Determining Candidate Particles with Centroid DT Method in RM-PTV

doi:10.7652/xjtuxb201301016

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Determining Candidate Particles with Centroid DT Method in RM-PTV

更新时间：2025-07-09

- Determining Candidate Particles with Centroid DT Method in RM-PTV
- Vol. 47, Issue 1, Pages: 80-84(2013)
- 作者机构：
  
  西安交通大学流体机械及工程系,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201301016
  CLC： X169;O359
- Online First：10 January 2013，
  
  Published：2013
- 稿件说明：
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Determining Candidate Particles with Centroid DT Method in RM-PTV[J]. 2013, 47(1): 80-84.
DOI：

Determining Candidate Particles with Centroid DT Method in RM-PTV[J]. 2013, 47(1): 80-84. DOI： 10.7652/xjtuxb201301016.

摘要

为提高松弛迭代粒子追踪测速法(RM-PTV)提取瞬态流场的便捷性

提出了一种形心Delaunay 三角剖分(DT)方法

并用其代替固定阈值法来选取与目标粒子预匹配的候选粒子

以降低RM-PTV对待测流场特性的依赖。通过对典型流型的自定义及标准人工粒子流场图像的匹配计算进行全面、有效地验证表明: 形心DT网格可有效、便捷地选取候选粒子

保证RM-PTV得到准确的匹配结果

兼顾匹配准确率和效率

省去流场速度的预先估计

减小算法对流场及具体粒子分布情况的依赖

使RM-PTV更独立

应用更方便。

Abstract

To improve the convenience of the relaxation based particle tracking velocimetry(RM-PTV)in obtaining the instantaneous flow structure

a centroid Delaunay triangulation(DT)based technique was proposed to determine candidate particles for the target particles in the matching process

and typical self-defined particle images and standard particle images were analyzed to test the validity of the new method. The results show that the centroid DT method can select the candidate particles effectively and conveniently. Moreover

consideration is given to balance accuracy and efficiency

and the previous estimation of the flow field can be avoided

which makes the application of RM-PTV more independent

especially for the complicated flow situation and inexperienced users.

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references

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