arXiv Machine Learning By Ramansh Sharma, Matthew Lowery, Houman Owhadi, Varun Shankar

Fluids You Can Trust: Property-Preserving Operator Learning for Incompressible Flows

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The paper introduces a kernel‑based operator learning method that preserves key physical properties—such as incompressibility, periodicity, and turbulence—of the incompressible Navier–Stokes equations. By mapping input functions to expansion coefficients in a property‑preserving kernel basis, the method guarantees that predicted velocity fields analytically maintain these properties. The authors provide theoretical convergence guarantees, develop efficient computational techniques for large‑scale training, and demonstrate significant accuracy and speed improvements over neural operators on 2D and 3D flow benchmarks.

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