土木学会論文集B1(水工学)
Online ISSN : 2185-467X
ISSN-L : 2185-467X
水工学論文集第60巻
側壁・底面粗度の相違が第一種二次流に与える影響に関する数値実験的検討
八軒 啓彰朝位 孝二渡辺 勝利
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2016 年 72 巻 4 号 p. I_499-I_504

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 In this study, we conducted numerical experiments to investigate the influence of the wall and bed roughness to the secondary flow in a bend part in open channel flows. The nays CUBE distributed by the iRIC project was used in this study. Firstly we conformed that the nays CUBE has good accuracy to predict the three dimensional flow by comparing with our laboratory experimental data.
 We conducted numerical experiments under the five cases. In the cases that the wall roughness is smaller than or equal to the bed roughness, the circulation near the inner bank wall became bigger as the side wall roughness increased in the entrance of the bend part. On the other hand, in the cases that the wall roughness is greater than the bed roughness, the circulations near the outer bank wall were not clear at the middle of the bend part.

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© 2016 公益社団法人 土木学会
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