Advances in Multi-phase Flow: Symmetry, Asymmetry, and Applications

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 1770

Special Issue Editors


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Guest Editor
State Key Laboratory of Hydro Science and Engineering & Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
Interests: multi-phase flow; hydraulic machinery; tidal energy; energy storage; multiphysics coupling
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Guest Editor
Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Interests: hydrodynamics simulation; pump-turbine; tidal energy; multi-phase flow
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Guest Editor
College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225000, China
Interests: coupling mechanism of wave energy power generation device and ocean energy
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Guest Editor
School of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing 102206, China
Interests: pump turbine; multiphase flow; structural response; numerical simulation

Special Issue Information

Dear Colleagues,

In recent years, significant progress has been made in the study of multi-phase flows, focusing on symmetric and asymmetric behaviour and their applications in various industrial fields through the integration of advanced simulations and measurements.

Theoretical analyses, numerical simulations, and experimental measurements are increasingly being employed to capture the complex dynamics of multi-phase flows. By leveraging insights gained from symmetric and asymmetric flow research, scientists and engineers can optimize the design process, improve efficiency, and reduce the operational risk of the equipment. Interdisciplinary collaborations among theoretical fluid dynamics experts, computational scientists, and experimentalists continue to drive innovation and push the boundaries of multi-phase flow research and its practical applications.

This Special Issue focuses on the ongoing advancements in theoretical innovation, simulation techniques, and experimental measurements of the multi-phase flow, underscoring their pivotal roles in advancing the understanding of multi-phase flow dynamics and fostering innovation across various scientific and engineering disciplines.

The topics of interest (keywords) for this Special Issue include, but are not limited to, the following:

  • Multi-phase flow;
  • Theoretical innovation;
  • Simulation techniques;
  • Experimental measurements;
  • Symmetric and asymmetric behaviour;
  • Industrial applications;
  • Micro- and nano-flow;
  • Cavitation;
  • Erosion;
  • Design optimization;
  • Risk reduction;
  • Performance and efficiency improvement;
  • Flow visualization;
  • Heat transfer;
  • Artificial intelligence;
  • Industrial digitization;
  • Digital twin;
  • Data-driven applications;
  • Physics-informed neural networks;
  • HPC acceleration;
  • GPU acceleration;
  • Laser doppler anemometry (LDA);
  • Particle image velocimetry (PIV);
  • X-ray imaging;
  • Chemical processing;
  • Energy production;
  • Environmental sustainability;
  • Food engineering;
  • Biomedical sciences; 
  • Pharmaceutical industry.

Prof. Dr. Zhengwei Wang
Dr. Xingxing Huang
Dr. Yongyao Luo
Dr. Xijie Song
Dr. Wei Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • multi-phase flow
  • theoretical innovation
  • simulation techniques
  • experimental measurements
  • symmetric and asymmetric behaviour
  • industrial applications
  • micro- and nano-flow
  • cavitation
  • erosion
  • design optimization
  • risk reduction
  • performance and efficiency improvement
  • flow visualization
  • heat transfer
  • artificial intelligence
  • industrial digitization
  • digital twin
  • data-driven applications
  • physics-informed neural networks
  • HPC acceleration
  • GPU acceleration
  • laser doppler anemometry (LDA)
  • particle image velocimetry (PIV)
  • X-ray imaging
  • chemical processing
  • energy production
  • environmental sustainability
  • food engineering
  • biomedical sciences
  • pharmaceutical industry

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Published Papers (2 papers)

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Research

15 pages, 16677 KiB  
Article
Research on the Influence of Symmetrical Installation of Blade on the Sediment Erosion in a Multi-Stage Centrifugal Pump
by Xijie Song, Kuizheng Zhu and Zhengwei Wang
Symmetry 2024, 16(12), 1636; https://doi.org/10.3390/sym16121636 - 11 Dec 2024
Viewed by 517
Abstract
Double suction pumps are widely used in the Yellow River in the China water intake pump stations, which face serious sediment wear. A prediction model for gap erosion in gas-liquid solid three-phase flow was constructed. A gas core factor has been added to [...] Read more.
Double suction pumps are widely used in the Yellow River in the China water intake pump stations, which face serious sediment wear. A prediction model for gap erosion in gas-liquid solid three-phase flow was constructed. A gas core factor has been added to the gap erosion model to achieve accurate prediction of particle impact velocity and impact angle caused by cavitation air core deformation. The influence mechanism of cavitation flow and sand-laden suction vortex on the sediment erosion. Usually, double suction pumps are one type. This study aims to explore the effects of the symmetrical and asymmetrical installation of double suction pump impellers on the wear and energy dissipation of pumps under sediment conditions in three-stage centrifugal pumps. The research results indicate that under symmetrical installation, the wear of the impeller caused by sediment impact is significantly intensified with a maximum velocity of 27 m/s. In contrast, asymmetric installation significantly improves sediment wear, with a maximum velocity of 24.3 m/s. By optimizing the staggered angle on both sides of the impeller, it was found that when the staggered angle was set to 10.85°, the performance of the pump under sediment conditions reached its optimal level, with a minimal erosion rate of 0.000008 kg·m−2·s−1. These results provide an important basis for the design and optimization of three-stage centrifugal pumps in sediment transport and have significant theoretical significance and engineering application value. Full article
(This article belongs to the Special Issue Advances in Multi-phase Flow: Symmetry, Asymmetry, and Applications)
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23 pages, 2939 KiB  
Article
Study of Unsymmetrical Magnetic Pulling Force and Magnetic Moment in 1000 MW Hydrogenerator Based on Finite Element Analysis
by Jiwen Zhang, Xingxing Huang and Zhengwei Wang
Symmetry 2024, 16(10), 1351; https://doi.org/10.3390/sym16101351 - 12 Oct 2024
Viewed by 836
Abstract
The large dimensions of the 1000 MW hydroelectric generator sets require high mounting accuracy. Small deviations can lead to asymmetry, which in turn triggers unbalanced magnetic pulls and moments. Therefore, symmetry is a central challenge in the installation and operation of giant hydroelectric [...] Read more.
The large dimensions of the 1000 MW hydroelectric generator sets require high mounting accuracy. Small deviations can lead to asymmetry, which in turn triggers unbalanced magnetic pulls and moments. Therefore, symmetry is a central challenge in the installation and operation of giant hydroelectric generators. In this paper, the effects of radial eccentricity, axial offset, and rotor shaft deflection on the unbalanced magnetic pull and moment are investigated by transient finite element analysis of the asymmetric magnetic field. The results of the time-domain and frequency-domain analyses show that asymmetric operation generates unbalanced magnetic forces and moments. These forces and moments increase linearly with increasing offset or deflection rate. When the eccentricity meets the installation criteria, the unbalanced magnetic pull forces are small and within acceptable limits. This study helps to understand the relationship between asymmetry and unbalanced magnetic pulling forces in large hydroelectric generators, and provides a theoretical basis for standardizing installation deviation control. Full article
(This article belongs to the Special Issue Advances in Multi-phase Flow: Symmetry, Asymmetry, and Applications)
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