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Processes
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Advances of Multiphase Computational Fluid Dynamics in Energy Engineering
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Advances of Multiphase Computational Fluid Dynamics in Energy Engineering

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

Deadline for manuscript submissions: 25 January 2025 | Viewed by 2141

Special Issue Editors

Dr. Yuting Zhuo

E-Mail Website
Guest Editor
School of Chemical Engineering, UNSW Sydney, Kensington, NSW 2052, Australia
Interests: the process modelling of clean energy production, storage, and application
Dr. Tianyu Wang

E-Mail Website
Guest Editor
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Interests: multiphase flow; fluidization; computational modeling

Special Issue Information

Dear Colleagues,

Currently, multiphase flows play a crucial role in numerous industrial processes. The study of multiphase flows spans across both scientific and engineering fields, covering various technological areas, a broad range of scales, and a diverse set of analytical and experimental methods. The goal of this Special Issue is to deepen our understanding of multiphase flows and to develop dependable computational models. To achieve this, both experimental and computational techniques are vitally important.

This Special Issue welcomes submissions on a variety of topics, including, but not limited to, the following: computational and experimental methods for multiphase flows, bubbly and droplet flows, particle-laden flows, and turbulence in multiphase flows. We also welcome contributions related to industrial applications, such as reactive multiphase flows, granular media, fluidization, cavitation, nucleation, mixing, collision, agglomeration and breakup, and flow instabilities.

Dr. Yuting Zhuo
Dr. Tianyu 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. 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

  • computational and experimental methods for multiphase flows
  • bubbly and droplet flows
  • particle-laden flows
  • turbulence in multiphase flows
  • DEM
  • multiphysics modeling

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

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Research

20 pages, 8984 KiB  
Article
Numerical Study on the Heat Dissipation Performance of Diamond Microchannels under High Heat Flux Density
by Jiwen Zhao, Kunlong Zhao, Xiaobin Hao, Yicun Li, Sen Zhang, Benjian Liu, Bing Dai, Wenxin Cao and Jiaqi Zhu
Processes 2024, 12(8), 1675; https://doi.org/10.3390/pr12081675 - 9 Aug 2024
Viewed by 989
Abstract
Heat dissipation significantly limits semiconductor component performance improvement. Thermal management devices are pivotal for electronic chip heat dissipation, with the enhanced thermal conductivity of materials being crucial for their effectiveness. This study focuses on single-crystal diamond, renowned for its exceptional natural thermal conductivity, [...] Read more.
Heat dissipation significantly limits semiconductor component performance improvement. Thermal management devices are pivotal for electronic chip heat dissipation, with the enhanced thermal conductivity of materials being crucial for their effectiveness. This study focuses on single-crystal diamond, renowned for its exceptional natural thermal conductivity, investigating diamond microchannels using finite element simulations. Initially, a validated mathematical model for microchannel flow heat transfer was established. Subsequently, the heat dissipation performance of typical microchannel materials was analyzed, highlighting the diamond’s impact. This study also explores diamond microchannel topologies under high-power conditions, revealing unmatched advantages in ultra-high heat flux density dissipation. At 800 W/cm2 and inlet flow rates of 0.4–1 m/s, diamond microchannels exhibit lower maximum temperatures compared to pure copper microchannels by 7.0, 7.2, 7.4, and 7.5 °C, respectively. Rectangular cross-section microchannels demonstrate superior heat dissipation, considering diamond processing costs. The exploration of angular structures with varying parameters shows significant temperature reductions with increasing complexity, such as a 2.4 °C drop at i = 4. The analysis of shape parameter ki indicates optimal heat dissipation performance at ki = 1.1. This research offers crucial insights for developing and optimizing diamond microchannel devices under ultra-high-heat-flux-density conditions, guiding future advancements in thermal management technology. Full article
(This article belongs to the Special Issue Advances of Multiphase Computational Fluid Dynamics in Energy Engineering)
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15 pages, 5652 KiB  
Article
Numerical Investigation of Micrometer-Sensitive Particle Intrusion in Hydraulic Valve Clearances and Its Impact on Valve Performance
by Jianjun Zhang, Hong Ji, Wenjie Zhao, Qianpeng Chen and Xinqiang Liu
Processes 2024, 12(5), 864; https://doi.org/10.3390/pr12050864 - 25 Apr 2024
Cited by 2 | Viewed by 756
Abstract
The intrusion of micrometer-sensitive contaminant particles into the clearance of sliding valves within hydraulic fluids is one of the root causes of valve sticking and reliability issues in hydraulic systems. To reveal the transient process and characteristics of particle intrusion into the clearance [...] Read more.
The intrusion of micrometer-sensitive contaminant particles into the clearance of sliding valves within hydraulic fluids is one of the root causes of valve sticking and reliability issues in hydraulic systems. To reveal the transient process and characteristics of particle intrusion into the clearance process, this paper proposes a numerical method for fluid–particle one-way coupling and verifies it through experimentation. Furthermore, a numerical simulation of the motion trajectory of spherical iron particles inside the valve chamber was conducted in a two-dimensional flow model. It was discovered that in a steady-state flow field with a certain valve opening, micrometer-sized particles in the valve chamber’s hydraulic fluid mainly move with the valve flow stream, and the number of micron particles invading the slide valve clearance and the probability of invasion is related to the slide valve opening and differential pressure. When the slide valve opening decreases, especially in the small opening state, the probability of particles invading the slide valve clearance will increase dramatically, and the probability of invading the clearance is as high as 27% in a valve opening of 50 μm; the larger the pressure difference between the valve ports, the more the number of particles invading the slide valve clearance increases; the particles in the inlet of the slide valve clearance are more prone to invade the slide valve clearance, and invade in an inclined way, touching the wall and then bouncing back. These findings are of great value for the design of highly reliable hydraulic control valves and the understanding of the mechanism of slide valve stalls and provide an important scientific basis for the optimization and improvement in the reliability of hydraulic systems. Full article
(This article belongs to the Special Issue Advances of Multiphase Computational Fluid Dynamics in Energy Engineering)
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