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Lin Junqiang, Yan Zhongmin, Xia Jihong. DISTURBED PRESSURE DISTRIBUTION ALONG SLIGHTLY CURVED BANKLINE BASED ON SMALL-DISTURBANCE THEORY[J]. Chinese Journal of Theoretical and Applied Mechanics, 2013, 45(3): 337-342. DOI: 10.6052/0459-1879-12-173
Citation: Lin Junqiang, Yan Zhongmin, Xia Jihong. DISTURBED PRESSURE DISTRIBUTION ALONG SLIGHTLY CURVED BANKLINE BASED ON SMALL-DISTURBANCE THEORY[J]. Chinese Journal of Theoretical and Applied Mechanics, 2013, 45(3): 337-342. DOI: 10.6052/0459-1879-12-173
shu

DISTURBED PRESSURE DISTRIBUTION ALONG SLIGHTLY CURVED BANKLINE BASED ON SMALL-DISTURBANCE THEORY

  • College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

Funds: The project was supported by the National Natural Science Foundation of China, the Hydraulic Science and Technology Project of Zhejiang Province (RA1104) and the Sciences and Innovation Project for College Graduates in Jiangsu Province (CX10B-212Z).
  • Received Date: June 05, 2012
  • Revised Date: December 12, 2012
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    • Abstract
  • In order to reveal the discipline and the main influence factor of disturbed pressure distribution along sinuous bankline, the small disturbance theory was used to linearize the 2D shallow water equations and the boundary conditions. Analytic expressions of disturbed pressure along sinusoidal curved bankline had been derived. A sensitivity analysis of influence factors was also presented. The pressure expressions and sensitivity analysis show that the disturbed pressure along the slightly curved bankline follows sinusoidal distribution. The crest and trough values of disturbed pressure appear at the maximum curvature locations of concave and convex bank, respectively. The bank amplitude-to-wavelength ratio a/λ is found to be the main factor of pressure variation in subcritical flow. The derived results can be used to estimate the boundary condition of stream-subsurface exchange in riparian zones, which is helpful to the further study on lateral hyporheic exchange and hydrodynamics in riparian areas.
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    • References (19)
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