Wind tunnel experiment on bulk scalar coefficient of urban-like roughness

Aya Hagishima, Jun Tanimoto, Satoru Suenaga, Naoki Ikegaya, Kazuyuki Maeda, Ken Ichi Narita

Research output: Contribution to journalArticle

Abstract

The authors investigated bulk scalar coefficient (CE) of the street in the 3-D canopy with various conditions of arrangement, plan area density (λp), frontal area index (λf), and variability of model height in a wind tunnel using salinity method. The results can be summarized as follows. 1) The relationships between CE and lf of both staggered and normal arrayed canopy with uniform height shows different tendency. The CE of 3-D canopy of staggered and normal pattern have similar value under the sparse (λf) and dense conditions, in contrast, CE of staggered canopy is higher than that of normal canopy under the condition of λf = 17.4%. 2) CE of uniform canopy is larger than that of canopy with height variation under the condition of λf < 17.4%. In contrast, CE of uniform canopy is smaller than that of canopy with height variation under the condition of λf = 30.9%. Such a tendency is opposite to the result of drag force coefficient.

Original languageEnglish
Pages (from-to)1225-1231
Number of pages7
JournalJournal of Environmental Engineering
Volume73
Issue number632
DOIs
Publication statusPublished - Oct 1 2008

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Wind tunnels
Drag
Surface roughness
Experiments

All Science Journal Classification (ASJC) codes

  • Environmental Engineering

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Wind tunnel experiment on bulk scalar coefficient of urban-like roughness. / Hagishima, Aya; Tanimoto, Jun; Suenaga, Satoru; Ikegaya, Naoki; Maeda, Kazuyuki; Narita, Ken Ichi.

In: Journal of Environmental Engineering, Vol. 73, No. 632, 01.10.2008, p. 1225-1231.

Research output: Contribution to journalArticle

Hagishima, Aya ; Tanimoto, Jun ; Suenaga, Satoru ; Ikegaya, Naoki ; Maeda, Kazuyuki ; Narita, Ken Ichi. / Wind tunnel experiment on bulk scalar coefficient of urban-like roughness. In: Journal of Environmental Engineering. 2008 ; Vol. 73, No. 632. pp. 1225-1231.
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