3D Numerical Simulation of Dam-Break Flows with Sediment Transport over Movable Bed using Mike 3 Flow Model FM

Document Type : Original Article

Authors

1 Assistant professor of water engineering, Urmia University., Urmia., Iran

2 Ph.D. Student of Hydraulic Structures, Urmia University, Urmia, Iran.

Abstract

Dam-break flows can erode, transport and deposit sediment particles and create severe morphological problems such as significant alternations to river channel, banks, and floodplains, devastating scour around hydraulic structures and so on. Therefore, the interactions between flow, sediment transport, and channel morphology have raised a strong motivation to study dam-break flows on movable beds. In this research Mike 3 Flow Model FM have been used to simulate dam-break flows with sediment transport over movable beds. The model is finally tested using a benchmark experiments carried out in a sudden-expanded flume to investigate the partial dam-break flow over movable beds. The simulation results of water level and bed changes are in reasonably good agreement with the experimental measured data. Comparison between experimental and numerical results revealed that the Mike 3 Flow Model FM able to predict dam-break flows, erosion, and sedimentation process at the downstream of the dam. Also, the present research showed that the parameters such as flow depth, flood domain, spread time of flood wave and time series of velocity correctly simulated by mentioned model. Moreover, the present results reveal that the mentioned 3D model improves the accuracy of calculated morphological changes at the initial stages of dam-break flow, near the wave front.

Keywords

References

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Iranian Journal of Irrigation & Drainage
Volume 11, Issue 6 - Serial Number 66
March and April 2018
Pages 1038-1048

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