Progressive Domain Decomposition for Efficient Training of Physics-Informed Neural Network

Dawei Luo, Soo-Ho Jo and Taejin Kim ()
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Dawei Luo: Department of Digital Economics, Changzhou College of Information Technology, Changzhou 213164, China
Soo-Ho Jo: Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul 04620, Republic of Korea
Taejin Kim: Department of Industrial & Information Systems Engineering, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si 54896, Republic of Korea

Mathematics, 2025, vol. 13, issue 9, 1-19

Abstract: This study proposes a strategy for decomposing the computational domain to solve differential equations using physics-informed neural networks (PINNs) and progressively saving the trained model in each subdomain. The proposed progressive domain decomposition (PDD) method segments the domain based on the dynamics of residual loss, thereby indicating the complexity of different sections within the entire domain. By analyzing residual loss pointwise and aggregating it over specific intervals, we identify critical regions requiring focused attention. This strategic segmentation allows for the application of tailored neural networks in identified subdomains, each characterized by varying levels of complexity. Additionally, the proposed method trains and saves the model progressively based on performance metrics, thereby conserving computational resources in sections where satisfactory results are achieved during the training process. The effectiveness of PDD is demonstrated through its application to complex PDEs, where it significantly enhances accuracy and conserves computational power by strategically simplifying the computational tasks into manageable segments.

Keywords: physics-informed neural network; progressive domain decomposition; strategic segmentation (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2025
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