SKIN EFFECT FROM EXTENDED IRREVERSIBLE THERMODYNAMICS PERSPECTIVE

Autor(es)

Silveira, F. E. M. ^[1] ; Lima, J. A. S. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Sao Paulo - Brazil

^[2] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS; v. 24, n. 2-3, p. 151-160, 2010.
• Citações Web of Science: 13

Resumo

The skin effect is rediscussed from the point of view of extended irreversible thermodynamics. Within that framework, the current density. owing in a good conductor is assumed to relax in a finite time tau. For the whole frequency range, it is found that the skin effect is characterized by two length scales: the penetration depth delta and an oscillation scale xi. Accordingly, it is also shown that the skin effect exhibits two sharply distinct regimes: damped oscillation and pure attenuation in space. A transition frequency between those regimes is determined by omega(t) = 1/tau root 3, thus leading to the possibility of measuring tau. In the high frequency regime, the penetration depth, as well as other related quantities, all acquire finite saturated values, which do not depend on the wave frequency and are determined by tau only. Experimental veri. cation of the results presented here may be relevant in several branches of applied physics and engineering. (AU)

• Processo FAPESP: 04/13668-0 - Cosmologia na era da precisão: energia escura, matéria escura e radiação cósmica de fundo
• Beneficiário: Jose Ademir Sales de Lima
• Modalidade de apoio: Auxílio à Pesquisa - Temático