几何与物理结合：面向非结构化神经 PDE 求解器的数据高效预训练方法

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Abstract:Neural surrogate models for Partial Differential Equations (PDEs) on unstructured 3D geometries are often limited by poor generalization and the high cost of generating large-scale training datasets. Consequently, pre-training on massive datasets of related PDE dynamics has emerged as a critical alternative to enhance the robustness and scalability of these models. However, this strategy is neither compute- nor data-efficient, as it relies on massive pre-computed data that is very costly to generate. In this work, we introduce a disk-data-free pre-training framework tailored to both steady-state and transient regimes. For steady-state problems, we propose a geometry-driven strategy that leverages intrinsic shape descriptors to learn representations of complex 3D domains. For transient problems, we introduce a physics-driven approach based on online generation of synthetic PDE data, enabling scalable pre-training without reliance on expensive datasets. Across multiple experiments, our approach achieves faster convergence, greater data efficiency, and higher accuracy during fine-tuning, particularly under realistic low-data regimes. This methodology provides a practical pathway toward data-efficient neural emulators for large-scale simulations. Code and models are available at this https URL.

Submission history

From: Luis Medrano-Navarro [view email]
[v1] Fri, 2 Oct 2026 14:24:33 UTC (36,011 KB)
[v2] Mon, 5 Oct 2026 07:53:49 UTC (36,008 KB)
[v3] Mon, 26 Oct 2026 14:23:17 UTC (36,008 KB)