Publications by Dara Vahidi | EPFL Graph Search

Influence of incoming turbulent scales on the wind turbine wake: A large-eddy simulation study

In this study, we aim to investigate the influence of inflow turbulent length scales on wind turbine wakes. For this purpose, large-eddy simulations of the wake of a wind turbine are performed under neutral atmospheric conditions with different boundary la ...

AIP Publishing2024

Potential of Wake Scaling Techniques for Vertical-Axis Wind Turbine Wake Prediction

Fernando Porté Agel, Dara Vahidi

Analytical wake models are widely used to predict wind turbine wakes. While these models are well-established for horizontal-axis wind turbines (HAWTs), the analytical wake models for vertical-axis wind turbines (VAWTs) remain under-explored in the wind en ...

MDPI AG2024

Influence of thrust coefficient on the wake of a wind turbine: A numerical and analytical study

Fernando Porté Agel, Dara Vahidi

In this study, large-eddy simulations (LES) are used to analyze how variations in the thrust coefficient influence the wake of an actuator disk. In a neutrally-stratified turbulent boundary layer, the flow through a standalone actuator disk is simulated on ...

Pergamon-Elsevier Science Ltd2024

Theoretical and numerical studies of wind turbine wakes in the atmospheric boundary layer

Dara Vahidi

This thesis contributes to the research on the challenging topic of wind turbine wake development in the atmospheric boundary layer. Through a combined theoretical and numerical approach, the focus is on developing new frameworks to predict the wind turbin ...

EPFL2024

"A physics-based model for wind turbine wake expansion in the atmospheric boundary layer"

Fernando Porté Agel, Dara Vahidi

Vahidi, Dara, and Fernando Porté-Agel. "A physics-based model for wind turbine wake expansion in the atmospheric boundary layer." Journal of Fluid Mechanics 943 (2022). ...

Zenodo2022

A physics-based model for wind turbine wake expansion in the atmospheric boundary layer

Fernando Porté Agel, Dara Vahidi

Analytical wind turbine wake models are widely used to predict the wake velocity deficit. In these models, the wake growth rate is a key parameter specified mainly with empirical formulations. In this study, a new physics-based model is proposed and valida ...

Cambridge University Press2022

A New Streamwise Scaling for Wind Turbine Wake Modeling in the Atmospheric Boundary Layer

Fernando Porté Agel, Dara Vahidi

In this study, we aim to investigate if there is a scaling of the streamwise distance from a wind turbine that leads to a collapse of the mean wake velocity deficit under different ambient turbulence levels. For this purpose, we perform large-eddy simulati ...

2022