Colloidal particle electrorotation in a nonuniform electric field
Abstract
A model to study the dynamics of colloidal particles in nonuniform electric fields is proposed. For an isolated sphere, the conditions and threshold for sustained (Quincke) rotation in a linear direct current (dc) field are determined. Particle dynamics becomes more complex with increasing electric field strength, changing from steady spinning around the particle center to time-dependent orbiting motion around the minimum field location. Pairs of particles exhibit intricate trajectories, which are a combination of translation, due to dielectrophoresis, and rotation, due to the Quincke effect. Our model provides a basis to study the collective dynamics of many particles in a general electric field.
- Publication:
-
Physical Review E
- Pub Date:
- January 2018
- DOI:
- 10.1103/PhysRevE.97.013111
- arXiv:
- arXiv:1711.01331
- Bibcode:
- 2018PhRvE..97a3111H
- Keywords:
-
- Physics - Fluid Dynamics;
- Condensed Matter - Soft Condensed Matter;
- 76Wxx;
- 70Fxx;
- 82C21
- E-Print:
- Phys. Rev. E 97, 013111 (2018)