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Secondary Flow Structure near Side Wall Region of Backward-facing Step in Open Channel Flow
| Content Provider | Semantic Scholar |
|---|---|
| Author | Watanabe, Katsutoshi Saga, Takanori Gamou, Ryou Abe, Ikki |
| Copyright Year | 2014 |
| Abstract | Characteristics of secondary flow structure near side wall region of backward-facing step in open channel flow are investigated using velocity measurements and flow visualization techniques. The secondary flow structure near the side wall region before the step is composed of two rotational flows that the rotation direction is different each other on the side wall and the bottom wall. Whereas after the step these rotational flows disappear and change to lateral and downward flow and then the rotational flow on the side wall regenerates and develop faster than one of the bottom wall. The results of flow visualization indicate that streamwise vortex is formed on the side wall and the bottom wall before the step and the scale of streamwise vortex on the side wall becomes small according to diminish of streamwise vortex on the bottom wall after the step. Furthermore, the result of DPTV (Dye-streak pattern Particle Tracking Velocimetry) shows that streamwise vortex contributes to generating instantaneous secondary flow. |
| File Format | PDF HTM / HTML |
| DOI | 10.2208/jscejhe.70.I_703 |
| Alternate Webpage(s) | https://www.jstage.jst.go.jp/article/jscejhe/70/4/70_118/_pdf/-char/en |
| Alternate Webpage(s) | https://doi.org/10.2208/jscejhe.70.I_703 |
| Volume Number | 70 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
