arXiv Machine Learning

PoreML: A Data-Driven Framework for Learning Multiphase Flow in Porous Media

PoreML is an open‑source, GPU‑native framework that unifies data generation, model training, and evaluation for multiphase flow in porous media. It includes a validated lattice Boltzmann solver, a 3.3 TB dataset of 560 simulation runs with 158,546 time steps covering synthetic and micro‑CT derived structures, and a learning framework that assesses one‑step prediction and autoregressive rollouts with domain‑specific protocols. Five diverse models were evaluated, and two challenges test transfer to larger domains and to real‑material geometries.

arXiv AI
Jul 28

Physics-Guided Generative AI for Property-Targeted 3D Porous Media Design

arXiv:2607. 24274v1 Announce Type: cross Abstract: Inverse design of three-dimensional porous media is central to applications in filtration, catalysis, energy storage, fuel cells, thermal management, and biomedical scaffolds, but remains challenging because many distinct pore geometries can share similar porosity or permeability while small structural changes can strongly affect transport behaviour.

By Peng Wang
arXiv Machine Learning
Sep 24

An Adaptive Machine Learning Framework for Fluid Flow in Dual-Network Porous Media

The paper introduces a physics-informed neural network (PINN) framework for modeling fluid flow in dual‑network porous media, specifically addressing double porosity/permeability (DPP) systems. The framework embeds governing equations and boundary conditions into the loss function with adaptive weighting, employs dynamic collocation point selection, and uses shared trunk architectures to efficiently capture coupled pore‑network behavior. It is mesh‑free, accurately handles discontinuities across layered domains, and supports robust inverse analysis for parameter identification, with a systematic convergence study validating its stability and accuracy.

By V. S. Maduri, K. B. Nakshatrala
arXiv Machine Learning
Jun 25

Surrogate models for Rock-Fluid Interaction: A Grid-Size-Invariant Approach

arXiv:2602. 22188v2 Announce Type: replace Abstract: Modelling rock-fluid interaction requires solving a set of partial differential equations (PDEs) to predict the flow behaviour and the reactions of the fluid with the rock on the interfaces.

By Nathalie C. Pinheiro, Donghu Guo, Hannah P. Menke, Aniket C. Joshi, Claire E. Heaney, Ahmed H. ElSheikh, Christopher C. Pain
arXiv Machine Learning
Oct 15

Constitutive parameterized deep energy method for solid mechanics problems with random material parameters

The paper introduces the Constitutive Parameterized Deep Energy Method (CPDEM), a physics‑driven neural network that embeds stochastic material parameters directly into the strain energy density functional. By training via expected energy minimization over the parameter domain, CPDEM learns a continuous solution manifold, enabling zero‑shot, real‑time inference of displacement fields for any material parameters without retraining or dataset generation. The method is validated on linear elasticity, finite‑strain hyperelasticity, and highly nonlinear contact mechanics, marking the first purely physics‑driven deep learning approach that efficiently handles continuous multi‑parameter variations in solid mechanics.

By Zhangyong Liang, Jihong Zhu, Huanhuan Gao
arXiv AI
Jul 28

Neptuna: A Comprehensive Machine Learning Framework for Benchmarking Complex Multiphase Flows

arXiv:2607. 22280v2 Announce Type: replace-cross Abstract: Compressible multiphase flows involving shocks and material interfaces arise in applications such as bubble collapse and droplet breakup, where strong nonlinear interactions produce complex interface deformation, mixing, and multiscale dynamics.

By Harish Ramachandran, Bj\"orn Kimpel, Thomas Paula, Josef Winter, Steffen Schmidt, Nikolaus Adams
arXiv Machine Learning
Oct 28

Flow Mesh: A Velocity-Regularized Flow Matching Framework for Stable Distributional Modeling of Physical Fields on Unstructured Meshes

FlowMesh is a generative framework that produces full-field thermal‑fluid realizations directly on fixed unstructured meshes by combining permutation‑invariant mesh encoding, deterministic latent flow matching, and an l1 penalty on transport velocity. It achieves high probability‑density‑function coverage (91.7%–97.0%) and significant reductions in temperature‑field Kullback–Leibler divergence compared to latent diffusion models, while generating each realization in about 1.2 s—over 500‑fold faster than traditional computational fluid dynamics. The method enables large‑scale, data‑driven characterization of thermal‑fluid states on complex geometries without the need for grid interpolation or stochastic denoising chains.

By Siddharth Verma, Jaewan Park, Jay Phil Yoo, Kazuma Kobayashi, Souvik Chakraborty, Syed Bahauddin Alam
arXiv Machine Learning
Oct 2

Riemannian Flow Models with Reinforcement Learning for Molecular Crystal Structure Prediction

The paper introduces CG-OMatG, an equivariant Riemannian flow-based generative model that predicts molecular crystal structures using a coarse-grained, hierarchical representation. It treats molecules as rigid bodies, performs inter- and intra-molecular message passing, and learns to reconstruct molecule centroids, orientations, and lattice parameters conditioned on chemical species and conformer geometry. The model is trained on OMC25 and CSD datasets, fine-tuned with policy gradient reinforcement learning to favor low-energy structures, and validated against a CSP blind test benchmark using COMPACK packing-similarity analysis.

By Thomas Egg, Harry Winston Sullivan, Maya M. Martirossyan, Philipp H\"ollmer, Cheng Zeng, Adrian Roitberg, Mingjie Liu, Richard Hennig, Sapna Sarupria, Ellad B. Tadmor, Stefano Martiniani