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Processes
Special Issues
Dynamic Modelling and Simulation of Granular Materials in Multiphase Systems
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Dynamic Modelling and Simulation of Granular Materials in Multiphase Systems

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

Deadline for manuscript submissions: 10 September 2024 | Viewed by 1695

Special Issue Editors

Dr. Haiping Zhu

E-Mail Website
Guest Editor
School of Engineering, Design and Built Environment, Western Sydney University, Penrith, NSW 2751, Australia
Interests: granular mechanics; modelling and simulation of particle and particle–fluid flows; handling of bulk/particulate materials; particulate processing
Prof. Dr. Kaiwei Chu

E-Mail Website
Guest Editor
School of Qilu Transportation, Shandong University, 12550 Erhuan East Road, Jinan 250002, China
Interests: FEM\DEM\CFD and other simulation methods; DEM coarse-grained (CG) theory; mathematical modeling; complex particle-fluid system

Special Issue Information

Dear Colleagues,

Granular materials widely encountered in industry and in nature can range in size from nanometres to centimetres; some examples are salt, sugar, sand, soils, mineral ores, agricultural grains and many industrial solids. Granular materials show unique behaviour that is different from solids and fluids. Understanding and modelling the dynamic behaviour of granular materials has been a major research focus worldwide for many years. Various physical and numerical experiments have been conducted to understand the features and the relevant mechanisms for different granular materials and processes at various scales. These studies have the potential to develop general theories and improve the design capacity for particulate and multiphase processing.

This special issue entitled “Dynamic Modelling and Simulation of Granular Materials in Multiphase Systems” seeks high-quality research focusing on the experimental and numerical studies on granular materials and processes. Topics include, but are not limited to, the following:

  • Granular flow;
  • Simulation/modelling of granular materials;
  • Particle–fluid flow
  • Processing and handling of bulk/particulate materials;
  • Powder/particle technology;
  • Dynamics of granular materials;
  • Particle properties.

Dr. Haiping Zhu
Prof. Dr. Kaiwei Chu
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. Processes 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

  • granular material
  • particle flow
  • multiphase flow
  • particle–fluid flow
  • modelling and simulation

Published Papers (2 papers)

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Research

20 pages, 6004 KiB  
Article
Study on Multi-Scale Cloud Growth Characteristics of Frustoconical Dispersal Devices
by Weizhi Zhou, Qiang Li, Chunlan Jiang and Ye Du
Processes 2024, 12(7), 1316; https://doi.org/10.3390/pr12071316 - 25 Jun 2024
Viewed by 531
Abstract
This study aims to understand cloud growth behavior and enhance cloud safety and reliability by investigating the design of cloud dispersal devices. Based on the experimental results and simulation results, this study analyzes the dispersion characteristics of cloud materials within a frustoconical device [...] Read more.
This study aims to understand cloud growth behavior and enhance cloud safety and reliability by investigating the design of cloud dispersal devices. Based on the experimental results and simulation results, this study analyzes the dispersion characteristics of cloud materials within a frustoconical device with a semi-cone angle ranging from 0° to 10° across multiple scales. The collision aggregation model for cloud particles and the multi-scale coupling mechanism for cloud growth are established. The research shows that the semi-cone angle of the device extends the effective cloud growth duration and enlarges the cloud macroscopic size. At the mesoscopic scale, vortex phenomena are observed, causing particles to converge within the cloud, resulting in collisions and aggregation. The vortices enhance the continuity of the cloud concentration. The magnitude of these vortices demonstrates a positive correlation with the magnitude of the semi-cone angle of the dispersal device. For a macroscopically stable cloud, the high-concentration area within the cloud moves outward radially with an increase in the semi-cone angle. This study provides a theoretical foundation for cloud morphology control technology, contributing to enhancing the safety and reliability of cloud systems. Full article
(This article belongs to the Special Issue Dynamic Modelling and Simulation of Granular Materials in Multiphase Systems)
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20 pages, 7334 KiB  
Article
Three-Dimensional VOF-DEM Simulation Study of Particle Fluidization Induced by Bubbling Flow
by Liming Liu, Mengqin Zhan, Rongtao Wang and Yefei Liu
Processes 2024, 12(6), 1053; https://doi.org/10.3390/pr12061053 - 21 May 2024
Viewed by 641
Abstract
The bubbling flow plays a key role in gas–liquid–solid fluidized beds. To understand the intrinsic fluidization behaviors at the discrete bubble and particle scale, coupled simulations with the volume of fluid model and the discrete element method are performed to investigate the effects [...] Read more.
The bubbling flow plays a key role in gas–liquid–solid fluidized beds. To understand the intrinsic fluidization behaviors at the discrete bubble and particle scale, coupled simulations with the volume of fluid model and the discrete element method are performed to investigate the effects of the gas inlet velocity, particle properties and two-orifice bubbling flow on particle fluidization. Three-dimensional simulations are carried out to accurately capture the dynamic changes in the bubble shape and trajectory. A bubbling flow with a closely packed bed is simulated to study the onset of particle fluidization. The obvious phenomena of particle fluidization are presented by both the experiment and simulation. Although an increasing gas inlet velocity promotes particle fluidization, the good fluidization of particles cannot be achieved solely by increasing the gas inlet velocity. When the channel is packed with more particles, the bubbles take a longer time to pass through the higher particle bed, and the bubbles grow larger in the bed. The increase in particle density also extends the time needed for the bubbles to escape from the bed, and it is more difficult to fluidize the particles with a larger density. Even if more particles are added into the channel, the percentage of suspended particles is not significantly changed. The percentage of suspended particles is not increased with a decrease in the particle diameter. The particle suspension is not significantly improved by the bubbling flow with two orifices, while the particle velocity is increased due to the more frequent bubble–particle collisions. The findings from this study will be beneficial in guiding the enhancement of particle fluidization in multiphase reactors. Full article
(This article belongs to the Special Issue Dynamic Modelling and Simulation of Granular Materials in Multiphase Systems)
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