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.
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)
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