Inverse Problem of Identification of Fluxes in Layered Media

In the article we consider a second order parabolic equation and well-posedness questions in Sobolev spaces of inverse problems of recovering the heat flux on the boundary with the use of a given collection of values of a solution at fixed points of the boundary. The diffraction type conditions are employed ate the interface. The boundary condition is nonlinear and the flux is representable in the form of a finite segments of the series with unknown coefficients depending on time. Under certain conditions on the data, it is demonstrated that there exists a unique solution to the problem locally in time which depends on the data continuously. A solution has all generalized derivatives occurring into the equation summable to some power. The proof relies on a priori estimates and the contraction mapping principle. The method is constructive and allows to provide numerical methods of solving the problem. The numerical algorithm is based on the finite element methods and the method of finite differences. The results of numerical experiments are quite satisfactory and the procedure of constructing a solution is stable under small perturbations.

Keywords

inverse problem; boundary regime; parabolic equation; heat and mass transfer.

References

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