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Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

Turbulent flow and dispersion from a point source over a two-dimensional hill

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.2410
page 8

Tomoya Houra
Department of Electronical and Mechanical Engineering, Department of Environmental Technology, Nagoya Institute of Technology, Gokiso-cho, Showa-ки, Nagoya 466-8555, JAPAN

Masato Tagawa
Department of Electronical and Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, JAPAN

Yasutaka Nagano
Nagoya Industrial Science Research Institute; Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan


An experimental investigation has been made on the flow and concentration fields over a two-dimensional hill. By varying the elevation of a point source located upstream of the hill model, the effects of the presence of the hill on the turbulent transport of a passive scalar, ethylene, are discussed. At the upstream and hill crest locations, the maximum concentration point locates away from the wall for elevated case, and the value decreases compared with that for the ground level case. In the separated region, the mean concentration profiles are almost uniform in the vertical direction up to the crest of the hill. The hill causes the concentration distribution to strongly expand in the spanwise direction.

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