Paul, Kamalesh; Mukhopadhyay, B. On a fractional order generalized thermo-elastic diffusion theorem. (English) Zbl 1469.35230 Int. J. Adv. Appl. Math. Mech. 7, No. 4, 51-63 (2020). Summary: In this work, a new theory of thermo-diffusion in elastic solids is derived using the methodology of fractional calculus. The theories of coupled thermo-elastic diffusion and of generalized thermo-elastic diffusion problem with one relaxation time and also of generalized thermo-elastic diffusion in GN models follow as limit cases. A uniqueness and reciprocity theorem for these equations are derived using Laplace transform technique on the assumption of symmetry of stress tensor and positivity of associated parameters. Finally, a variational theorem is obtained for the governing equations. MSC: 35R11 Fractional partial differential equations 35A02 Uniqueness problems for PDEs: global uniqueness, local uniqueness, non-uniqueness 74A15 Thermodynamics in solid mechanics 74F05 Thermal effects in solid mechanics 80A19 Diffusive and convective heat and mass transfer, heat flow Keywords:fractional calculus; generalized thermoelastic-diffusion theory; uniqueness theorem; reciprocity theorem; variational principle × Cite Format Result Cite Review PDF Full Text: Link References: [1] M. A. Biot, Thermoelasticity and irreversible thermodynamics, J. Appl. Phys. 27(3) (1956) 240-253. · Zbl 0071.41204 [2] H. Lord, Y. Shulman, A generalized dynamical theory of thermoelasticity, J. Mech. Phys. Solids.15(5) (1967) 299-309. · Zbl 0156.22702 [3] H. H. Sherief, M. A. Ezzat, Solution of the generalized problem of thermoelasticity in the form of series of functions. J. Therm. Stress. 17(1) (1994) 75-95. [4] J. Ignaczak, Uniqueness in generalized thermoelasticity, J. Therm. 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