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タイトル: Numerical study on mountain waves generated by a two-dimensional mountain and their effect on the transport of Yellow Sand
著者: Utanohara, Yoichi
Kimura, Shigeo link image
Kiwata, Takahiro link image link image
歌野原, 陽一
木村, 繁男
木綿, 隆弘
発行日: 2006年
出版社(者): 日本機械学会
引用: JSME International Journal, Series B: Fluids and Thermal Engineering 49(3), pp. 576-582
雑誌名: JSME International Journal, Series B: Fluids and Thermal Engineering
ISSN: 1340-8054
巻: 49
号: 3
開始ページ: 576
終了ページ: 582
キーワード: Computational fluid dynamics
Mountain waves
Stratified flow
Trapped lee waves
Yellow Sand
抄録: We have studied the effect of ground topography, focusing on mountain waves, on the transport of Yellow Sand by two-dimensional numerical simulation. An advection-diffusion equation for scalar concentration is solved to simulate the transport of Yellow Sand. Two different models are employed: the first is a one-layer model in which the density gradient is constant in the entire domain, and the other is a two-layer model in which the density gradient changes at an altitude of 11 km. In the both models stream lines at high altitude descend greatly toward the ground along the lee side of the mountain as the atmospheric stability increases. However, in the two-layer model, trapped mountain waves become stronger than those in the one-layer model, and rotors are also generated on the ground. These become stronger for larger mountain width, and the scalar concentration rapidly diffuses there. It is found that the ground scalar concentrations for the two-layer model are generally much larger, especially in the rotors, compared with those in the one-layer model.
URI: http://hdl.handle.net/2297/3730
関連URI: http://dx.doi.org/10.1299/jsmeb.49.576
資料種別: Journal Article
出現コレクション:1. 査読済論文

このアイテムを引用あるいはリンクする場合は次の識別子を使用してください。 http://hdl.handle.net/2297/3730



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