Journal
FLUIDS
Volume 3, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/fluids3040086
Keywords
quasi-geostrophic ocean model; hybrid modeling; extreme learning machine; proper orthogonal decomposition; Galerkin projection
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Funding
- U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research [DE-SC0019290]
- agency of the United States Government
- U.S. Department of Energy (DOE) [DE-SC0019290] Funding Source: U.S. Department of Energy (DOE)
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We put forth a robust reduced-order modeling approach for near real-time prediction of mesoscale flows. In our hybrid-modeling framework, we combine physics-based projection methods with neural network closures to account for truncated modes. We introduce a weighting parameter between the Galerkin projection and extreme learning machine models and explore its effectiveness, accuracy and generalizability. To illustrate the success of the proposed modeling paradigm, we predict both the mean flow pattern and the time series response of a single-layer quasi-geostrophic ocean model, which is a simplified prototype for wind-driven general circulation models. We demonstrate that our approach yields significant improvements over both the standard Galerkin projection and fully non-intrusive neural network methods with a negligible computational overhead.
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