Predictive large-eddy-simulation wall modeling via physics-informed neural networks

XIA Yang, S Zafar, JX Wang, H Xiao - Physical Review Fluids, 2019 - APS
While data-based approaches were found to be useful for subgrid scale (SGS) modeling in
Reynolds-averaged Navier-Stokes (RANS) simulations, there have not been many attempts …

Frozen propagation of Reynolds force vector from high-fidelity data into Reynolds-averaged simulations of secondary flows

A Amarloo, P Forooghi, M Abkar - Physics of Fluids, 2022 - pubs.aip.org
Successful propagation of information from high-fidelity sources (ie, direct numerical
simulations and large-eddy simulations) into Reynolds-averaged Navier–Stokes (RANS) …

Survey of machine-learning wall models for large-eddy simulation

A Vadrot, XIA Yang, M Abkar - Physical Review Fluids, 2023 - APS
This survey investigates wall modeling in large-eddy simulations (LES) using data-driven
machine-learning (ML) techniques. To this end, we implement three ML wall models in an …

Data-driven quantification of model-form uncertainty in Reynolds-averaged simulations of wind farms

A Eidi, N Zehtabiyan-Rezaie, R Ghiassi, X Yang… - Physics of …, 2022 - pubs.aip.org
Computational fluid dynamics using the Reynolds-averaged Navier–Stokes (RANS) remains
the most cost-effective approach to study wake flows and power losses in wind farms. The …

Multirotor wind turbine wakes

M Bastankhah, M Abkar - Physics of Fluids, 2019 - pubs.aip.org
To fulfill the increasing need for large power generation by wind turbines, the concept of
multirotor wind turbines has recently received attention as a promising alternative to …

Data-driven Reynolds stress models based on the frozen treatment of Reynolds stress tensor and Reynolds force vector

A Amarloo, P Cinnella, A Iosifidis, P Forooghi… - Physics of …, 2023 - pubs.aip.org
For developing a reliable data-driven Reynold stress tensor (RST) model, successful
reconstruction of the mean velocity field based on high-fidelity information (ie, direct …

Quantifying structural uncertainties in Reynolds-averaged Navier–Stokes simulations of wind turbine wakes

SD Hornshøj-Møller, PD Nielsen, P Forooghi… - Renewable Energy, 2021 - Elsevier
Abstract Reynolds-averaged Navier Stokes (RANS) based modeling is considered the
mainstream computational fluid dynamics (CFD) approach for wind energy applications …

Model-form uncertainty quantification in RANS simulations of wakes and power losses in wind farms

A Eidi, R Ghiassi, X Yang, M Abkar - Renewable Energy, 2021 - Elsevier
Abstract Reynolds-averaged Navier-Stokes (RANS) is one of the most cost-efficient
approaches to simulate wind-farm-atmosphere interactions. However, the applicability of …

Velocity and temperature scalings leading to compressible laws of the wall

PG Huang, GN Coleman, PR Spalart… - Journal of Fluid …, 2023 - cambridge.org
We exploit the similarity between the mean momentum equation and the mean energy
equation and derive transformations for mean temperature profiles in compressible wall …

An analytical model for the effect of vertical wind veer on wind turbine wakes

M Abkar, JN Sørensen, F Porté-Agel - Energies, 2018 - mdpi.com
In this study, an analytical wake model for predicting the mean velocity field downstream of a
wind turbine under veering incoming wind is systematically derived and validated. The new …