Abstract
In this paper, we address the reconstruction of characteristic source functions \(\delta g^*\) in the elliptic partial differential equations \(-\Delta u+u=\delta g^*\) from the knowledge of the boundary measurements. We will detect the shape and location of the unknown source term from additional boundary conditions. We propose a new reconstruction method based on the Kohn–Vogelius formulation and the topological gradient method. The inverse problem is formulated as a topological optimization one. An asymptotic expansion for an energy function is derived with respect to a small topological perturbation of the source term. The unknown source is reconstructed using a level-set curve of the topological gradient. A non-iterative reconstruction procedure based on the topological sensitivity is implemented. The efficiency and accuracy of the reconstruction algorithm are illustrated by some numerical results.
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Hrizi, M., Hassine, M. One-iteration reconstruction algorithm for geometric inverse source problem. J Elliptic Parabol Equ 4, 177–205 (2018). https://doi.org/10.1007/s41808-018-0015-4
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DOI: https://doi.org/10.1007/s41808-018-0015-4
Keywords
- Geometric inverse source problem
- Topological sensitivity analysis
- Topological optimization
- Kohn–Vogelius formulation