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Equality of the Kelvin and Korteweg–Helmholtz Force Densities Inside Dielectric Materials
- Source :
- IEEE Transactions on Magnetics. 56:1-4
- Publication Year :
- 2020
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2020.
-
Abstract
- The net force is enough to predict the motion of an object, but to predict its deformation, the distribution of the force inside the object should be known. In the continuum electromechanics, various expressions are used to calculate the electric forces acting on a dielectric object. The Kelvin and the Korteweg–Helmholtz forces are the most common electric body forces. The net force resulting from both of these “forces” is equal, but the distribution of these two forces inside a dielectric material is different because the expressions of both these forces lose their physical manifestation in the derivation process. This article is primarily aimed at revealing the common mistakes that are made when deriving volumetric force density. Then, the concept of an infinitesimal particle and external electric field is introduced. By using this concept, the electric force density inside a dielectric material is uniquely determined irrespective of the force expression, which is shown analytically and numerically.
- Subjects :
- 010302 applied physics
Body force
Physics
Continuum (measurement)
Force density
business.industry
Infinitesimal
Mechanics
Dielectric
01 natural sciences
Electronic, Optical and Magnetic Materials
symbols.namesake
Electric field
Helmholtz free energy
0103 physical sciences
symbols
Electrical and Electronic Engineering
business
Electromechanics
Subjects
Details
- ISSN :
- 19410069 and 00189464
- Volume :
- 56
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Magnetics
- Accession number :
- edsair.doi...........0d9eddd2064c32fb8c78ca48a5ca3658