2001/07/31 by Jiping Huang, J. P. Huang, K. W. Yu +1 · 3 citations
Chemistry · Engineering · Physics and Astronomy · #Electrical and Bioimpedance Tomography #Electrostatics and Colloid Interactions #Microfluidic and Bio-sensing Technologies #cond-mat.soft #physics.bio-ph
paper · pdf · doi:10.1103/physreve.65.021401
published as Phys. Rev. E 65, 021401 (2002) · Minor revisions; accepted by Phys. Rev. E
arxiv created 2001/10/24 · openalex publication_date 2002/01/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a theoretical study of electrorotation (ER) of two spherical particles under the action of a rotating electric field. When the two particles approach and finally touch, the mutual polarization interaction between the particles leads to a change in the dipole moment of the individual particle and hence the ER spectrum, as compared to that of the well-separated particles. The mutual polarization effects are captured by the method of multiple images. From the theoretical analysis, we find that the mutual polarization effects can change the characteristic frequency at which the maximum angular velocity of electrorotation occurs. The numerical results can be understood in the spectral representation theory.