Article
Engineering, Chemical
Ali Kalantarifard, Elnaz Alizadeh-Haghighi, Caglar Elbuken
Summary: This study demonstrates a universal method for high monodispersity droplet generation, which is immune to external fluctuations originating from the imperfection of the flow source. The method is applicable to other common microfluidic devices and flow sources.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Bahram Talebjedi, Ali Abouei Mehrizi, Behnam Talebjedi, Seyed Sepehr Mohseni, Nishat Tasnim, Mina Hoorfar
Summary: Controlling droplet breakup characteristics is crucial for droplet microfluidics in biomedical applications. This study developed a prediction platform to forecast droplet size, frequency, and quality, and evaluated the hydrodynamical breakup characteristics. Comparison of neural network-based prediction platforms showed that the MLP model outperformed the LDA model in droplet quality and regime prediction.
Article
Engineering, Environmental
Langyu Liu, Shaokun Jiang, Chunying Zhu, Youguang Ma, Taotao Fu
Summary: The experimental study focused on the liquid-liquid distribution and droplet dynamics in branching T-junction microchannels. Different droplet flow patterns were identified in the main channel and the effects of flow rates and crossing flow on two-phase distribution were described. The analysis and prediction of two-phase distribution achieved a good prediction effect on liquid-liquid two phases distribution in branching microchannels.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Green & Sustainable Science & Technology
Pei Lu, Li Zhao, Nan Zheng, Shengli Liu, Xiaobing Li, Xing Zhou, Jingbo Yan
Summary: This paper presents a systematic literature review of the flow mechanism and simulation methods of two-phase flow separation in T-junctions, summarizing the flow behavior, evolution of droplets and particles, and mass transfer at the junction. The applied numerical models and validation methods are introduced. The results show that the Eulerian-Eulerian model and VOF multiphase model have achieved satisfactory performance in simulating gas-liquid separation ratios, and improving the accuracy of these models can lead to a deeper understanding of the separation mechanism.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Thermodynamics
Zongrui Feng, Huixiong Li, Wai Lam Loh, Xianliang Lei, Jialun Liu, Kaikai Guo
Summary: The distribution characteristics of gas-liquid two-phase flow of refrigerant mixtures R134a in the vertically-upward T-junction were studied using 3D numerical simulation. The results showed that the fraction of the gas phase flowing through the branch decreased with an increase in inlet quality, and the liquid phase distribution was non-uniform at the intersection zone.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Article
Thermodynamics
Vasyl Ruzaikin, Ivan Lukashov, Andrii Breus, Tetiana Fedorenko
Summary: Phase separation occurs in every system and device with a T-junction used in a two-phase line, making it crucial to predict it accurately for successful designing of refrigeration, thermal control, and fluid transport systems. Testing was conducted on three simple T-junctions with different inlet and side diameters, using two-phase ammonia at a saturation level of 40/60 degrees C and mass velocities of 25/150 kg·m(-2)·s(-1). Based on the test data, it was found that the phase separation behavior is independent of inlet mass velocity, vapor quality, void fraction, flow patterns, and relative side branch diameter when the relative side branch mass flow rate exceeds 0.6. A simplified empirical correlation was proposed with an error margin of +/- 15% to describe the ammonia test points.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Article
Engineering, Chemical
Zhe Yan, Haoxiang Huang, Shanshan Li, Wei Wang, Zhenhai Pan
Summary: A three-dimensional numerical model was developed to study the flow structure, bubble dynamics, and heat transfer of an evaporating two-phase flow in a heated micro T-junction. The study found that the inlet Reynolds number and seed bubble volume have significant effects on the flow structure and heat transfer.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Changshuang Zhi, Liu Liu, Pengfan Chen, Yingwen Liu
Summary: A numerical model for liquid-liquid two-phase flow in a T-junction was established based on Eulerian and k-epsilon viscous models. The simulation results were in good agreement with experimental data, showing that separation efficiency is influenced by mass fraction taken off through branch and mixture velocity. Pressure drop characteristics were mainly caused by local resistance at the intersection and frictional resistance in the pipe, as well as gravity in the branch, with a vortex region at the inlet of the outlet pipe causing pressure losses.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
Changshuang Zhi, Yixiao Zhang, Chao Zhu, Yingwen Liu
Summary: The study analyzed the two-phase flow pressure drop of refrigerants in a horizontal branching T-junction through numerical simulation and artificial neural network, establishing a predicting model for the local pressure drop coefficients. The results showed that vortexes in the entrance of branch pipe and high mass flow split ratio led to pressure fluctuations and descending-ascending static and total pressure, with the best predicting abilities found in GA-BPNN and PSO-BPNN models. Sensitivity analysis revealed mass flow split ratio and inlet quality as significant factors for pressure drop coefficients in different T-junction configurations.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Engineering, Mechanical
Aswin Jagadeesh Ammanath, Sangram Kumar Samal, Manoj Kumar Moharana
Summary: A two-dimensional numerical study was conducted to investigate the phase distribution of Taylor bubble flow and the bubble breakup behavior at two junctions in multi cross-branched microchannels. The study revealed significant differences in phase distribution characteristics with changes in geometries.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Engineering, Chemical
Ming Zhang, Yuehong Cui, Weizheng An, Haiyan Wang, Lisong Wang, Shuo Liu
Summary: This study develops a new mechanical model based on force analysis to predict the liquid carryout threshold in T-junctions. The effect of the orientation of the side arm on separation efficiency is investigated using computational fluid dynamics. The results show that the angle of the side arm has an impact on the liquid carryover threshold, while the liquid-carrying performance in the side arm is not affected. The new model is validated through experimental data and achieves accurate prediction of the liquid carryout threshold.
Article
Thermodynamics
Jiawei Fu, Zhenhua Liu, Xingyang Yang, Sumin Jin, Jilei Ye
Summary: This paper experimentally investigated the performance of a compound T-junction in separating the vapor-liquid two-phase zeotropic mixtures R134a/R245fa. The effect of inlet vapor quality and mass flow rate on the separation performance was studied, and the performance of compound T-junction was compared with simple T-junction. The paper also discussed the separation models for both types of T-junctions. The experimental results showed that the composition separation efficiency could be increased by adjusting the inlet vapor quality and mass flow rate, and the compound T-junction exhibited better separation performance compared with the simple T-junction. The developed separation model for the compound T-junction had a coefficient of determination of 0.9662.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2023)
Article
Computer Science, Interdisciplinary Applications
Milad Isanejad, Keivan Fallah
Summary: In this study, numerical simulations are performed to investigate droplet breakup in an asymmetric T-junction microchannel. The results show good agreement with previous studies, and the effects of capillary number, non-dimensional droplet length, and non-dimensional width ratio on the breakup time and splitting ratio are studied. It is also found that the mass center of the mother droplet is shifted to a wider branch, facilitating the asymmetric breakup in the T-junction microchannel.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2022)
Article
Mechanics
Maryam Maghazeh, Hossein Pishbin, Mahdi Navidbakhsh, Esmail Pishbin
Summary: This study presents a novel approach for generating stratified flow and slug flow for biochemical applications using centrifugal microfluidics. The technique involves stratifying liquid using centrifugal force and trapping bubbles between liquid plugs to form a slug flow. The fluidic behavior of the system is comprehensively characterized using a multiphase numerical model, and the results show that slug flow can significantly enhance the mixing efficiency compared to single-phase or stratified flow.
Article
Environmental Sciences
M. De la Cruz-Avila, I Carvajal-Mariscal, Leonardo Di G. Sigalotti, Jaime Klapp
Summary: This study numerically evaluates the effects of different injection configurations on the behavior and evolution of a two-phase flow through a staggered Y-junction pipeline. The results show that the supply configuration and the velocities of the phases have significant impacts on the development of the main flow and the flow patterns. The study highlights the need for caution in selecting the injection supply system to achieve better flow blending.
Article
Engineering, Chemical
Ali Kalantarifard, Elnaz Alizadeh Haghighi, Caglar Elbuken
CHEMICAL ENGINEERING SCIENCE
(2018)
Article
Materials Science, Multidisciplinary
Elnaz Alizadeh-Haghighi, Aisan Khaligh, Ali Kalantarifard, Caglar Elbuken, Donus Tuncel
Summary: Microscale monodisperse droplets are used to generate nanowalled supramolecular microcapsules using microfluidics. The method allows for high reproducibility, high throughput manipulation, and control over hierarchical structure, shape, and size.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Chemical
Ali Kalantarifard, Elnaz Alizadeh-Haghighi, Caglar Elbuken
Summary: This study demonstrates a universal method for high monodispersity droplet generation, which is immune to external fluctuations originating from the imperfection of the flow source. The method is applicable to other common microfluidic devices and flow sources.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Biochemical Research Methods
Abtin Saateh, Ali Kalantarifard, Oguz Tolga Celik, Mohammad Asghari, Murat Serhatlioglu, Caglar Elbuken
Article
Chemistry, Multidisciplinary
Pinar Beyazkilic, Abtin Saateh, Mehmet Bayindir, Caglar Elbuken
Review
Chemistry, Analytical
Ali Kalantarifard, Abtin Saateh, Caglar Elbuken
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)