Application of the VORTFIND algorithm for the identification of vortical flow features around complex three‐dimensional geometries
Application of the VORTFIND algorithm for the identification of vortical flow features around complex three‐dimensional geometries
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应用 VORTFIND 算法识别复杂三维几何形状周围的涡流特征
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
S. Turnock
中科院分区：
文献类型：
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作者：
A. Phillips;S. Turnock
使用雷诺平均Navier-Stokes模拟准确预测作用在操纵海洋航行器上的水动力和力矩需要足够的网格分辨率来捕获离体涡结构。由于这些结构的路径是未知的先验，涡识别和捕获策略，需要旁边的迭代网格自适应过程。描述了VORTFIND算法的改进版本，该算法可以使用K均值算法识别可变强度和旋转方向的多个涡流。将该算法应用于雷诺平均Navier-Stokes模拟生成的速度场，以提高涡核区域的网格分辨率，确保足够的网格密度来捕捉潜艇船体在漂移和船舶螺旋桨-舵相互作用时的涡的下游传播。Copyright © 2012 John Wiley & Sons，Ltd.
Accurate prediction of the hydrodynamic forces and moments acting on a manoeuvring marine vehicle using Reynolds averaged Navier–Stokes simulations requires sufficient mesh resolution to capture off‐body vortical structures. Because the path of these structures is not known a priori, a vortex identification and capture strategy is required alongside an iterative mesh adaption process. An improved version of the VORTFIND algorithm, which can identify multiple vortices of variable strength and rotational direction using a K‐means algorithm is described. The algorithm is applied to velocity fields generated from Reynolds averaged Navier–Stokes simulations to increase the mesh resolution in the vortex core region, ensuring sufficient mesh density to capture the downstream propagation of the vortex for a submarine hull at drift and ship propeller–rudder interaction.Copyright © 2012 John Wiley & Sons, Ltd.