Novel method for measuring interface behavior and flow parameters in bubble-particle detachment using PIV-LIF and machine learning image segmentation

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-06-11 DOI:10.1016/j.powtec.2025.121245

Shihao Ding , Qinglin Yin , Wenqing Shi , Youfei Zhang , Qi He , Xiahui Gui , Yaowen Xing

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引用次数: 0

Abstract

Turbulence is a critical factor inducing bubble-particle detachment, and investigating this mechanism is crucial for improving the flotation recovery of coarse particles. However, current research is constrained by the lack of synchronous measurement methods, causing most studies to analyze interface behavior and flow parameters separately, thereby limiting comprehensive insights into detachment processes. This study presents a novel method combining particle image velocimetry (PIV) and laser-induced fluorescence (LIF) with machine learning-based image segmentation to investigate detachment mechanisms in shear flow fields. The results demonstrate that this method enables real-time measurement of bubble-particle detachment while simultaneously capturing interface behavior and flow parameters. Furthermore, the study elucidates the shear detachment mechanism: lateral vortices dominate bubble deflection, whereas forward shear flow plays a crucial role in bubble detachment. This work provides a new method for bubble-particle detachment research and advances the understanding of turbulence-induced detachment mechanisms.

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基于PIV-LIF和机器学习图像分割的气泡-颗粒分离界面行为和流动参数测量新方法

湍流是诱导气泡颗粒脱离的关键因素，研究其机理对提高粗颗粒浮选回收率具有重要意义。然而，目前的研究受到缺乏同步测量方法的限制，导致大多数研究分别分析界面行为和流动参数，从而限制了对脱离过程的全面了解。本文提出了一种结合粒子图像测速（PIV）和激光诱导荧光（LIF）以及基于机器学习的图像分割方法来研究剪切流场中分离机制的新方法。结果表明，该方法能够实时测量气泡-颗粒分离，同时捕获界面行为和流动参数。此外，研究还阐明了剪切分离的机制：侧向涡主导了气泡的偏转，而正向剪切流在气泡分离中起关键作用。这项工作为研究气泡-颗粒分离提供了一种新的方法，并促进了对湍流诱导分离机制的认识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.