Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.7
3.4
Journals
Micromachines
Special Issues
Microreactor Chips: Design, Fabrication, and Cutting-Edge Applications
share announcement

Microreactor Chips: Design, Fabrication, and Cutting-Edge Applications

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "C：Chemistry".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 6243

Special Issue Editors

Dr. Hao Feng

E-Mail Website
Guest Editor
MIIT Key Laboratory of Thermal Control of Electronic Equipment, School of Energy and Power Engineering, Nanjing University of Science & Technology, Nanjing 210094, China
Interests: microreactor; photocatalysis; multiphase reacting flow
Dr. Zhibin Wang

E-Mail Website
Guest Editor
School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China
Interests: microfluidic devices; transport modeling; advanced energy systems
Dr. Zhefei Pan

E-Mail Website
Guest Editor
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, China
Interests: flow cells; ambient nitrogen reduction; energy conversion and storage
Special Issues, Collections and Topics in MDPI journals
Dr. Xuefeng He

E-Mail Website
Guest Editor
Liangjiang International College, Chongqing University of Technology, Chongqing 401135, China
Interests: microfluidic devices; heat and mass transfer
Prof. Dr. Rong Chen

E-Mail Website
Guest Editor
School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Interests: microreactor; optofluidics; advanced energy conversion and utilization; heat and mass transfer

Special Issue Information

Dear Colleagues,

Microreactor technology has been considered one of the candidates with the greatest potential to realize the sustainable development of the chemical industry due to its excellent heat and mass transfer properties, precise flow control, optimal thermodynamic equilibrium, and flexible operation. These merits have created substantial opportunities for various research fields, including fine chemical synthesis, biochemical analyses, material synthesis, and energy conversion. Since there are complex multiphase flows, mass transfers, and catalytic reactions in microreactors, the coupling effect between the multiphase flow, mass transfer, and conversion, as well as the catalytic activity, plays a key role in a microreactor's performance. Recently, numerous works have been performed both experimentally and theoretically to expand our fundamental understanding and provide new insights into the microreactors to enhance the mass transfer, improve the reaction kinetics, intensify the microreactor durability, and facilitate commercial deployment.

In this Research Topic, we would like to provide state-of-the-art achievements from fundamental to applications in microreactors. This Research Topic will cover fundamental aspects of multiphase reacting flow behaviors, novel catalyst synthesis, innovative structural design, and various cutting-edge applications. We welcome short communications, original research papers, and review articles that focus on the design, fabrication, and applications of microreactor.

We look forward to receiving your submissions!

Dr. Hao Feng
Dr. Zhibin Wang
Dr. Zhefei Pan
Dr. Xuefeng He
Prof. Dr. Rong Chen
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. Micromachines 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 2600 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

  • microreactor devices
  • multiphase reacting flow
  • mass transfer
  • fine chemical synthesis
  • biochemical analyses
  • material synthesis
  • energy conversion and utilization

Published Papers (5 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

20 pages, 8327 KiB  
Article
Design and Mixing Analysis of a Passive Micromixer Based on Curly Baffles
by Makhsuda Juraeva and Dong-Jin Kang
Micromachines 2023, 14(9), 1795; https://doi.org/10.3390/mi14091795 - 20 Sep 2023
Viewed by 922
Abstract
A novel passive micromixer based on curly baffles is proposed and optimized through the signal-to-noise analysis of various design parameters. The mixing performance of the proposed design was evaluated across a wide Reynolds number range, from 0.1 to 80. Through the analysis, the [...] Read more.
A novel passive micromixer based on curly baffles is proposed and optimized through the signal-to-noise analysis of various design parameters. The mixing performance of the proposed design was evaluated across a wide Reynolds number range, from 0.1 to 80. Through the analysis, the most influential parameter was identified, and its value was found to be constant regardless of the mixing mechanism. The optimized design, refined using the signal-to-noise analysis, demonstrated a significant enhancement of mixing performance, particularly in the low Reynolds number range (Re< 10). The design set obtained at the diffusion dominance range shows the highest degree of mixing (DOM) in the low Reynolds number range of Re< 10, while the design set optimized for the convection dominance range exhibited the least pressure drop across the entire Reynolds number spectrum (Re< 80). The present design approach proved to be a practical tool for identifying the most influential design parameter and achieving excellent mixing and pressure drop characteristics. The enhancement is mainly due to the curvature of the most influential design parameter. Full article
(This article belongs to the Special Issue Microreactor Chips: Design, Fabrication, and Cutting-Edge Applications)
►▼ Show Figures

Figure 1

12 pages, 3422 KiB  
Article
Role of Bubble Evolution in the Bubble-Propelled Janus Micromotors
by Gang Chen, Xuekui Wang, Bingyang Zhang, Fangfang Zhang, Zhibin Wang, Baiqiang Zhang and Guopei Li
Micromachines 2023, 14(7), 1456; https://doi.org/10.3390/mi14071456 - 20 Jul 2023
Cited by 1 | Viewed by 1179
Abstract
Bubble-propelled Janus micromotors have attracted extensive attention in recent years and have been regarded as powerful tools in the environmental and medical fields due to their excellent movement ability. The movement ability can mainly be attributed to the periodic growth, detachment, and/or collapse [...] Read more.
Bubble-propelled Janus micromotors have attracted extensive attention in recent years and have been regarded as powerful tools in the environmental and medical fields due to their excellent movement ability. The movement ability can mainly be attributed to the periodic growth, detachment, and/or collapse of the bubble. However, subjected to the experimental conditions, the mechanism of bubble evolution on the motion of the micromotor could not be elucidated clearly. In this work, a finite element method was employed for exploring the role of bubble evolution in bubble-propelled Janus micromotors, which emphasized the growth and collapse of bubbles. After the proposed model was verified by the scallop theorem, the influence of the growth and rapid collapse of bubbles on micromotors was investigated. Results show that the growth and collapse of a bubble can drive the micromotor to produce a displacement, but the displacement caused by a bubble collapse is significantly greater than that caused by bubble growth. The reasons for this phenomenon are analyzed and explained. In addition to the influence of bubble size, the collapse time of the bubble is also investigated. Full article
(This article belongs to the Special Issue Microreactor Chips: Design, Fabrication, and Cutting-Edge Applications)
►▼ Show Figures

Figure 1

20 pages, 6387 KiB  
Article
Performance Investigation of Micromixer with Spiral Pattern on the Cylindrical Chamber Side Wall
by Shuang Yang, He Zhang, Shuihua Yang, Yunlong Zheng, Jianan Wang and Rongyan Chuai
Micromachines 2023, 14(7), 1303; https://doi.org/10.3390/mi14071303 - 25 Jun 2023
Viewed by 917
Abstract
In this paper, a sequence of passive micromixers with spiral patterns on the side wall of cylindrical chambers are designed, optimized, prepared and tested. The simulation studies show that the vortex magnitude and continuity in the mixing chamber are the most important factors [...] Read more.
In this paper, a sequence of passive micromixers with spiral patterns on the side wall of cylindrical chambers are designed, optimized, prepared and tested. The simulation studies show that the vortex magnitude and continuity in the mixing chamber are the most important factors to determine mixing performance, while the inlet position and structural parameters are secondary influences on their performance. According to the above principles, the performance of a micromixer with a continuous sidewall spiral finally wins out. The total mixing length is only 14 mm, but when Re = 5, the mixing index can reach 99.81%. The multi-view visual tests of these mixer chips prepared by 3D printing are consistent with the simulation results. This paper provides a new idea for optimizing the micromixer with spiral patterns on the side wall and the problems of floor area and pressure loss are significantly improved compared to the conventional spiral structure. Full article
(This article belongs to the Special Issue Microreactor Chips: Design, Fabrication, and Cutting-Edge Applications)
►▼ Show Figures

Figure 1

17 pages, 6712 KiB  
Article
Mixing Performance of a Passive Micromixer Based on Multiple Baffles and Submergence Scheme
by Makhsuda Juraeva and Dong-Jin Kang
Micromachines 2023, 14(5), 1078; https://doi.org/10.3390/mi14051078 - 19 May 2023
Cited by 2 | Viewed by 1375
Abstract
A novel passive micromixer based on multiple baffles and a submergence scheme was designed, and its mixing performance was simulated over a wide range of Reynolds numbers ranging from 0.1 to 80. The degree of mixing (DOM) at the outlet and [...] Read more.
A novel passive micromixer based on multiple baffles and a submergence scheme was designed, and its mixing performance was simulated over a wide range of Reynolds numbers ranging from 0.1 to 80. The degree of mixing (DOM) at the outlet and the pressure drop between the inlets and outlet were used to assess the mixing performance of the present micromixer. The mixing performance of the present micromixer showed a significant enhancement over a wide range of Reynolds numbers (0.1 ≤ Re ≤ 80). The DOM was further enhanced by using a specific submergence scheme. At low Reynolds numbers (Re < 5), submergence scheme Sub24 produced the highest DOM, approximately 0.57, which was 1.38 times higher than the case with no submergence. This enhancement was due to the fluid flowing from or toward the submerged space, creating strong upward or downward flow at the cross-section. At high Reynolds numbers (Re > 10), the DOM of Sub1234 became the highest, reaching approximately 0.93 for Re = 20, which was 2.75 times higher than the case with no submergence. This enhancement was caused by a large vortex formed across the whole cross-section, causing vigorous mixing between the two fluids. The large vortex dragged the interface between the two fluids along the vortex perimeter, elongating the interface. The amount of submergence was optimized in terms of DOM, and it was independent of the number of mixing units. The optimum submergence values were 90 μm for Sub24 and Re = 1, 100 μm for Sub234 and Re = 5, and 70 μm for Sub1234 and Re = 20. Full article
(This article belongs to the Special Issue Microreactor Chips: Design, Fabrication, and Cutting-Edge Applications)
►▼ Show Figures

Figure 1

19 pages, 6722 KiB  
Article
Transition Routes of Electrokinetic Flow in a Divergent Microchannel with Bending Walls
by Yanxia Shi, Ming Zeng, Haoxin Bai, Shuangshuang Meng, Chen Zhang, Xiaoqiang Feng, Ce Zhang, Kaige Wang and Wei Zhao
Micromachines 2023, 14(2), 474; https://doi.org/10.3390/mi14020474 - 18 Feb 2023
Cited by 1 | Viewed by 1222
Abstract
Electrokinetic flow can be generated as a highly coupled phenomenon among velocity fields, electric conductivity fields, and electric fields. It can exhibit different responses to AC electric fields in different frequency regimes, according to different instability/receptivity mechanisms. In this investigation, by both flow [...] Read more.
Electrokinetic flow can be generated as a highly coupled phenomenon among velocity fields, electric conductivity fields, and electric fields. It can exhibit different responses to AC electric fields in different frequency regimes, according to different instability/receptivity mechanisms. In this investigation, by both flow visualization and single-point laser-induced fluorescence (LIF) method, the response of AC electrokinetic flow and the transition routes towards chaos and turbulence have been experimentally investigated. It is found, when the AC frequency ff>30 Hz, the interface responds at both the neutral frequency of the basic flow and the AC frequency. However, when ff≥30 Hz, the interface responds only at the neutral frequency of the basic flow. Both periodic doubling and subcritical bifurcations have been observed in the transition of AC electrokinetic flow. We hope the current investigation can promote our current understanding of the ultrafast transition process of electrokinetic flow from laminar state to turbulence. Full article
(This article belongs to the Special Issue Microreactor Chips: Design, Fabrication, and Cutting-Edge Applications)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-5
Back to TopTop