Authors:Shayan Dodge (1), Alessandro Formisano (2), Sami Barmada (1) ((1) DESTeC, University of Pisa, Pisa, Italy, (2) Department of Engineering, University of Campania Luigi Vanvitelli, Aversa, Italy)
Abstract:We propose a new weak-form Physics-Informed Neural Network approach (named INI-VPINN). INI-VPINN naturally incorporates Neumann boundary and interface conditions into the variational formulation. It removes the need for additional loss terms or multiple subdomain networks. This framework employs compact support weighting functions and integration by parts to implicitly impose flux and continuity constraints. In this way, it implicitly ensures physical consistency across material boundaries. The proposed method is tested on Poisson and Laplace problems with sharp interfaces and complex geometries. Results show that, compared with several other Physics Informed Neural Networks-based formulations, the INI-VPINN consistently achieves higher accuracy, smoother and faster convergence. The proposed framework provides a general approach for solving multimaterial problems with complex geometries and mixed Neumann-Dirichlet boundary conditions using neural networks. The implementation is publicly available in a GitHub repository.
From: Shayan Dodge [view email]
[v1]
Tue, 16 Jun 2026 15:06:15 UTC (14,715 KB)
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