Nonlinear reduced order modeling using domain decomposition

N Iyengar, D Rajaram, K Decker, C Perron… - AIAA SciTech 2022 …, 2022 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2022-1250. vid As designers become
increasingly reliant upon expensive, high-fidelity numerical modeling and simulation …

Nonlinear manifold learning and model reduction for transonic flows

B Zheng, W Yao, M Xu - AIAA Journal, 2023 - arc.aiaa.org
It is aspirational to construct a nonlinear reduced-order model (ROM) with the ability to
predict computational fluid dynamics (CFD) solutions accurately and efficiently. One major …

Manifold alignment-based multi-fidelity reduced-order modeling applied to structural analysis

C Perron, D Sarojini, D Rajaram, J Corman… - Structural and …, 2022 - Springer
This work presents the application of a recently developed parametric, non-intrusive, and
multi-fidelity reduced-order modeling method on high-dimensional displacement and stress …

Uncertainty Propagation in High-Dimensional Fields using Non-Intrusive Reduced Order Modeling and Polynomial Chaos

N Iyengar, D Rajaram, K Decker… - AIAA SciTech 2023 Forum, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-1686. vid High-fidelity, physics-
based modeling and simulation have become integral to the design of aircraft, but can have …

Manifold alignment-based nonintrusive and nonlinear multifidelity reduced-order modeling

K Decker, N Iyengar, D Rajaram, C Perron, D Mavris - AIAA Journal, 2023 - arc.aiaa.org
This study presents the development of a methodology for the construction of data-driven,
parametric, multifidelity reduced-order models to emulate aerodynamic flowfields with …

A multidisciplinary analysis framework for the sizing and synthesis of hypersonic aerial systems

K Decker, DN Mavris - AIAA SCITECH 2023 Forum, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-2365. vid Modern hypersonic
vehicles are highly integrated, tightly coupled multidisciplinary systems. This study …

Uncertainty Quantification in Flows with Discontinuities: A Probabilistic Approach on Nonlinear Manifolds

N Iyengar, D Rajaram, DN Mavris - AIAA AVIATION 2023 Forum, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-4092. vid Uncertainty quantification
(UQ) in transonic and supersonic flows is difficult due to the presence of strong …

High-Dimensional Uncertainty Propagation in Aerodynamics using Polynomial Chaos-Kriging

N Iyengar, DN Mavris - AIAA AVIATION 2023 Forum, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-3766. vid Uncertainty propagation
in simulations with high-dimensional outputs, such as computational fluid dynamics, is …

Domain Decomposition Strategy for Combining Nonlinear and Linear Reduced-Order Models

N Iyengar, D Rajaram, D Mavris - AIAA Journal, 2024 - arc.aiaa.org
Increasingly ubiquitous reliance on expensive, high-fidelity numerical simulations has led to
the emergence of reduced-order modeling as an effective method to predict high …

A Reduced Order Modeling Approach to Blunt-Body Aerodynamic Modeling

HV Dean, K Decker, BE Robertson… - AIAA SCITECH 2024 …, 2024 - arc.aiaa.org
Blunt-body entry vehicles display complex flow phenomena that results in dynamic
instabilities in the low supersonic to transonic flight regime. Dynamic stability coefficients are …