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Slurry conveying characteristics of coarse particles in vertical hydraulic slag discharge system.

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Title: Slurry conveying characteristics of coarse particles in vertical hydraulic slag discharge system.
Authors: Zhu, Qiheng1 (AUTHOR), Ma, Fei1 (AUTHOR), Liu, Boshen1 (AUTHOR) liuboshen@ustb.edu.cn, Yao, Man1,2 (AUTHOR), Kang, Yuchen1 (AUTHOR), Zhong, Yuqian1 (AUTHOR), Pan, Yan1 (AUTHOR)
Source: Physics of Fluids. Aug2026, Vol. 38 Issue 8, p1-11. 11p.
Subject Terms: *Viscosity, *Particle dynamics analysis, *Two-phase flow, *Rheology, *Bulk solids, *Slurry
Abstract: This study investigates the transport mechanisms of coarse particles within vertical solid–liquid two-phase flows, focusing on the influence of fluid rheological properties on particle dynamics. A series of experiments were conducted to evaluate the kinematic behavior of large-scale particles across a wide range of fluid viscosities. To achieve high-precision kinematic measurements, an unsupervised learning algorithm integrated with simple linear iterative clustering superpixel segmentation was developed for robust particle identification and velocity tracking. The experimental results reveal a distinct three-stage evolution of the particle absolute velocity—defined as the particle acceleration stage, the efficient transport stage, and the transport suppression (TS) stage—as the fluid viscosity increases. This trend is fundamentally governed by the balance between enhanced slurry-carrying capacity and increased hydraulic resistance. Concurrently, the slip velocity between the solid and liquid phases undergoes a significant reduction with increasing viscosity, indicating enhanced interphase synchronization and fluid carrying capacity. By synthesizing the tradeoffs between absolute transport velocity and phase slip, a critical viscosity regime for optimal transport efficiency was identified. Furthermore, the transition between different transport regimes was further corroborated by acoustic emission measurements in practical vertical flow environments. The field data successfully captured the peak particle flux within the predicted ET stage, demonstrating the scalability of the proposed fluid–particle interaction models. This work provides a theoretical framework for optimizing vertical hydraulic slag discharge systems and offers a mechanistic basis for enhancing energy efficiency in complex viscous multiphase flows. [ABSTRACT FROM AUTHOR]
Database: Academic Search Index
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  – Url: https://resolver.ebsco.com/c/fiv2js/result?sid=EBSCO:asx&genre=article&issn=10706631&ISBN=&volume=38&issue=8&date=20260801&spage=1&pages=1-11&title=Physics of Fluids&atitle=Slurry%20conveying%20characteristics%20of%20coarse%20particles%20in%20vertical%20hydraulic%20slag%20discharge%20system.&aulast=Zhu%2C%20Qiheng&id=DOI:10.1063/5.0336373
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  Data: Slurry conveying characteristics of coarse particles in vertical hydraulic slag discharge system.
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  Data: <searchLink fieldCode="AR" term="%22Zhu%2C+Qiheng%22">Zhu, Qiheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Fei%22">Ma, Fei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Boshen%22">Liu, Boshen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> liuboshen@ustb.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Yao%2C+Man%22">Yao, Man</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kang%2C+Yuchen%22">Kang, Yuchen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhong%2C+Yuqian%22">Zhong, Yuqian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pan%2C+Yan%22">Pan, Yan</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Physics+of+Fluids%22">Physics of Fluids</searchLink>. Aug2026, Vol. 38 Issue 8, p1-11. 11p.
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  Data: *<searchLink fieldCode="DE" term="%22Viscosity%22">Viscosity</searchLink><br />*<searchLink fieldCode="DE" term="%22Particle+dynamics+analysis%22">Particle dynamics analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22Two-phase+flow%22">Two-phase flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Rheology%22">Rheology</searchLink><br />*<searchLink fieldCode="DE" term="%22Bulk+solids%22">Bulk solids</searchLink><br />*<searchLink fieldCode="DE" term="%22Slurry%22">Slurry</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study investigates the transport mechanisms of coarse particles within vertical solid–liquid two-phase flows, focusing on the influence of fluid rheological properties on particle dynamics. A series of experiments were conducted to evaluate the kinematic behavior of large-scale particles across a wide range of fluid viscosities. To achieve high-precision kinematic measurements, an unsupervised learning algorithm integrated with simple linear iterative clustering superpixel segmentation was developed for robust particle identification and velocity tracking. The experimental results reveal a distinct three-stage evolution of the particle absolute velocity—defined as the particle acceleration stage, the efficient transport stage, and the transport suppression (TS) stage—as the fluid viscosity increases. This trend is fundamentally governed by the balance between enhanced slurry-carrying capacity and increased hydraulic resistance. Concurrently, the slip velocity between the solid and liquid phases undergoes a significant reduction with increasing viscosity, indicating enhanced interphase synchronization and fluid carrying capacity. By synthesizing the tradeoffs between absolute transport velocity and phase slip, a critical viscosity regime for optimal transport efficiency was identified. Furthermore, the transition between different transport regimes was further corroborated by acoustic emission measurements in practical vertical flow environments. The field data successfully captured the peak particle flux within the predicted ET stage, demonstrating the scalability of the proposed fluid–particle interaction models. This work provides a theoretical framework for optimizing vertical hydraulic slag discharge systems and offers a mechanistic basis for enhancing energy efficiency in complex viscous multiphase flows. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1063/5.0336373
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 1
    Subjects:
      – SubjectFull: Viscosity
        Type: general
      – SubjectFull: Particle dynamics analysis
        Type: general
      – SubjectFull: Two-phase flow
        Type: general
      – SubjectFull: Rheology
        Type: general
      – SubjectFull: Bulk solids
        Type: general
      – SubjectFull: Slurry
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    Titles:
      – TitleFull: Slurry conveying characteristics of coarse particles in vertical hydraulic slag discharge system.
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            NameFull: Zhu, Qiheng
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            NameFull: Ma, Fei
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            NameFull: Liu, Boshen
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            NameFull: Yao, Man
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            NameFull: Kang, Yuchen
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            – D: 01
              M: 08
              Text: Aug2026
              Type: published
              Y: 2026
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              Value: 38
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              Value: 8
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            – TitleFull: Physics of Fluids
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