Micro-scale model comparison (benchmark) at the moderately complex forested site Ryningsnäs
-
Published:2018-12-20
Issue:2
Volume:3
Page:929-946
-
ISSN:2366-7451
-
Container-title:Wind Energy Science
-
language:en
-
Short-container-title:Wind Energ. Sci.
Author:
Ivanell Stefan,Arnqvist Johan,Avila Matias,Cavar Dalibor,Chavez-Arroyo Roberto Aurelio,Olivares-Espinosa Hugo,Peralta Carlos,Adib Jamal,Witha Björn
Abstract
Abstract. This article describes a study in which modellers were challenged to
compute the wind field at a forested site with moderately complex
topography. The task was to model the wind field in stationary conditions
with neutral stratification by using the wind velocity measured at 100 m at
a metmast as the only reference. Detailed maps of terrain elevation and forest
densities were provided as the only inputs, derived from airborne laser scans
(ALSs) with a resolution of 10 m × 10 m covering an area of
50 km × 50 km, that closely match the actual forest and
elevation of the site. The participants were free to apply their best
practices for the simulation to decide the size of the domain, the
value of the geostrophic wind, and every other modelling parameter. The
comparison of the results with the measurements is shown for the vertical
profiles of wind speed, shear, wind direction, and turbulent kinetic energy.
The ALS-based data resulted in reasonable agreement of the wind profile and
turbulence magnitude. The best performance was found to be that of large-eddy
simulations using a very large domain. For the Reynolds-averaged
Navier–Stokes type of models, the constants in the turbulence closure were
shown to have a great influence on the yielded turbulence level, but were of
much less importance for the wind speed profile. Of the variety of closure
constants used by the participating modellers, the closure constants from
Sogachev and Panferov (2006) proved to agree best with the measurements.
Particularly the use of Cμ≈0.03 in the k–ε model
obtained better agreement with turbulence level measurements. All except two
participating models used the full detailed ground and forest information to
model the forest, which is considered significant progress compared to
previous conventional approaches. Overall, the article gives an overview of
how well different types of models are able to capture the flow physics at a
moderately complex forested site.
Publisher
Copernicus GmbH
Subject
Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment
Reference55 articles.
1. Apsley, D. D. and Castro, I. P.: A limited-length-scale k–ϵ model
for the neutral and stably-stratified atmospheric boundary layer, Bound.-Lay.
Meteorol., 83, 75–98, https://doi.org/10.1023/A:1000252210512, 1997. a, b 2. Arnqvist, J., Segalini, A., and Dellwik, E.: Wind Statistics from a Forested
Landscape, Bound.-Lay. Meteorol., 156, 53–71,
https://doi.org/10.1007/s10546-015-0016-x, 2015. a, b, c, d 3. Avila, M., Codina, R., and Principe, J.: Finite element dynamical
subgrid-scale model for low Mach number flows with radiative heat transfer,
Int. J. Numer. Method H., 25, 1361–1384, 2015. a 4. Avila, M., Gargallo-Peiro, A., and Folch, A.: A CFD framework for offshore
and onshore wind farm simulation, J. Phys. Conf. Ser., 854, 012002,
https://doi.org/10.1088/1742-6596/854/1/012002, 2017. a 5. Ayotte, K. W.: Computational Modelling For Wind Energy Assessment, J. Wind
Eng. Ind. Aerod., 96, 1571–1590, https://doi.org/10.1016/j.jweia.2008.02.002, 2008. a
Cited by
20 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|