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首页> 外文会议>25th International Conference on Offshore Mechanics and Arctic Engineering 2006(OMAE2006) vol.4 >Simulation of Riser VIV Using Fully Three Dimensional CFD Simulations
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Simulation of Riser VIV Using Fully Three Dimensional CFD Simulations

机译：使用完整三维CFD模拟的Riser VIV模拟

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Fully three dimensional computational fluid dynamics (CFD) solutions are combined with structural models of a tensioned riser to predict riser vortex induced motion. The use of three dimensional CFD solutions overcomes many of the shortcomings of combining a series of strip or two dimensional simulations to calculate the fluid forces on the riser. Three dimensional vortex structures are treated correctly and staked risers and variations in angle of attack can be studied directly. The proposed method uses finite element methods that are tolerant of sparse meshes and high element aspect ratios. This allows economical solutions of large fluid domains while retaining the important features of the large fluid vortex structures which drive risers. Long risers can be treated with readily available computers and examples of simulations of riser with L/D over 1400 are given and compared with previously published experimental data. These examples are used to illustrate several points regarding the effects of the treatment of the riser structure as well as the efficacy of rotating frame or pinned riser experiments used to simulate sheared currents. The method can also be extended to sheared currents whose heading varies with depth.
机译：完整的三维计算流体动力学（CFD）解决方案与张紧式立管的结构模型相结合，以预测立管涡旋引起的运动。三维CFD解决方案的使用克服了将一系列带状或二维模拟结合起来以计算立管上的流体力的许多缺点。正确处理了三维涡结构，可以直接研究桩的立管和迎角的变化。所提出的方法使用了有限稀疏网格和高元素长宽比的有限元方法。这允许经济地解决大型流体域，同时保留驱动立管的大型流体涡旋结构的重要特征。长立管可以用现成的计算机进行处理，给出了L / D超过1400的立管模拟示例，并将其与以前发布的实验数据进行了比较。这些示例用于说明有关立管结构处理效果以及用于模拟剪切电流的旋转框架或固定立管实验效果的几点。该方法也可以扩展到航向随深度变化的剪切电流。

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