Data-driven modeling for unsteady aerodynamics and aeroelasticity

J Kou, W Zhang - Progress in Aerospace Sciences, 2021 - Elsevier
Aerodynamic modeling plays an important role in multiphysics and design problems, in
addition to experiment and numerical simulation, due to its low-dimensional representation …

Multi-level convolutional autoencoder networks for parametric prediction of spatio-temporal dynamics

J Xu, K Duraisamy - Computer Methods in Applied Mechanics and …, 2020 - Elsevier
A data-driven framework is proposed towards the end of predictive modeling of complex
spatio-temporal dynamics, leveraging nested non-linear manifolds. Three levels of neural …

Hybrid analysis and modeling, eclecticism, and multifidelity computing toward digital twin revolution

O San, A Rasheed, T Kvamsdal - GAMM‐Mitteilungen, 2021 - Wiley Online Library
Most modeling approaches lie in either of the two categories: physics‐based or data‐driven.
Recently, a third approach which is a combination of these deterministic and statistical …

Sparsity-promoting algorithms for the discovery of informative Koopman-invariant subspaces

S Pan, N Arnold-Medabalimi… - Journal of Fluid …, 2021 - cambridge.org
Koopman decomposition is a nonlinear generalization of eigen-decomposition, and is being
increasingly utilized in the analysis of spatio-temporal dynamics. Well-known techniques …

[HTML][HTML] Model reduction of coupled systems based on non-intrusive approximations of the boundary response maps

N Discacciati, JS Hesthaven - Computer Methods in Applied Mechanics …, 2024 - Elsevier
We propose a local, non-intrusive model order reduction technique to accurately
approximate the solution of coupled multi-component parametrized systems governed by …

Component-based reduced order modeling of large-scale complex systems

C Huang, K Duraisamy, C Merkle - Frontiers in Physics, 2022 - frontiersin.org
Large-scale engineering systems, such as propulsive engines, ship structures, and wind
farms, feature complex, multi-scale interactions between multiple physical phenomena …

Localized model order reduction and domain decomposition methods for coupled heterogeneous systems

N Discacciati, JS Hesthaven - International Journal for …, 2023 - Wiley Online Library
We propose a model order reduction technique to accurately approximate the behavior of
multi‐component systems without any a‐priori knowledge of the coupled model. In the …

Investigations and improvement of robustness of reduced-order models of reacting flow

C Huang, K Duraisamy, CL Merkle - AIAA Journal, 2019 - arc.aiaa.org
The impact of chemical reactions on the robustness and accuracy of projection-based
reduced-order models (ROMs) of fluid flows is investigated. Both Galerkin and least squares …

Active control of multiple neural networks for oscillating combustion

L Zhang, X Su, H Zhou, X Wang, Z Ren - AIAA Journal, 2022 - arc.aiaa.org
A multiple neural network controller is proposed and demonstrated to suppress the pressure
oscillation of the Rijke tube acoustic network. This controller consists of three modules …

Multifidelity computing for coupling full and reduced order models

SE Ahmed, O San, K Kara, R Younis, A Rasheed - Plos one, 2021 - journals.plos.org
Hybrid physics-machine learning models are increasingly being used in simulations of
transport processes. Many complex multiphysics systems relevant to scientific and …