DC‐electrokinetic motion of colloidal cylinder(s) in the vicinity of a conducting wall

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....

Full description

Saved in:
Bibliographic Details
Published in:Electrophoresis 2022-06, Vol.43 (12), p.1263-1274
Main Authors: Atay, Atakan, Beşkök, Ali, Çetin, Barbaros
Format: Article
Language:English
Subjects:
boundary element method
colloidal cylinders
colloidal forces
Colloids
Cylinders
Dielectrophoresis
Electric double layer
Electrokinetics
electrophoresis
Tensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0173-0835
1522-2683
DOI:10.1002/elps.202100266