrophoretic), and colloidal forces (i.e., forces due to the electrical double layer and van der Waals interactions) are incorporated in the model. The contribution of electrokinetic and colloidal forces are included by introducing the resulting forces as an external force acting on the particle(s). The colloidal forces are implemented with the prescribed expressions from the literature, and the electrokinetic force is obtained by integrating the corresponding Maxwell stress tensor over the particles' surfaces. The electrokinetic slip‐velocity together with the thin electrical double layer assumption is applied on the surfaces. The position and velocity of the particles and the resulting electric and flow fields are obtained and the physical insight for the behavior of the colloidal cylinders are discussed in conjunction with the experimental observations in the literature.