Plasma and Fusion Research

Volume 18, 1402058 (2023)

Regular Articles

A Comparison of Velocimetry Algorithms: Orthogonal Dynamic Programming Based Particle Image Velocimetry Versus Local Correlation Tracking
Tatsuya KOBAYASHI1,2), Ryohtaroh T. ISHIKAWA3,4), Motoki NAKATA1,2), Takayoshi OBA3) and Yukio KATSUKAWA3)
1)
National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
2)
The Graduate University for Advanced Studies, SOKENDAI, Toki 509-5292, Japan
3)
National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
4)
Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8603, Japan
(Received 1 May 2023 / Accepted 31 May 2023 / Published 14 July 2023)

Abstract

In the magnetic plasma fusion community and the solar physics research community, different velocimetry algorithms have been used. Those are: orthogonal dynamic programing based particle image velocimetry (ODP-PIV) and local correlation tracking (LCT), respectively. In this paper, a systematic comparison of these velocimetry codes is performed using synthetically produced turbulence data. The spatial scale of a typical turbulence pattern is scanned to examine the sensitivity of these codes on the tracer pattern property. Use of an LCT code is recommended when the ratio of the turbulence pattern size to the spatial resolution is small.

Keywords

plasma turbulence, magnetic fusion plasma, solar physics, velocimetry, orthogonal dynamic programming, local correlation tracking

DOI: 10.1585/pfr.18.1402058

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