Author(s): Y. Xu; S. S. Y. Wang; Y. Jia
Linked Author(s):
Keywords: Numerical modeling; Curved channel; Helical flow; Submerged dike
Abstract: Flow in a curved channel is characterized by a secondary helical flow due to centrifugal force. The helical flow makes river navigation difficult and causes critical bank erosion. Submerged dikes built along the outer bank of the curved channel realigns the surface flow to improve navigation. A series of numerical simulations demonstrated that the helical flow in the curved channel was significantly affected by submerged dike characteristics, such as dike length, height, side slop and angle between the dike and the radial line of the curved channel. The angle plays an important role in realigning surface flow. The effective dikeblocking area and location of the dike tip related to the dike angel had considerable impact on flow structure. An appropriately angled submerged dike can maximize surface flow realignment for improving navigation conditions
Year: 2003