6 papers
Actuator Disk Models reproduce Actuator Line Model power and thrust fluctuation statistics in wind farm simulations
Manuel Ayala, Dennice Gayme, Charles Meneveau
Actuator-disk models (ADM) are widely used in wind-farm simulations, but their accuracy in reproducing power and thrust temporal fluctuation statistics has not yet been compared to…
Shift or curtail? How much data-center flexibility is worth depends on the host power grid
Saroj Khanal, Geon Roh, Boyu Yao +5
Data-center growth risks overbuilding power grid infrastructure and stranding capital. Flexible data-center operation can defer infrastructure investments, but its value depends on…
Generalised actuator disk theory: wake development with turbulent entrainment
Majid Bastankhah, Peter E. Hydon, Carl Shapiro +2
Classical actuator disk theory, developed more than a century ago, provides an idealised description of turbine rotor performance. It treats a rotor as an infinitesimally-thin perm…
Surface Wave-Aerodynamic Roughness Length Model for Air-Sea Interactions
Manuel Ayala, Dennice Gayme, Charles Meneveau
A new model to evaluate the equivalent hydrodynamic length or surface roughness, z0, of ocean waves is developed and tested. The proposed Surface Wave-Aerodynamic Roughness Length…
An extended analytical wake model and applications to yawed wind turbines in atmospheric boundary layers with different levels of stratification and veer
Ghanesh Narasimhan, Dennice F. Gayme, Charles Meneveau
Analytical wake models provide a computationally efficient means to predict velocity distributions in wind turbine wakes in the atmospheric boundary layer (ABL). Most existing mode…
A Moving Surface Drag Model for LES of Wind over Waves
Manuel Ayala, Zein Sadek, OndÅej FerÄák +3
Numerical prediction of the interactions between wind and ocean waves is essential for climate modeling and a wide range of offshore operations. Large Eddy Simulation (LES) of the…