Generalized thick strip modelling for vortex-induced vibration of long flexible cylinders
Generalized thick strip modelling for vortex-induced vibration of long flexible cylinders
复制标题
长柔性圆柱体涡激振动的广义厚带建模
DOI：
10.1016/j.jcp.2016.05.062
复制
发表时间：
2015-11
影响因子：
4.1
通讯作者：
Sherwin, S.
中科院分区：
文献类型：
--
作者：
Bao, Y.;Palacios, R.;Graham, M.;Sherwin, S.
我们提出了一种广义条带建模方法，计算效率高的三维不可压缩流中的长柔性圆柱体的涡激振动预测。为了克服传统的基于条带理论的2D模型的缺点，流体域被划分为“厚”条带，其足够厚以局部地解决小尺度湍流效应和围绕圆柱的流动的三维性。该模型的一个吸引人的特点是，我们独立地构建了一个三维尺度分辨模型的个别条带，其中有局部展向尺度沿着圆柱的轴向方向和耦合，只有通过结构模型的圆柱。因此，这种方法能够覆盖从完全解析的3D建模到2D条带理论的全谱。这些条带之间的连接是通过计算张紧梁方程来实现的，该方程用于表示柔性体的动力学。然而，在极限情况下，单个“厚”条将填充整个3D域。采用并行傅立叶谱/hpelement方法求解条域内的三维流场，通过条-结构相互作用实现涡激振动响应的预测。层流和湍流的数值试验，以及与完全解决DNS的比较，以证明这种方法的适用性。
We propose a generalized strip modelling method that is computationally efficient for the VIV prediction of long flexible cylinders in three-dimensional incompressible flow. In order to overcome the shortcomings of conventional strip-theory-based 2D models, the fluid domain is divided into “thick” strips, which are sufficiently thick to locally resolve the small scale turbulence effects and three dimensionality of the flow around the cylinder. An attractive feature of the model is that we independently construct a three-dimensional scale resolving model for individual strips, which have local spanwise scale along the cylinder's axial direction and are only coupled through the structural model of the cylinder. Therefore, this approach is able to cover the full spectrum for fully resolved 3D modelling to 2D strip theory. The connection between these strips is achieved through the calculation of a tensioned beam equation, which is used to represent the dynamics of the flexible body. In the limit, however, a single “thick” strip would fill the full 3D domain. A parallel Fourier spectral/hpelement method is employed to solve the 3D flow dynamics in the strip-domain, and then the VIV response prediction is achieved through the strip–structure interactions. Numerical tests on both laminar and turbulent flows as well as the comparison against the fully resolved DNS are presented to demonstrate the applicability of this approach.
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影响因子：
4.1
作者：
G. Karamanos;G. Karniadakis
通讯作者：
G. Karamanos;G. Karniadakis
影响因子：
3.6
作者：
J. Chaplin;P. Bearman;Y. Cheng;E. Fontaine;J. Graham;K. Herfjord;F. J. H. Huarte;M. Isherwood;K. Lambrakos;C. M. Larsen;J. Meneghini;G. Moe;R. Pattenden;M. Triantafyllou;R. Willden
通讯作者：
J. Chaplin;P. Bearman;Y. Cheng;E. Fontaine;J. Graham;K. Herfjord;F. J. H. Huarte;M. Isherwood;K. Lambrakos;C. M. Larsen;J. Meneghini;G. Moe;R. Pattenden;M. Triantafyllou;R. Willden
影响因子：
3.7
作者：
R. Bourguet;G. Karniadakis;M. Triantafyllou
通讯作者：
R. Bourguet;G. Karniadakis;M. Triantafyllou
DOI：
10.1115/omae2009-80002
发表时间：
2009
期刊：
--
影响因子：
--
作者：
Y. Constantinides;O. H. Oakley
通讯作者：
Y. Constantinides;O. H. Oakley
影响因子：
4.7
作者：
X. Q. Wang;R. So;K. Chan
通讯作者：
X. Q. Wang;R. So;K. Chan