Turbulence modeling in the age of data

K Duraisamy, G Iaccarino, H **ao - Annual review of fluid …, 2019 - annualreviews.org
Data from experiments and direct simulations of turbulence have historically been used to
calibrate simple engineering models such as those based on the Reynolds-averaged Navier …

Quantification of model uncertainty in RANS simulations: A review

H **ao, P Cinnella - Progress in Aerospace Sciences, 2019 - Elsevier
In computational fluid dynamics simulations of industrial flows, models based on the
Reynolds-averaged Navier–Stokes (RANS) equations are expected to play an important …

[HTML][HTML] Explore missing flow dynamics by physics-informed deep learning: The parameterized governing systems

H Xu, W Zhang, Y Wang - Physics of Fluids, 2021 - pubs.aip.org
Gaining and understanding flow dynamics have much importance in a wide range of
disciplines, eg, astrophysics, geophysics, biology, mechanical engineering, and biomedical …

Sparse Bayesian learning of explicit algebraic Reynolds-stress models for turbulent separated flows

S Cherroud, X Merle, P Cinnella, X Gloerfelt - International Journal of Heat …, 2022 - Elsevier
Abstract A novel Sparse Bayesian Learning (SBL) framework is introduced for generating
stochastic Explicit Algebraic Reynolds Stress (EARSM) closures for the Reynolds-Averaged …

[HTML][HTML] A probabilistic, data-driven closure model for RANS simulations with aleatoric, model uncertainty

A Agrawal, PS Koutsourelakis - Journal of Computational Physics, 2024 - Elsevier
We propose a data-driven, closure model for Reynolds-averaged Navier-Stokes (RANS)
simulations that incorporates aleatoric, model uncertainty. The proposed closure consists of …

[HTML][HTML] Dimensionality reduction for regularization of sparse data-driven RANS simulations

P Piroozmand, O Brenner, P Jenny - Journal of Computational Physics, 2023 - Elsevier
Data assimilation can reduce the model-form errors of RANS simulations. A spatially
distributed corrective parameter field can be introduced into the closure model, whose …

Regularized ensemble Kalman methods for inverse problems

XL Zhang, C Michelén-Ströfer, H **ao - Journal of Computational Physics, 2020 - Elsevier
Inverse problems are common and important in many applications in computational physics
but are inherently ill-posed with many possible model parameters resulting in satisfactory …

CFD-driven symbolic identification of algebraic Reynolds-stress models

IBH Saïdi, M Schmelzer, P Cinnella, F Grasso - Journal of Computational …, 2022 - Elsevier
A CFD-driven deterministic symbolic identification algorithm for learning explicit algebraic
Reynolds-stress models (EARSM) from high-fidelity data is developed building on the frozen …

Quantification of Reynolds-averaged-Navier–Stokes model-form uncertainty in transitional boundary layer and airfoil flows

M Chu, X Wu, DE Rival - Physics of Fluids, 2022 - pubs.aip.org
It is well known that the Boussinesq turbulent-viscosity hypothesis can introduce uncertainty
in predictions for complex flow features such as separation, reattachment, and laminar …

Evaluation of machine learning algorithms for predictive Reynolds stress transport modeling

JP Panda, HV Warrior - Acta Mechanica Sinica, 2022 - Springer
The application of machine learning (ML) algorithms to turbulence modeling has shown
promise over the last few years, but their application has been restricted to eddy viscosity …