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Title: A Hybrid Approach for Model Order Reduction of Barotropic Quasi-Geostrophic Turbulence

Journal Article · · Fluids

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.

Research Organization:
Oklahoma State Univ., Stillwater, OK (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Grant/Contract Number:
SC0019290
OSTI ID:
1593573
Journal Information:
Fluids, Vol. 3, Issue 4; ISSN 2311-5521
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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A dynamic closure modeling framework for model order reduction of geophysical flows journal April 2019
Memory embedded non-intrusive reduced order modeling of non-ergodic flows journal December 2019
Nonintrusive reduced order modeling framework for quasigeostrophic turbulence journal November 2019
A dynamic closure modeling framework for model order reduction of geophysical flows preprint January 2019
Memory embedded non-intrusive reduced order modeling of non-ergodic flows text January 2019