Operator inference for non-intrusive model reduction with quadratic manifolds

R Geelen, S Wright, K Willcox - Computer Methods in Applied Mechanics …, 2023 - Elsevier
This paper proposes a novel approach for learning a data-driven quadratic manifold from
high-dimensional data, then employing this quadratic manifold to derive efficient physics …

[HTML][HTML] POD-DL-ROM: Enhancing deep learning-based reduced order models for nonlinear parametrized PDEs by proper orthogonal decomposition

S Fresca, A Manzoni - Computer Methods in Applied Mechanics and …, 2022 - Elsevier
Deep learning-based reduced order models (DL-ROMs) have been recently proposed to
overcome common limitations shared by conventional reduced order models (ROMs)–built …

Model reduction and neural networks for parametric PDEs

K Bhattacharya, B Hosseini, NB Kovachki… - The SMAI journal of …, 2021 - numdam.org
We develop a general framework for data-driven approximation of input-output maps
between infinitedimensional spaces. The proposed approach is motivated by the recent …

A review of advances towards efficient reduced-order models (ROM) for predicting urban airflow and pollutant dispersion

S Masoumi-Verki, F Haghighat, U Eicker - Building and Environment, 2022 - Elsevier
Computational fluid dynamics (CFD) models have been used for the simulation of urban
airflow and pollutant dispersion, due to their capability to capture different length scales and …

Deep learning for reduced order modelling and efficient temporal evolution of fluid simulations

P Pant, R Doshi, P Bahl, A Barati Farimani - Physics of Fluids, 2021 - pubs.aip.org
Reduced order modeling (ROM) has been widely used to create lower order,
computationally inexpensive representations of higher-order dynamical systems. Using …

[HTML][HTML] A graph convolutional autoencoder approach to model order reduction for parametrized PDEs

F Pichi, B Moya, JS Hesthaven - Journal of Computational Physics, 2024 - Elsevier
The present work proposes a framework for nonlinear model order reduction based on a
Graph Convolutional Autoencoder (GCA-ROM). In the reduced order modeling (ROM) …

[HTML][HTML] Multi-fidelity regression using artificial neural networks: Efficient approximation of parameter-dependent output quantities

M Guo, A Manzoni, M Amendt, P Conti… - Computer methods in …, 2022 - Elsevier
Highly accurate numerical or physical experiments are often very time-consuming or
expensive to obtain. When time or budget restrictions prohibit the generation of additional …

Lasdi: Parametric latent space dynamics identification

WD Fries, X He, Y Choi - Computer Methods in Applied Mechanics and …, 2022 - Elsevier
Enabling fast and accurate physical simulations with data has become an important area of
computational physics to aid in inverse problems, design-optimization, uncertainty …

Multi-fidelity surrogate modeling using long short-term memory networks

P Conti, M Guo, A Manzoni, JS Hesthaven - Computer methods in applied …, 2023 - Elsevier
When evaluating quantities of interest that depend on the solutions to differential equations,
we inevitably face the trade-off between accuracy and efficiency. Especially for …

Neural-network-augmented projection-based model order reduction for mitigating the Kolmogorov barrier to reducibility

J Barnett, C Farhat, Y Maday - Journal of Computational Physics, 2023 - Elsevier
Inspired by our previous work on a quadratic approximation manifold [1], we propose in this
paper a computationally tractable approach for combining a projection-based reduced-order …