Reduced order fluid modeling with generative adversarial networks

Reduced order fluid modeling with generative adversarial networks

Kemna, Maarten (Student TU Delft)
Heinlein, A. (TU Delft Numerical Analysis)
Vuik, Cornelis (TU Delft Delft Institute of Applied Mathematics)

2023

Surrogate models based on convolutional neural networks (CNNs) for computational fluid dynamics (CFD) simulations are investigated. In particular, the flow field inside two-dimensional channels with a sudden expansion and an obstacle is predicted using an image representation of the geometry as the input. Generative adversarial neural networks (GANs) have been shown to excel at such image-to-image translation tasks. This motivates the focus of this work on investigating the specific effect of adversarial training on model performance. Numerical results show that the overall accuracy of the GANs is generally lower compared to an identical generator model trained directly on the ground truth using an L1 data loss. On the other hand, GAN predictions are often visually more convincing and exhibit a lower continuity residual.

http://resolver.tudelft.nl/uuid:c6607e4e-5164-48c2-87ee-5af866d2ed87

https://doi.org/10.1002/pamm.202200241

1617-7061

Proceedings in Applied Mathematics and Mechanics, 23

92nd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), 2022-08-15 → 2022-08-19, Aachen, Germany

Institutional Repository

journal article

© 2023 Maarten Kemna, A. Heinlein, Cornelis Vuik