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Advances in Multiphase Flow: Theory, Research, and Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Fluid Science and Technology".

Deadline for manuscript submissions: 20 November 2026 | Viewed by 770

Special Issue Editor


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Guest Editor
Department of Mechanics, Zhejiang University, 310027 Hangzhou, China
Interests: multiphase flow; microfluids and nanofluids; turbulence and coherent structure; fluid machinery
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Multiphase flow is an important branch of fluid mechanics, which has a wide range of applications in energy, chemical, mechanical, petroleum, water conservancy, environment, medicine, and other fields. Although many achievements have been made in fundamental research and application of multiphase flow, there are still many problems that urgently need to be solved. Therefore, this Special Issue aims to publish original research or review articles that explore the fundamental principles and applications of any multiphase flows. Potential topics include, but are not limited to, th following: gas–solid two-phase flow; liquid–solid two-phase flow; gas–liquid two-phase flow; droplets; bubbles; cavitations; and particle manipulation. We look forward to your submissions.

Prof. Dr. Jianzhong Lin
Guest Editor

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 250 words) can be sent to the Editorial Office for assessment.

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Keywords

  • gas–solid two-phase flow
  • liquid–solid two-phase flow
  • gas–liquid two-phase flow
  • droplets
  • bubbles

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Published Papers (1 paper)

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Research

14 pages, 11116 KB  
Article
Inertial Focusing of a Large Particle in Square-Duct Flow at Low Reynolds Numbers
by Hiroshi Yamashita, Naoto Yokoyama, Takeshi Akinaga and Masako Sugihara-Seki
Appl. Sci. 2026, 16(4), 2001; https://doi.org/10.3390/app16042001 - 18 Feb 2026
Viewed by 374
Abstract
Spherical particles that are neutrally buoyant in a square-duct flow are known to undergo cross-sectional motion due to inertial lift forces while being transported downstream. Far downstream, this lateral migration converges, and particles focus near the midpoints of the duct walls, as demonstrated [...] Read more.
Spherical particles that are neutrally buoyant in a square-duct flow are known to undergo cross-sectional motion due to inertial lift forces while being transported downstream. Far downstream, this lateral migration converges, and particles focus near the midpoints of the duct walls, as demonstrated by experiments, numerical simulations, and theoretical analyses. In contrast, numerical studies have predicted that relatively large particles at low Reynolds numbers can focus not near the wall midpoints but rather near the duct corners along the diagonals. In this study, we reproduce this diagonal focusing pattern numerically and confirm its occurrence experimentally. Numerical computations of the lift forces acting on a particle reveal the equilibrium points that appear within the cross-section and clarify their stability. Front-view observation experiments are conducted under corresponding parameter conditions, and the distributions of particle positions in the downstream cross-section are measured. Both numerical and experimental results confirm that particles indeed focus near the corners along the diagonals for specific parameter ranges. Furthermore, we show that this diagonal pattern transitions, with increasing Reynolds number, to a bistable focusing pattern in which focusing occurs on both the diagonals and the midlines, and finally to the standard midline-focused pattern. This sequence of transitions is explained by changes in the stability of the particle equilibrium points. Full article
(This article belongs to the Special Issue Advances in Multiphase Flow: Theory, Research, and Applications)
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