354 citations · 5.2k across the 75 of their papers we have counts for
9 papers · 1 filter
Temporal structure of aggregate power fluctuations in large-eddy simulations of extended wind-farms
Richard J. A. M. Stevens, Charles Meneveau
Fluctuations represent a major challenge for the incorporation of electric power from large wind-farms into power grids. Wind farm power output fluctuates strongly in time, over va…
Heat transport in boiling turbulent Rayleigh-Bénard convection
Rajaram Lakkaraju, Richard J. A. M. Stevens, Paolo Oresta +3
Boiling is an extremely effective way to promote heat transfer from a hot surface to a liquid due to several mechanisms many of which are not understood in quantitative detail. An…
Sidewall effects in Rayleigh-Bénard convection
Richard J. A. M. Stevens, Detlef Lohse, Roberto Verzicco
We investigate the influence of the temperature boundary conditions at the sidewall on the heat transport in Rayleigh-Bénard (RB) convection using direct numerical simulations. For…
Turbulent Rayleigh-Bénard convection described by projected dynamics in phase space
Johannes Lülff, Michael Wilczek, Richard J. A. M. Stevens +2
Rayleigh-Bénard convection, i.e. the flow of a fluid between two parallel plates that is driven by a temperature gradient, is an idealised setup to study thermal convection. Of spe…
Spatio-temporal spectra in the logarithmic layer of wall turbulence: large-eddy simulations and simple models
Michael Wilczek, Richard J. A. M. Stevens, Charles Meneveau
Motivated by the need to characterize the spatio-temporal structure of turbulence in wall-bounded flows, we study wavenumber-frequency spectra of the streamwise velocity component…
Coupled wake boundary layer model of wind-farms
Richard J. A. M. Stevens, Dennice F. Gayme, Charles Meneveau
We present and test the coupled wake boundary layer (CWBL) model that describes the distribution of the power output in a wind-farm. The model couples the traditional, industry-sta…
Large Eddy Simulation studies of the effects of alignment and wind farm length
Richard J. A. M. Stevens, Dennice F. Gayme, Charles Meneveau
Large eddy simulations of wind farms are performed to study the effects of wind turbine row alignment with respect to the incoming flow direction. Various wind farms with fixed str…
A concurrent precursor inflow method for Large Eddy Simulations and applications to finite length wind farms
Richard J. A. M. Stevens, Jason Graham, Charles Meneveau
In order to enable simulations of developing wind turbine array boundary layers with highly realistic inflow conditions a concurrent precursor method for Large Eddy Simulations is…
Large-eddy simulation study of the logarithmic law for second and higher-order moments in turbulent wall-bounded flow
Richard J. A. M. Stevens, Michael Wilczek, Charles Meneveau
The logarithmic law for the mean velocity in turbulent boundary layers has long provided a valuable and robust reference for comparison with theories, models, and large-eddy simula…