濁流沉積的CFD模型

Simulation of the flow and deposition from a laboratory turbidity current, in which dense mixtures of sediment move down a narrow, sloping channel and flow into a large tank. SSHM CFD software is used to model 3-D flow and deposition. SSIIM predicts the height of the accumulated mound to within 25% of experimental values, and the volume of the mound to 20%～50%, depending on the concentration of sediment and slope of the channel. The SSIIM predictions were consistently lower than experimental values. In simulations with initial sediment volumetric concentrations greater than 14%, SSIIM dumped some of the sediment load at the entry gate into the channel, which was not the case with the experimental runs. This is likely due to the fact that the fall velocity of sediment particles in SSIIM does not vary with sediment concentration. Further simulations of deposition from turbidity currents should be attempted when more complete experimental results are available, but it appears for now that SSIIM can be used to give approximate estimates of turbidity current deposition.

作 者： Sergio Perez Sergio Perez   作者單位：   刊 名： 船舶與海洋工程學報（英文版）  英文刊名： JOURNAL OF MARINE SCIENCE AND APPLICATION  年，卷(期)： 2010 9(1)  分類號： U6  關鍵詞： sediment   turbidity current   computational fluid dynamics   SSIIM   density current  

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