A NOVEL EXPLICIT-IMPLICIT COUPLED SOLUTION METHOD OF SWE FOR LONG-TERM RIVER MEANDERING PROCESS INDUCED BY DAMBREAK

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ZHENG X.G.; PU J.H.; CHEN R.D.; LIU X.N.; SHAO S.D.

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Journal: JOURNAL OF APPLIED FLUID MECHANICS (JAFM) Year:2016 | Volume:9 | Issue:6 Page(s): 2647-2660

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Title

A NOVEL EXPLICIT-IMPLICIT COUPLED SOLUTION METHOD OF SWE FOR LONG-TERM RIVER MEANDERING PROCESS INDUCED BY DAMBREAK

Author(s)

Keywords

SWE

EXPLICIT-IMPLICIT COUPLED

DAM BREAK

EULERIAN-LAGRANGIAN

RIVER MEANDERING

Abstract

Large amount of sediment deposits in the reservoir area can cause DAM BREAK, which not only leads to an immeasurable loss to the society, but also the sediments from the reservoir can be transported to generate further problems in the downstream catchment. This study aims to investigate the short-to-long term sediment transport and channel meandering process under such a situation. A coupled explicit-implicit technique based on the Euler-Lagrangian method (ELM) is used to solve the hydrodynamic equations, in which both the small and large time steps are used separately for the fluid and sediment marching. The main feature of the model is the use of the Characteristic-Based Split (CBS) method for the local time step iteration to correct the ELM traced lines. Based on the solved flow field, a standard Total Variation Diminishing (TVD) finite volume scheme is applied to solve the sediment transportation equation. The proposed model is first validated by a benchmark dambreak water flow experiment to validate the efficiency and accuracy of ELM modelling capability. Then an idealized engineering dambreak flow is used to investigate the long-term downstream channel meandering process with non-uniform sediment transport. The results showed that both the hydrodynamic and morphologic features have been well predicted by the proposed coupled model.

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APA: Copy

ZHENG, X.G., PU, J.H., CHEN, R.D., LIU, X.N., & SHAO, S.D.. (2016). A NOVEL EXPLICIT-IMPLICIT COUPLED SOLUTION METHOD OF SWE FOR LONG-TERM RIVER MEANDERING PROCESS INDUCED BY DAMBREAK. JOURNAL OF APPLIED FLUID MECHANICS (JAFM), 9(6), 2647-2660. SID. https://sid.ir/paper/307844/en

Vancouver: Copy

ZHENG X.G., PU J.H., CHEN R.D., LIU X.N., SHAO S.D.. A NOVEL EXPLICIT-IMPLICIT COUPLED SOLUTION METHOD OF SWE FOR LONG-TERM RIVER MEANDERING PROCESS INDUCED BY DAMBREAK. JOURNAL OF APPLIED FLUID MECHANICS (JAFM)[Internet]. 2016;9(6):2647-2660. Available from: https://sid.ir/paper/307844/en

IEEE: Copy

X.G. ZHENG, J.H. PU, R.D. CHEN, X.N. LIU, and S.D. SHAO, “A NOVEL EXPLICIT-IMPLICIT COUPLED SOLUTION METHOD OF SWE FOR LONG-TERM RIVER MEANDERING PROCESS INDUCED BY DAMBREAK,” JOURNAL OF APPLIED FLUID MECHANICS (JAFM), vol. 9, no. 6, pp. 2647–2660, 2016, [Online]. Available: https://sid.ir/paper/307844/en

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