arXiv Machine Learning

Computer-assisted global regularity across nonlinear families of three-dimensional periodic Navier-Stokes flows

arXiv Machine Learning
Jul 15

A Shortcut to Statistically Steady-State Turbulence with Flow Matching

arXiv:2607. 13022v1 Announce Type: cross Abstract: Many nonlinear physical systems exhibit an initial transient phase in which perturbations grow before nonlinear interactions lead to a statistically steady state.

By Gianluca Galletti, Gerald Gutenbrunner, William Hornsby, Lorenzo Zanisi, Naomi Carey, Stanislas Pamela, Johannes Brandstetter, Fabian Paischer
arXiv Machine Learning
Sep 22

Learning Physics from an Imperfect Ancestor

arXiv:2609.24947v1 Announce Type: new Abstract: Neural operators evaluate parametric partial differential equations cheaply but degrade sharply outside their training distribution. Physics-informed n...

By S. Mohammad Mousavi, Teeratorn Kadeethum, Nikolaos Bouklas, Somdatta Goswami
arXiv Machine Learning
Jul 15

MUSA-PINN: Multi-scale Weak-form Physics-Informed Neural Networks for Fluid Flow in Complex Geometries

arXiv:2603. 08465v3 Announce Type: replace Abstract: While Physics-Informed Neural Networks (PINNs) offer a mesh-free approach to solving fluid-flow PDEs, standard point-wise residual minimization suffers from convergence pathologies in topologically complex domains like Triply Periodic Minimal Surfaces (TPMS).

By Weizheng Zhang, Xunjie Xie, Hao Pan, Xiaowei Duan, Bingteng Sun, Qiang Du, Lin Lu
arXiv Machine Learning
Sep 22

The Neural Forcing for Three-Dimensional Incompressible Navier-Stokes finite time blowup

The paper introduces a two-part neural framework for generating and analyzing forced three-dimensional incompressible Navier–Stokes flow. Part I focuses on a physics‑informed neural model that produces structured external‑force trajectories, optimizes them via differentiable PDE rollouts or PPO‑Clip, and validates selected forcings through fixed‑force replay. Part II provides a mathematical certification layer that separates neural candidate discovery from continuum analysis, derives integrated reciprocal‑vorticity criteria implying Riccati‑type growth and finite‑time loss of smooth continuation, and establishes a conditional positive‑probability closure for a nondegenerate neural output law, completing the proof at the continuum level.

By Beibei Li
arXiv Machine Learning
Jun 11

Deep Learning of Solver-Aware Turbulence Closures from Nudged LES Dynamics

arXiv:2604. 23874v3 Announce Type: replace-cross Abstract: The differentiable physics paradigm may be leveraged as an a-posteriori approach for discovering turbulence closure models by embedding a neural network parameterization directly inside the solver and optimizing it given potentially sparse target data.

By Ashwin Suriyanarayanan, Dibyajyoti Chakraborty, Romit Maulik