Fractional heat conduction in a sphere under mathematical and physical Robin conditions

Stanisław Kukla, Urszula Siedlecka
2018 Journal of Theoretical and Applied Mechanics  
In this paper, the effect of a fractional order of time-derivatives occurring in fractional heat conduction models on the temperature distribution in a composite sphere is investigated. The research concerns heat conduction in a sphere consisting of a solid sphere and a spherical layer which are in perfect thermal contact. The solution of the problem with a classical Robin boundary condition and continuity conditions at the interface in an analytical form has been derived. The fractional heat
more » ... nduction is governed by the heat conduction equation with the Caputo time-derivative, a Robin boundary condition and a heat flux continuity condition with the Riemann-Liouville derivative. The solution of the problem of non-local heat conduction by using the Laplace transform technique has been determined, and the temperature distribution in the sphere by using a method of numerical inversion of the Laplace transforms has been obtained.
doi:10.15632/jtam-pl.56.2.339 fatcat:c5gya333nzdldj7km7rre4dzja