Two Dimensional Analytical Solution for a Partially Vegetated Compound Channal Flow

HUAN Wen-xin; XU Zhi-gang; YANG Zhong-hua; ZENG Yu-hong

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Article Navigation > Applied Mathematics and Mechanics > 2008 > 29(8): 976-982

HUAN Wen-xin, XU Zhi-gang, YANG Zhong-hua, ZENG Yu-hong. Two Dimensional Analytical Solution for a Partially Vegetated Compound Channal Flow[J]. Applied Mathematics and Mechanics, 2008, 29(8): 976-982.

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Two Dimensional Analytical Solution for a Partially Vegetated Compound Channal Flow

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, P. R. China

Received Date: 2007-10-12
Rev Recd Date: 2008-07-14
Publish Date: 2008-08-15

Abstract

Abstract

The theory of eddy viscosity model is applied to the study of the flow in compound charurel which was partially vegetated.The governing equation was constituted by analyzing the longitudinal forces acted on the unit volume where the effect of the vegetation to the flow is considered as the drag force item.The compound channel was divided into 3 sub-regions in transverse direction,and the weffcients in every region's differential equations were solved simultaneously.Thus the analytical solulion of the transverse distribution of the depth-averaged velocity for uniform flow in partially vegetated compound channel is got.The results can also be used to predict the transverse distribution of the bed shear stress which has an important effect on the transportation of sediment.by comparing the analytical results with the measured data,the analytical solution was prnved to be sufficiently accurate to predict most hydraulic features for engineering design purpose.
- compound channel,
- depth-averaged velocity,
- drag force,
- eddy viscosity model,
- analytical solution,
- vegetation

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References(10)

References

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