Static problems involving a conducting sphere with radial anisotropy (radial and tangential conductivity, denoted α and η are considered. The internal and external fields and the dipole moment are derived for a radially anisotropic sphere, and a condition relating α, η and the external isotropic conductivity α0 is given, for which the dipole moment vanishes, implying that the sphere becomes transparent in an homogeneous current flow. Also, problems involving external and internal point sources of current are examined, and simple interpretations in terms of image sources are presented for cases where α/spl Gt/η and α/spl ap/η. Image expressions for radial and tangential dipole sources are elaborated.
|Journal||IEEE Transactions on Dielectrics and Electrical Insulation|
|Publication status||Published - 1995|
|MoE publication type||A1 Journal article-refereed|