Article
Engineering, Multidisciplinary
Ramezan Ali Taheri, Vahabodin Goodarzi
Summary: A high effective micromixer with baffles and curved walls is proposed in this study to enhance mixing efficiency. Numerical analysis and experimental validation show that the centrifugal force and flow separation are the major factors contributing to the improvement of mixing efficiency. The micromixer is able to achieve species mixing of about 100%, which is 61.58% higher than the conventional design.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Chemistry, Analytical
Sintayehu Assefa Endaylalu, Wei-Hsin Tien
Summary: This study investigated the mixing performance in a Y-junction microchannel with acoustic streaming through numerical simulation. Acoustic streaming significantly increased vorticity and improved mixing performance, with further enhancements achieved at lower inlet velocities, sharper vertex angles, and higher oscillation amplitudes. Integration of triangular structures both at the junction and sidewall regions led to the best mixing index results.
Article
Energy & Fuels
Yanwen Gong, Xueni Cheng
Summary: Electroosmotic micromixing is a valuable technique in microanalysis systems, and a contraction-expansion microchannel is used to study the mixing caused by AC electroosmotic. The flow and concentration field distributions in the microchannel are analyzed, and the influence of AC electric fields on circulation flows and rotating vortices is observed. The study shows that the mixing quality is dependent on the relative magnitudes of the electroosmotic force and inertia force, and factors such as inlet velocity, frequency, and voltage also affect the vortex formation and mixing performance.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Engineering, Chemical
Fang Yang, Wei Zhao, Guiren Wang
Summary: Electrokinetic (EK) micromixers have been widely studied, but they usually require different electrical conductivity between the fluids to be mixed. This study presents a method to enhance mixing between fluids with identical conductivity using an EK micromixer with conductive sidewalls. The results show that the mixing becomes stronger with increased conductivity value. This method provides a novel and convenient strategy for mixing fluids with the same or similar electrical conductivity in microfluidic systems.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Analytical
Zhong Chen, Yalin Wang, Song Zhou
Summary: This study presents the design and numerical simulations of a passive micromixer and a novel active electroosmotic micromixer. The results show that electroosmosis can effectively induce fluid mixing. The effects of key parameters on the mixing performance were discussed through numerical analysis. The proposed electroosmotic micromixer has a simple structure, fast response, and high mixing index.
Article
Thermodynamics
Junsheng Wang, Qiaoyu Feng, Junzhu Yao, Kai Zhao
Summary: A novel T-type electromagnetic micromixer was proposed by combining the effects of laminar flow with Lorentz force. The effects of various parameters on the fluid mixing in the micromixer were numerically investigated, and the mixing efficiency achieved as high as approximately 97% by adjusting these parameters.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Chemical
Fahizan Mahmud, Khairul Fikri Tamrin, Shahrol Mohamaddan, Nobuo Watanabe
Summary: This study simplifies the manufacturing process and improves mixing performance by externally applying ultrasound and thermal energy upstream of the micromixer. The Dean micromixer shows higher mixing performance compared to T- and Y-micromixers, with about 27% improvement for Reynolds numbers between 40 and 100.
Article
Mechanics
Ekta Tripathi, Promod Kumar Patowari, Sukumar Pati
Summary: In this study, the influence of the shapes of passive micromixers on the mixing efficiency of fluids in microfluidic devices such as Lab on a chip and mu-total analysis systems was investigated. The mixing efficiency of straight, serpentine, and spiral micromixers was compared, while keeping the same axial length of each channel to compact the size of the microfluidic device. Numerical simulations were performed for a range of Reynolds numbers in each micromixer. The results showed that the spiral micromixer had the highest mixing efficiency among all the considered micromixers.
Article
Mechanics
Zhaomiao Liu, Kai Shi, Fanming Cai, Yanlin Ren
Summary: In this paper, the ternary dilute solute lattice Boltzmann model is used to study the mixing processes and mechanisms of solutes inside Janus droplets. The results show that there is a main circulation and a dead zone inside the droplet, and the mixing efficiency is affected by factors such as droplet velocity, tilt angle, and volume ratio. This study provides theoretical support for further improvement of droplet micro-mixer efficiency.
Article
Energy & Fuels
Ahmad Najafpour, Khashayar Hosseinzadeh, Shahin Akbari, Mehdi Mahboobtosi, A. A. Ranjbar, D. D. Ganji
Summary: This study investigates the mixing characteristics of an innovative T-shaped micromixer equipped with a twisted structure using numerical computations. The findings show that the T-shaped micromixer with twisted patterns significantly improves the mixing performance under certain conditions.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Engineering, Chemical
William L. N. Buglie, Khairul Fikri Tamrin, Nadeem Ahmed Sheikh, Mohd Fairus Mohd Yasin, Shahrol Mohamaddan
Summary: A two-dimensional Tesla micromixer was experimentally characterized to analyze its performance under different Reynolds numbers and valve stages. The study found that the low Reynolds number regime showed steady incremental mixing, while the high Reynolds number regime displayed enhanced mixing, particularly at the first valve. This was primarily due to the amplified opposing flow from the helix branch, resulting in stronger chaotic advection in the main microchannel. Interestingly, the measured mixing performance of the two-dimensional micromixer was comparable to that of three-dimensional passive micromixers reported in previous literature.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Energy & Fuels
Zahra Ghorbani Kharaji, Vali Kalantar, Morteza Bayareh
Summary: This paper proposes a high-throughput acousto-inertial micromixer to evaluate the impact of parameters on the passive and active sections of the micromixer. The results show that increasing the applied frequency improves the mixing performance, while increasing the Reynolds number suppresses the acoustic streamings. Reducing the curvature radius and increasing the applied frequency and displacement amplitude also enhance the mixing performance. The proposed micromixer has potential applications in fast chemical and biological reactions and assays.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Multidisciplinary Sciences
Vahabodin Goodarzi, Saeed Hayati Jafarbeygi, Ramezan Ali Taheri, Mikhail Sheremet, Mohammad Ghalambaz
Summary: The study investigates the improvement of mixing efficiency using conductive obstacles with special geometry in micromixers. By changing the span length, concavity direction, and orientation angle of the curved arc plates, as well as using multiple non-symmetric plates, it was found that mixing efficiency can be significantly increased by creating vortices in the flow.
Article
Thermodynamics
Dongjian Zhou, Litao Qin, Jincai Yue, Anming Yang, Zhen Jiang, Shiqing Zheng
Summary: Numerical simulation and experimental studies were conducted to investigate the mixing efficiencies of spiral (S-M) and serpentine (C-S-M) micromixers in different Reynolds number ranges. It was found that the mixing efficiency of C-S-M was lower than S-M, except at Reynolds numbers of 300 and 500. The concept of running cost (RC) was proposed to evaluate the comprehensive efficiencies of the two micromixers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Lei Zhang, Jia Li, Mingxing Liu, Guiying Tian, Penggao Cheng, Jianping Zhang, Na Tang
Summary: A novel internal structure in a facile continuous flow micromixer is developed to enhance mixing effect through computational fluid dynamics (CFD) simulation. The reliability of the simulation is validated by comparing the fluid mixing performance with an authentic transparent micromixer following the mathematical model. The addition of cubic structure inside convex-concave structures improves the mixing index and reduces flow resistance by increasing fluid-to-fluid interface area.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Biochemical Research Methods
Jing-Tang Yang, Yu-Hsuan Lai, Wei-Feng Fang, Miao-Hsing Hsu
Article
Biochemical Research Methods
Wei-Feng Fang, Miao-Hsing Hsu, Yu-Tzu Chen, Jing-Tang Yang
Article
Biophysics
Yu-Tzu Chen, Yen-Cheng Liu, Wei-Feng Fang, Chao-Jyun Huang, Shih-Kang Fan, Wen-Jone Chen, Wei-Tien Chang, Chien-Hua Huang, Jing-Tang Yang
BIOSENSORS & BIOELECTRONICS
(2013)
Article
Engineering, Environmental
Yu-Tzu Chen, Kuan-Hong Chen, Wei-Feng Fang, Sheng-Hung Tsai, Jim-Min Fang, Jing-Tang Yang
CHEMICAL ENGINEERING JOURNAL
(2011)
Article
Engineering, Environmental
Kuan-Hung Chen, Wei-Feng Fang, Yu-Tzu Chen, Jim-Min Fang, Jing-Tang Yang
CHEMICAL ENGINEERING JOURNAL
(2012)
Article
Biochemical Research Methods
Miao-Hsing Hsu, Wei-Feng Fang, Yu-Hsuan Lai, Jing-Tang Yang, Tsung-Lin Tsai, Dar-Bin Shieh
Article
Biochemical Research Methods
Wei-Feng Fang, Shang-Chieh Ting, Ching-Wen Hsu, Yu-Tzu Chen, Jing-Tang Yang
Article
Biochemical Research Methods
Shih-Kang Fan, Cheng-Pu Chiu, Ching-Hsiang Hsu, Shih-Chiang Chen, Li-Lin Huang, Yen-Hao Lin, Wei-Feng Fang, Jem-Kun Chen, Jing-Tang Yang
Article
Nanoscience & Nanotechnology
Yu-Tzu Chen, Wei-Feng Fang, Yen-Cheng Liu, Jing-Tang Yang
MICROFLUIDICS AND NANOFLUIDICS
(2011)
Article
Nanoscience & Nanotechnology
Yu-Tzu Chen, Wei-Chun Chang, Wei-Feng Fang, Shang-Chieh Ting, Da-Jeng Yao, Jing-Tang Yang
MICROFLUIDICS AND NANOFLUIDICS
(2012)
Article
Nanoscience & Nanotechnology
Szu-I Yeh, Wei-Feng Fang, Horn-Jiunn Sheen, Jing-Tang Yang
MICROFLUIDICS AND NANOFLUIDICS
(2013)
Article
Chemistry, Analytical
Wei-Feng Fang, Jing-Tang Yang
SENSORS AND ACTUATORS B-CHEMICAL
(2009)
Article
Chemistry, Analytical
Wei-Feng Fang, Wen-Jone Chen, Jing-Tang Yang
SENSORS AND ACTUATORS B-CHEMICAL
(2014)
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)