发布时间：2023-04-24

文章标题：【学术成果】一篇通讯作者文章在国际学术期刊 Measurement 上发表

内容：

我们基于两种拓扑椭球结构发展出一种新的三维粒子追踪算法~

Cited as: Lin YW, Zhang Y, Jin YQ, Guan KY, Ma QM, Cui YT, Yang B. Three-dimensional particle tracking algorithm based on the special ellipsoids. Measurement, 2023, 216: 112883. https://doi.org/10.1016/j.measurement.2023.112883

Abstract: A 3D PTV algorithm based on the minimum volume enclosing ellipsoid (MVEE) and the inertia-equivalent ellipsoid (IEE) is proposed. Firstly, different versions of this algorithm are proposed by incorporating the features of MVEE and Voronoi polyhedron through weighted summation. Secondly, according to the test by homemade particle flows, among these versions, the Voronoi polyhedron feature expressed by IEE has the best performance, thus leading to a completely ellipsoid-based version named E-PTV. Thirdly, a series of tests and analyses are conducted to compare E-PTV with some classical and newly developed 3D PTV algorithms. The results show that, E-PTV is parameter-independent and optimally efficient in addition to being close to these algorithms in accuracy. Finally, combining E-PTV with the volumetric 3-component velocimetry (V3V) system successfully reconstructs an actual 3D vortex ring flow, thereby confirming the practicality of E-PTV.

 

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Fig. Vortex ring experiment and reconstruction. (a) Schematic, where the direction of pushing a syringe to generate the vortex ring is denoted by a yellow arrow. (b) Instantaneous flow field reconstructed by E-PTV. (c) Side view of the selected flow field. Isosurface of the vortex ring reconstructed by (d) E-PTV and (e) NRX.