Hydraulic Characteristics of Continuous Micro-bend Channel: Flume Experiment and Numerical Simulation

LUO Ping-an, LI Mi

Journal of Changjiang River Scientific Research Institute ›› 2019, Vol. 36 ›› Issue (1) : 55-59.

PDF(3285 KB)
PDF(3285 KB)
Journal of Changjiang River Scientific Research Institute ›› 2019, Vol. 36 ›› Issue (1) : 55-59. DOI: 10.11988/ckyyb.20171098
HYDRAULICS

Hydraulic Characteristics of Continuous Micro-bend Channel: Flume Experiment and Numerical Simulation

  • LUO Ping-an1,2, LI Mi3
Author information +
History +

Abstract

The hydraulic characteristic of continuous micro-bend channel was researched on a continuous bend physical model with sinuosity of 1.07 and Reynolds stress model. The water line, flow velocity field, circulating flow in bend channels, and intensity were examined. Reynolds stress model is proved well simulates the flow in continuous bend. In a given section, the vertical longitudinal velocity distribution in the adjacent of convex bank approached to logarithmic distribution, while the vertical longitudinal velocity adjoining concave bank displayed a bulging shape, increasing firstly and then decreasing with the growth of relative water depth. Circulating flow in bends displayed asymmetric double circulation structure, with the flow intensity larger in the surface and bottom of flume than that in the central part, and larger at concave bank than that at convex bank.

Key words

micro-bend continuous channel / sinuosity / hydraulic characteristics / flume experiment / circulating flow intensity

Cite this article

Download Citations
LUO Ping-an, LI Mi. Hydraulic Characteristics of Continuous Micro-bend Channel: Flume Experiment and Numerical Simulation[J]. Journal of Changjiang River Scientific Research Institute. 2019, 36(1): 55-59 https://doi.org/10.11988/ckyyb.20171098

References

[1] 陈启刚, 钟 强, 李丹勋, 等. 明渠弯道水流平均运动规律试验研究[J]. 水科学进展, 2012, 23(3): 369-375.
[2] DE VRIEND H J. A Mathematical Model of Steady Flow in Curved Shallow Channels[J]. Journal of Hydraulic Research, 1977, 15(1): 37-54.
[3] 李义天,谢鉴衡.冲积平原河流平面流动的数值模拟[J].水利学报,1986,(11):14-20.
[4] 董耀华.弯道水流的基本特性及数值模拟[J].长江科学院院报,1996,13(1):25-29.
[5] 杨燕华, 白玉川. 连续弯道水流运动的三维数值模拟[J]. 泥沙研究, 2012, (6): 46-49.
[6] STOESSER T, RUETHER N, OLSEN N R B. Calculation of Primary and Secondary Flow and Boundary Shear Stresses in a Meandering Channel[J]. Advances in Water Resources, 2010, 33(2): 158-170.
[7] 陈翠霞.弯曲及顺直型河道水流三维数值模拟研究[D].武汉:武汉大学,2011.
[8] CHEN D, TANG C. Evaluating Secondary Flows in the Evolution of Sine-generated Meanders[J]. Geomorphology, 2012, 163: 37-44.
[9] 童思陈,高 建,许光祥. 弯道水流纵向垂线平均流速分布的计算[J]. 重庆交通大学学报(自然科学版),2009,28(1):126-129.
PDF(3285 KB)

Accesses

Citation

Detail

Sections
Recommended

/