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Communication Dans Un Congrès Année : 2018

Data-Driven Deterministic Symbolic Regression of Nonlinear Stress-Strain Relation for RANS Turbulence Modelling

Résumé

This work presents developments towards a deterministic symbolic regression method to derive algebraic Reynolds-stress models for the Reynolds-Averaged Navier-Stokes (RANS) equations. The models are written as tensor polynomials, for which optimal coe cients are found using Bayesian inversion. These coe cient fields are the targets for the symbolic regression. A method is presented based on a regularisation strategy in order to promote sparsity of the inferred models and is applied to high-fidelity data. By being data-driven the method reduces the assumptions commonly made in the process of model development in order to increase the predictive fidelity of algebraic models.
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Dates et versions

hal-02170808 , version 1 (02-07-2019)

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Martin Schmelzer, Richard Dwight, Paola Cinnella. Data-Driven Deterministic Symbolic Regression of Nonlinear Stress-Strain Relation for RANS Turbulence Modelling. 2018 Fluid Dynamics Conference, 2018, Atlanta, Georgia, United States. pp.AIAA 2018-2900, ⟨10.2514/6.2018-2900⟩. ⟨hal-02170808⟩
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