Downloads: 80

Files in This Item:
File Description SizeFormat 
a46b0t44.pdf6.52 MBAdobe PDFView/Open
Title: 中立成層状態の大気境界層における組織的乱流構造(第2報)
Other Titles: Coherent Turbulent Structures in the Planetary Boundary Layer during Neutral Stability Conditions (II)
Authors: 堀口, 光章  kyouindb  KAKEN_id
林, 泰一  KAKEN_id
植田, 洋匡  KAKEN_name
Author's alias: HORIGUCHI, Mitsuaki
HAYASHI, Taiichi
UEDA, Hiromasa
Keywords: 組織構造
coherent structure
planetary boundary layer
momentum flux
Issue Date: 1-Apr-2003
Publisher: 京都大学防災研究所
Journal title: 京都大学防災研究所年報. B
Volume: 46
Issue: B
Start page: 469
End page: 477
Abstract: 中立成層状態の大気境界層における組織的な乱流構造について,数値実験によりその空間構造,運動量フラックスへの寄与について調べた。地表面に近い高度では,数100mの空間スケールの平均流方向に伸びた筋状の構造が見られるが,強風域でウェイブレット係数が極値を示す場所を中心とした小領域では,地表近くより境界層の中層部まで運動量フラックスが比較的大きい値を示している。また,下降する動きを示す強風域の構造は,風上方向に傾いて地表付近より境界層の下層部に拡がっている。
Spatial structure and contribution to momentum flux of coherent turbulent structures in the neutrallystratified planetary boundary layer are investigated by numerical experiments. Near the surface streaky structuresare shown. These are elongated in mean wind direction and have spatial scale of several hundred meters. Largermomentum flux is shown from the height near the surface to middle layer of boundary layer in the small areasaround the extreme value of wavelet coefficient (high-speed area). The downward moving structures ofhigh-speed area extend from the height near the surface to lower part of boundary layer and tilt toward thewindward.
Related Link:
Appears in Collections:No.46 B

Show full item record

Export to RefWorks

Export Format: 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.