Multipole corrections to dielectrophoretic force

Journal Article · Mon Jul 01 04:00:00 EDT 1985 · IEEE Trans. Ind. Appl.; (United States)

DOI:https://doi.org/10.1109/TIA.1985.349544· OSTI ID:6488083

Jones, T B

Calculation of the dielectrophoretic (DEP) force on a neutral dielectric particle in a nonuniform electric field is simplified by using the effective dipole method. Once the instantaneous effective dipole moment Peff(t) has been correctly identified using Gauss's law, then the expression Peff(t) . Eo(t) is used to determine the force on the particle. Recent work has demonstrated that the effective dipole method produces a result consistent with integration of the Maxwell stress tensor. In the present paper, the issues concerning identification of Peff(t) are aired, and an alternate derivation of the DEP force on a conducting dielectric sphere immersed in a conducting dielectric fluid is offered. Then the effective dipole theory is generalized to account for higher order (multipole) contributions. This new effective multipole theory is restricted to spherical particles in a cylindrically symmetric cusped electric field, but the analysis leads to straightforward computation of the quadrupolar correction factor for the DEP force. A quantitative example is provided.

• Research Organization: Xerox Corp., Webster, NY
• OSTI ID: 6488083
• Journal Information: IEEE Trans. Ind. Appl.; (United States), Journal Name: IEEE Trans. Ind. Appl.; (United States) Vol. IA-21:4; ISSN ITIAC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CORRECTIONS
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
DIPOLES
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
ELECTROPHORESIS
FLUIDS
MATERIALS
MULTIPOLES
PARTICLES
PHYSICAL PROPERTIES