Sommario
Si considera un corpo rigido in quiete, conduttore di calore, immerso in un campo elettromagnetico esterno. Nell'ambito della teoria termodinamica proposta da I. Müller [1] si mettono in evidenza alcune proprietà del modello proposto che può essere scritto sotto forma simmetrica e conservativa assicurando, così, la buona posizione del problema di Cauchy.
Summary
We consider a rigid heat conductor at rest immersed in an electromagnetic field. The interactions between thermodynamic and electromagnetic fields are decribed, in the frame work of the theory proposed by I. Müller [1]. Some properties related to the model equations proposed are pointed out. Specifically we are able to show as the governing equations may be written in symmetric and conservative form so that the Cauchy problem results well posed.
References
Müller, I.,The coldness, an universal function in thermoelastic bodies, Arch. Rat. Mech. Analysis, 41, 1971, pp. 319–332.
Hutter K.,The fundations of thermodynamics, its basic postulates and implications. A review of modern thermodynamics Acta. Mech., 27, 1977, pp. 1–54.
Donato A. eSusco D.,Su alcune proprietà di un modello iperbolico per la propagazione del calore, Atti Sem. Mat. Fis. Modena, 30, 1981, pp. 191–206.
Donato A.,On a supplementary conservation law for the energy equation in a rigid heat conductor, Int. Journal of Non-linear Mech., 18, n. 1, 1983, pp. 11–19.
Donato A.,On a supplementary conservation law for the balance laws in thermoelastic bodies, Meccanica, 18, 1983, pp. 229–232.
Truesdell C. andToupin R.,The classical field theories, Handbuch der Physik, vol. III/1, Berlin-Göttingen-Heidelberg: Springer 1960.
Ruggeri T.,Sistema iperbolico in forma simmetrica conservativa per le equazioni di un fluido viscoso conduttore di calore, Atti del Convegno «Onde e Stabilità nei mezzi continui». Catania 3–6/11/1981, Tip. Univ. Catania, 1982, pp. 107–128.
Ruggeri, T.,Generators of hyperbolic heat equation in nonlinear Thermoelasticity. Rend. Sem. Mat. Univ. Padova, 68, 1982, pp. 79–91.
Ruggeri, T.,Symmetric-hyperbolic system of conservative equations for a viscous heat conducting fluid, Acta, Mech., 47, 1983, pp. 167–183.
Boillat G.,Symmétrisation des systèmes d'équations aux dérivées partielles avec densité d'énergie convexe et contraintes, C.R. Acad. Sc. Paris, 295 I, 1982, pp. 551–554.
I-Shih Liu,Method of Lagrange multipliers for exploitation of the entropy principle, Arch. Rat. Mech. Analysis, 46, 1972, pp. 131–148.
Hutter K.,On thermodynamics and thermostatics of viscous thermoelastic solids in the electromagnetic fields. A Lagrangian formulation, Arch. Rat. Mech. Analysis, 58, 1975, pp. 339–368.
Hutter K.,A thermodynamic theory of fluids and solids in electromagnetic fields, Arch. Rat. Mech. Analysis, 64, 1977, pp. 269–298.
Friedrichs K.O. andLax P.D.,System of conservation equations with a convex extension, Proc. Nat. Acad. Sc. USA, 68, 1971, pp. 1686–1688.
I-Shih Liu andMuller I.,On the thermodynamics and thermostatics of fluids in electromagnetic fields, Arch. Rat. Mech. Analysis, 46, 1972, pp. 149–176.
Graffi D.,Su alcune questioni di elettromagnetismo, Lezioni tenute all'Ist. Mecc. Raz. Ing. Napoli e all'Ist. Matematico Bologna, nel 1977 e 1978, Ist. Mecc. Raz. Ing. Napoli, pp. 55–61, e p. 211.
Coleman B.D. andDill E.H.,On the thermodynamics of electromagnetic fields in materials with memory, Arch. Rat. Mech. Analysis, 41, 1971, pp. 132–162.
Boillat G.,Sur l'existence et la recherche d'equations de conservation supplementaires pour les systemes hyperboliques, C.R. Acad. Sc. Paris, 270A, 1974, pp. 909–912.
Boillat G.,Sur une function croissante comme l'entropie et génératrice des chocs dans les systemes hyperboliques. C.R. Acad. Sc. Paris, 283A, 1976, pp. 409–412.
Author information
Authors and Affiliations
Additional information
Research partially supported by C.N.R. through the G.N.F.M.
Rights and permissions
About this article
Cite this article
Valenti, A. On a supplementary conservation law for the governing equations in a rigid, magnetizable body with thermal and electrical conduction. Meccanica 20, 195–198 (1985). https://doi.org/10.1007/BF02336931
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02336931