비의류제품

large-eddy simulations of the effects of hilly terrain on the convective boundary layer

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 463
large-eddy simulations of the convective boundary layer are compared over hilly versus flat surfaces. moderate values for the height and horizontal spacing of the hills were selected thermally-direct hill-valley circulations are induced by the uneven terrain, accounting for a significant fraction of the resolved energy in the boundary-layer eddies. the probability of upward eddy motion is discussed. above-average values of both subgrid scale turbulent kinetic energy and upward eddy heat transport are found above the higher terrain. horizontal spectra of vertical motion are strongly biased toward the horizontal scales of the terrain vertical profiles of atmospheric variables obtained by horizontal averaging, however, exhibit no significant differences between hilly and flat terrain simulations
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