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• W3013803313 abstract "A data-driven framework for formulation of closures of the Reynolds-Average Navier--Stokes (RANS) equations is presented. In recent years, the scientific community has turned to machine learning techniques to distill a wealth of highly resolved data into improved RANS closures. While the body of work in this area has primarily leveraged Neural Networks (NNs), we alternately leverage a sparse regression framework. This methodology has two important properties: (1) The resultant model is in a closed, algebraic form, allowing for direct physical inferences to be drawn and naive integration into existing computational fluid dynamics solvers, and (2) Galilean invariance can be guaranteed by thoughtful tailoring of the feature space. Our approach is demonstrated for two classes of flows: homogeneous free shear turbulence and turbulent flow over a wavy wall. This work demonstrates equivalent performance to that of modern NNs but with the added benefits of interpretability, increased ease-of-use and dissemination, and robustness to sparse training datasets." @default.
• W3013803313 created "2020-04-03" @default.
• W3013803313 creator A5011753205 @default.
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• W3013803313 date "2020-08-28" @default.
• W3013803313 modified "2023-09-30" @default.
• W3013803313 title "Formulating turbulence closures using sparse regression with embedded form invariance" @default.
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• W3013803313 doi "https://doi.org/10.1103/physrevfluids.5.084611" @default.
• W3013803313 hasPublicationYear "2020" @default.
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