Towards data-driven turbulence modeling for wind turbine wakes

The Dutch energy strategy expects renewable energy sources like wind and solar to provide around 70% of the yearly electricity by 2030. In order to achieve these targets, models that efficiently and accurately capture the flow around wind turbines would be immensely helpful for both planning and operation of wind farms.<br/><br/>For wind turbine...

Wind turbine rotor aerodynamics: The IEA MEXICO rotor explained

Wind turbines are operating under very complex and uncontrolled environmental conditions, including atmospheric turbulence, atmospheric boundary layer effects, directional and spatial variations in wind shear, etc. Over the past decades, the size of a commercial wind turbine has increased considerably. All the complex and uncontrolled conditions...

Towards a Multi-Fidelity Approach for CFD Simulations of Vortex Generator Arrays

This paper is the starting point for the development of a multi-fidelity modeling approach for vortex generators (VG) arrays, where a fully resolved VG model will be coupled with an approximate model in order to improve both accuracy and flexibility without increasing the required computational cost. As a first step thereto, an analysis of the...

Flow and bathymetry in sharp open-channel bends: Experiments and predictions

This paper focuses on experiments and simulations conducted in very sharp open-channel bends with flat and equilibrium bathymetry, corresponding to the initial and final phases of the erosion and deposition processes, respectively. The study of flow in curved open bends is relevant for flow in natural river configurations, as most river reaches...

Turbulence modelling improvement for highly detached unsteady aerodynamic flows by statistical and hybrid approaches

This paper analyses the performances of adapted URANS and DES turbulence^modelling for high-Reynolds 2D and 3D aerodynamic flows with a pronounced periodic character. The flow configurations is the NACA0012 airfoil in pitch (experimental test-case by Mc Croskey & Mc Alistair, 1976) at Reynolds number 0.98x10^6, as well as the inherently unsteady...

Numerical study of turbulent flow around a square cylinder using low-Reynolds-number k-e model

This paper discusses the abilities of two different low-Reynolds-number eddy-viscosity models in resolving the complex physical features that arises in turbulent flows around a square cylinder at Re=22000. For the modeling of turbulence, the Launder & Sharma (LS) [1] and Kawamura & Kawashima (KK) [2] low-Re models have been employed. The present...