Multiscale analysis in nonlinear thermal diffusion problems in composite structures

• Authors: Claudia Timofte
• Languages of publication: EN

Abstracts

EN

The aim of this paper is to analyze the asymptotic behavior of the solution of a nonlinear problem arising in the modelling of thermal diffusion in a two-component composite material. We consider, at the microscale, a periodic structure formed by two materials with different thermal properties. We assume that we have nonlinear sources and that at the interface between the two materials the flux is continuous and depends in a dynamical nonlinear way on the jump of the temperature field. We shall be interested in describing the asymptotic behavior of the temperature field in the periodic composite as the small parameter which characterizes the sizes of our two regions tends to zero. We prove that the effective behavior of the solution of this system is governed by a new system, similar to Barenblatt’s model, with additional terms capturing the effect of the interfacial barrier, of the dynamical boundary condition, and of the nonlinear sources.

Keywords

EN

homogenization; composite materials; interfacial barrier; dynamical boundary conditions

Discipline

• 02.60.Lj: Ordinary and partial differential equations; boundary value problems
• 44.35.+c: Heat flow in multiphase systems

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2010
• Volume: 8
• Issue: 4
• Pages: 555-561

Dates

published

1 - 8 - 2010

online

22 - 5 - 2010

Contributors

author

Claudia Timofte

• Faculty of Physics, University of Bucharest, P.O. Box MG-11, Bucharest-Magurele, Romania

References

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Identifiers

DOI

10.2478/s11534-009-0141-6