Investigation of turbulent flow induced by particle sedimentation using RIM-PIV

IF 2.4 3区 环境科学与生态学 Q2 ENGINEERING, CIVIL Journal of Hydro-environment Research Pub Date : 2024-03-16 DOI:10.1016/j.jher.2024.03.001
Eiji Harada, Takumi Tazaki, Hitoshi Gotoh
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Abstract

The spatiotemporal structure of the flow field during particle–cloud sedimentation has not been sufficiently investigated. In this study, experiments on the sedimentation process of particle clouds in water are conducted using hydrogel particles with a refractive index similar to that of water as the settling particles. The flow field during the sedimentation process of particle clouds in water is measured using particle image velocimetry (PIV). Although the measurement conditions in this study are restricted to one condition owing to the limitations of the measurable area by our PIV system and the available hydrogel particles, the measurement target is novel because it has not been measured so far. The spatiotemporal structure of the turbulent flows is investigated by analyzing the turbulent flows induced by the sedimentation particles using the PIV system. Furthermore, the turbulent structure of the vortex formed by particle sedimentation is examined.

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利用 RIM-PIV 研究颗粒沉积引起的湍流
目前对粒子云沉降过程中流场的时空结构研究还不够充分。本研究使用折射率与水相似的水凝胶颗粒作为沉降颗粒,对颗粒云在水中的沉降过程进行了实验。使用粒子图像测速仪(PIV)测量了粒子云在水中沉降过程中的流场。虽然由于我们的 PIV 系统的可测量区域和可用的水凝胶颗粒的限制,本研究的测量条件仅限于一种条件,但测量目标是新颖的,因为迄今为止还没有测量过。通过使用 PIV 系统分析沉积颗粒引起的湍流,研究了湍流的时空结构。此外,还研究了颗粒沉积形成的漩涡的湍流结构。
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来源期刊
Journal of Hydro-environment Research
Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES
CiteScore
5.80
自引率
0.00%
发文量
34
审稿时长
98 days
期刊介绍: The journal aims to provide an international platform for the dissemination of research and engineering applications related to water and hydraulic problems in the Asia-Pacific region. The journal provides a wide distribution at affordable subscription rate, as well as a rapid reviewing and publication time. The journal particularly encourages papers from young researchers. Papers that require extensive language editing, qualify for editorial assistance with American Journal Experts, a Language Editing Company that Elsevier recommends. Authors submitting to this journal are entitled to a 10% discount.
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