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首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >An automated vortex detection scheme using the wavelet transform of the d(2) field
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An automated vortex detection scheme using the wavelet transform of the d(2) field

机译:使用d(2)场的小波变换的自动涡旋检测方案

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摘要

A vortex detection scheme using the wavelet transform of the discriminant of the eigenvalues of the velocity gradient matrix (d(2)) is presented in this paper. The use of d(2) field results in better eduction capability over the previously used test fields such as enstrophy since it automatically distinguishes shear layers from vortices. Level sets are used to refine the shape of the vortex without causing a huge computational penalty. Further, the algorithm is easily automated to aid batch processing. The detection scheme was applied to swirl flow fields, successfully estimating the vortex location, the core radius and the vortex shape.
机译:提出了一种利用小波变换对速度梯度矩阵特征值(d(2))进行判别的涡流检测方案。 d(2)场的使用比以前使用的测试场(如enstrophy)具有更好的发射能力,因为它可以自动区分剪切层和涡旋。水平集用于精炼涡流的形状而不会造成巨大的计算损失。此外,该算法易于自动化以帮助批处理。该检测方案被应用于旋流场,成功地估计了旋涡的位置,核心半径和旋涡形状。

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