Author(s): Yuchuan Bai; Hanbao Chen
Linked Author(s):
Keywords: River evolution; Meandering rivers; Braided rivers; Model experiments
Abstract: In this paper, the flow field and bed morphology were studied in river bends of constant curvature, established a river centerline as the horizontal axis, the direction of the longitudinal axis of the river cross-section of the river's natural flow movement coordinate system equations. Through the equation along the depth-integrated and use interpolation function, the establishment of a quasi-three-dimensional external mode equations. And magnitude through dimensionless analysis, hydrodynamic and channel morphology selected control parameters, using perturbation method, derived river bends of constant curvature flow and bed morphology (topography) of the zero-order and first-order solution, and the paper analyzes results and Jhannesson, H. et al theoretical results and relevant experimental data for comparison, Jhannesson, H et al study results reflect the two-dimensional case, and this article has been three-dimensional flow structure solution bend section, we study the actual situation results match the actual flow, can be more accurate description of the flow velocity curve of constant curvature distribution and topography, especially in the case of high Reynolds number can better match with the actual situation.
Year: 2013