Coupling models instead of coupling codes: two toy examples

Olivier Lafitte
Coupling models or coupling codes: two examples where the coupled model has better properties than each model. In a simple setting (1d in space), a model of porous media (which is characterized by a degenerate parabolic equation) is coupled with the behavior of the medium, the resulting system is a non degenerate heat equation. Similarly, the diffusion equation of neutronics, which coefficients depend on the local temperature of the nuclear core, is (classically) an eigenvalue...
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