Multiphase Flow and Heat and Mass Transfer in Industrial Complex Processes and Reactors

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Chemical Processes and Systems".

Deadline for manuscript submissions: 10 November 2026 | Viewed by 1180

Editors


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Guest Editor
School of Innovation, Design & Technology, Wellington Institute of Technology, Wellington, New Zealand
Interests: heat transfer; fluid mechanics; CFD; multiphase flow; renewable energy; thermodynamics

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Guest Editor
Department of Engineering and Architectural Studies, Ara Institute of Canterbury, Christchurch 8011, Canterbury, New Zealand
Interests: unsteady aerodynamics; computational fluid dynamics; aircraft icing; multi-rotor aerodynamics; UAVs

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Guest Editor Assistant
Dalton Electrical Co Ltd., Auckland, New Zealand
Interests: heat transfer; thermodynamics; CFD; multiphase flow; mechatronics

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Guest Editor Assistant
College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños, College, Batong Malake, Laguna, Philippines
Interests: computational fluid dynamics; fluid mechanics; heat transfer

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the critical aspects of multiphase flow and heat and mass transfer in complex industrial processes and reactors. Multiphase flow systems, where gases, liquids, and solids interact dynamically, are fundamental to a wide range of industries, including chemical processing, energy production, pharmaceuticals, food manufacturing, and environmental engineering. Understanding and optimizing these systems are essential for improving efficiency, product quality, and sustainability. The scope of this Special Issue encompasses both theoretical and experimental studies that provide insights into the mechanisms of multiphase flow and associated heat and mass transfer phenomena. We invite contributions that explore innovative methodologies, advanced modeling techniques, and cutting-edge technologies relevant to industrial applications. Key areas of interest include chemical processing, such as catalytic reactors, separation processes, and chemical vapor deposition; energy production, including oil and gas pipelines, gasification, liquefaction, and nuclear reactors; pharmaceutical applications like crystallization processes, drug formulation, and bioreactors; food manufacturing processes such as spray drying, emulsification, and pasteurization; environmental engineering topics like wastewater treatment, air pollution control, and soil remediation; and slurry flow applications across various industries. Additionally, we seek papers addressing the mechanical aspects of multiphase systems, including equipment design, mechanical wear, and material durability under multiphase flow conditions. We are particularly interested in papers presenting advanced modeling and simulation techniques like computational fluid dynamics (CFD) and discrete element method (DEM), novel experimental methods, process optimization strategies, and real-world industrial case studies.

Keywords for this Special Issue include multiphase flow, heat transfer, mass transfer, slurry flow, chemical reactors, energy systems, pharmaceutical processes, food engineering, environmental applications, mechanical aspects, modeling and simulation, and experimental techniques. This Special Issue aims to serve as a comprehensive resource for researchers and practitioners, providing the latest advancements and fostering interdisciplinary collaboration to tackle the complex challenges associated with multiphase flow and transfer in industrial processes and reactors. Researchers and practitioners are invited to submit their manuscripts through the journal’s submission portal, with all submissions undergoing a rigorous peer-review process to ensure the highest quality and relevance of published work.

Dr. Gopal Krishan
Dr. Nay Lin Oo
Guest Editors

Dr. Anarghya Ananda Murthy
Dr. Ralph Kristoffer B. Gallegos
Guest Editor Assistants

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.

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-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access semimonthly 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

  • multiphase flow
  • heat transfer
  • mass transfer
  • slurry flow
  • chemical reactors
  • energy systems
  • pharmaceutical processes
  • food engineering
  • environmental applications
  • mechanical aspects
  • computational fluid dynamics (CFD)
  • discrete element method (DEM)
  • modeling and simulation
  • experimental techniques
  • process optimization

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Published Papers (1 paper)

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Research

25 pages, 5506 KB  
Article
Numerical Simulation of Gradient Pore Structures in Anodes for Anion Exchange Membrane Water Electrolysis
by Qian Zhu, Li Xu, Guizhen Li, Wei Xu, Yuxin Wang and Wen Zhang
Processes 2026, 14(10), 1580; https://doi.org/10.3390/pr14101580 - 13 May 2026
Viewed by 456
Abstract
To mitigate the gas–liquid mass-transfer bottleneck in anion-exchange membrane water electrolysis (AEMWE), a 3D multiphysics numerical model was developed to systematically investigate the regulatory effects of gradient porosity (GPD) and gradient pore-size distribution (GPSD) on anode reaction kinetics and cell polarization. Single-factor analysis [...] Read more.
To mitigate the gas–liquid mass-transfer bottleneck in anion-exchange membrane water electrolysis (AEMWE), a 3D multiphysics numerical model was developed to systematically investigate the regulatory effects of gradient porosity (GPD) and gradient pore-size distribution (GPSD) on anode reaction kinetics and cell polarization. Single-factor analysis reveals that increasing the GPD/GPSD from the membrane side toward the flow channel side effectively reduces activation overpotential due to the high specific surface area of small pores near the membrane, while simultaneously lowering mass-transfer resistance through high porosity and large pores near the flow channel. Conversely, a decreasing gradient leads to localized gas stagnation and uneven mass transfer, deteriorating cell performance. Furthermore, an innovative synergistic design is proposed featuring a simultaneous linear increase in porosity (0.6 to 0.9) and pore diameter (0.11 to 0.17 mm). This configuration achieves a cell voltage of only 1.812 V at 1100 mA/cm2 (1 mol/L KOH, 80 °C), approximately 40 mV lower than that of conventional uniform structures, thereby significantly reducing energy consumption at high current densities. This study provides a mechanistic framework for the precise architectural design of high-performance AEMWE electrodes, highlighting the importance of spatial heterogeneity in optimizing two-phase transport. Full article
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