Author(s): Mao Ze-Yu; Zhao Xue-Feng; Wang Ai-Min; Xu Xin; Wu Jian-Jiang
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Keywords: No keywords
Abstract: River ice is a kind of natural phenomena in the cold region under specific conditions of meteorology, geomorphology and hydraulics. In order to simulate accurately the complicated boundary conditions and overcome the problems caused by wide gap of scale between length and width, a 2-D river-ice numerical model based upon the boundary-fitted method has been developed, considering the influence of the frazil ice accumulating under ice cover and the shape of freezing fringe of ice cover during the river-ice processing etc. The presented model is capable of determining the velocity field, distribution of water temperature, concentration distribution of the frazil ice, transportation of the floating ice, progression, stability and thaw of ice cover, transportation, accumulation and erosion of ice under ice cover. MacCormack scheme is used to solve numerically the equations. The model is validated by the field observations at Hequ Reach of the Yellow River, and the comparison results show that the 2-D numerical model presented is capable of simulating the river-ice process with high accuracy.
Year: 2008