Publication Abstracts
Senocak et al. 2007
Senocak, I.,
, M.P. Kirkpatrick, D.E. Stevens, and N.N. Mansour, 2007: Study of near-surface models for large-eddy simulations of a neutrally stratified atmospheric boundary layer. Bound.-Layer Meteorol., 124, 405-424, doi:10.1007/s10546-007-9181-x.In large-eddy simulations (LES) of the atmospheric boundary layer (ABL), near-surface models are often used to supplement subgrid-scale (SGS) turbulent stresses when a major fraction of the energetic scales within the surface layer cannot be resolved with the temporal and spatial resolution at hand. In this study, we investigate the performance of both dynamic and non-dynamic eddy viscosity models coupled with near-surface models in simulations of a neutrally stratified ABL. Two near-surface models that are commonly used in LES of the atmospheric boundary layer are considered. Additionally, a hybrid Reynolds- averaged/LES eddy viscosity model is presented, which uses Prandt's mixing length model in the vicinity of the surface, and blends in with the dynamic Smagorinsky model away from the surface. Present simulations show that significant portions of the modelled turbulent stresses are generated by the near-surface models, and they play a dominant role in capturing the expected logarithmic wind profile. Visualizations of the instantaneous vorticity field reveal that flow structures in the vicinity of the surface depend on the choice of the near-surface model. Among the three near-surface models studied, the hybrid eddy viscosity model gives the closest agreement with the logarithmic wind profile in the surface layer. It is also observed that high levels of resolved turbulence stresses can be maintained with the so-called canopy stress model while producing good agreement with the logarithmic wind profile.
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BibTeX Citation
@article{se04100j, author={Senocak, I. and Ackerman, A. S. and Kirkpatrick, M. P. and Stevens, D. E. and Mansour, N. N.}, title={Study of near-surface models for large-eddy simulations of a neutrally stratified atmospheric boundary layer}, year={2007}, journal={Bound.-Layer Meteorol.}, volume={124}, pages={405--424}, doi={10.1007/s10546-007-9181-x}, }
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RIS Citation
TY - JOUR ID - se04100j AU - Senocak, I. AU - Ackerman, A. S. AU - Kirkpatrick, M. P. AU - Stevens, D. E. AU - Mansour, N. N. PY - 2007 TI - Study of near-surface models for large-eddy simulations of a neutrally stratified atmospheric boundary layer JA - Bound.-Layer Meteorol. VL - 124 SP - 405 EP - 424 DO - 10.1007/s10546-007-9181-x ER -
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