Upstream Flow Characteristics Influenced by Gap Backwater in Wide and Narrow Alternated Channels in Mountainous Areas
- DOI
- 10.2991/cmfe-15.2015.112How to use a DOI?
- Keywords
- wide and narrow alternated channel; backwater; Velocity distribution; bed shear stress; three dimensional flow field
- Abstract
This paper chooses the wide and narrow alternated channel in upstream of Baoxing River as the research object, establishes a three-dimensional flow calculation model and studies the effects of gap backwater on flow characteristics of the water in upstream channel under different conditions. The results show that there is backflow along both sides of the mainstream in upstream of gap because of the water-resistance effects of gap. With the increase of flow rate, backflow presses the mainstream, so that cross-sectional velocity distribution in wide section becomes more uniform; at the section not affected by the backwater, as the flow increases, the bed shear stress increases, and the peak is distributed in the middle of the channel region; when the flow rate further increases, under the effect of the backflow and the backwater, the bed shear stress at the middle region of wide section tends to decrease first and then increase. And velocity and bed shear stress distribution in the cross section has significant peaks within a certain flow range.
- Copyright
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Hu Lin AU - Shuting Miao AU - Yun Zeng PY - 2015/07 DA - 2015/07 TI - Upstream Flow Characteristics Influenced by Gap Backwater in Wide and Narrow Alternated Channels in Mountainous Areas BT - Proceedings of the International Conference on Chemical, Material and Food Engineering PB - Atlantis Press SP - 482 EP - 484 SN - 2352-5401 UR - https://doi.org/10.2991/cmfe-15.2015.112 DO - 10.2991/cmfe-15.2015.112 ID - Lin2015/07 ER -