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首页> 外文期刊>Central European Journal of Physics >A parallel three-dimensional scour model to predict flow and scour below a submarine pipeline
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A parallel three-dimensional scour model to predict flow and scour below a submarine pipeline

机译：并行的三维冲刷模型，用于预测海底管道下方的流量和冲刷

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摘要

A three-dimensional Lattice Boltzmann flow and scour model is developed to simulate time-dependent scour below a submarine pipeline. The proposed model presented in this paper is able to predict streamwise and spanwise propagations of scour with respect to lattice unit of time. It is evident from this study that the existence of a spiral vortex in the proximity of the span shoulder is quite noteworthy. It is revealed that the critical regime of the 2-D scour process is found to be up to one pipe diameter away in both directions from the middle of the unsupported length of pipelines. The equilibrium maximum scour depth and the shape of streamwise equilibrium scour hole compare well with the available experimental data. The speed of propagation of scour along the pipeline length maintains an almost constant rate, which is consistent with the experimental observations found in literature. In addition, it is seen that the scour slope at the shoulder region remains fairly constant throughout the whole scour process.
机译：建立了三维格子玻尔兹曼流量和冲刷模型，以模拟海底管道下方随时间变化的冲刷。本文提出的模型能够相对于时间格单元预测冲刷的沿流向和跨向传播。从这项研究中可以明显看出，在跨肩附近存在螺旋涡旋是非常值得注意的。结果表明，二维冲刷过程的关键机制是从无支撑的管道长度的中间到两个方向的最大管道直径。平衡最大冲刷深度和流向平衡冲刷孔的形状与可用的实验数据进行了很好的比较。沿管道长度的冲刷传播速度几乎保持恒定，这与文献中的实验观察结果一致。另外，可以看出，在整个冲刷过程中，肩部区域的冲刷斜率保持相当恒定。

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