Article
Thermodynamics
Kyeong Ho Jang, Seung Ho Yeom, Hyung Ju Lee, Chang Kyoung Choi, Seong Hyuk Lee
Summary: Selective evaporation of binary mixture droplets (BMDs) affects contact line behavior, total evaporation time, and internal flows. The dependence of internal flow and contact line behavior on the relative volatilities of the components of ethanol-water and ethylene glycol-water BMDs was analyzed. The results showed nonmonotonic contact line behavior and the influence of selective evaporation on vorticities and internal circulation flow directions in BMDs. The averaged absolute vorticity was used to identify different stages of internal flow transitions. (c) 2023 Elsevier Ltd. All rights reserved.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Chemical
Yanfang Yu, Peng Yang, Huibo Meng, Huanchen Liu, Jiawei Zhang, Henglei Yu
Summary: This study experimentally investigates the effect of upward two-phase flow in industrial static mixers on dispersion mixing. Empirical correlations and dimensionless correlations are proposed to assess the dispersion performance and gas-liquid pressure drop in the mixer. The critical velocities for flow pattern transition are identified using pressure fluctuation analysis. Additionally, the quantitative effect of gas velocity on frequency and power spectral density function is analyzed.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Environmental Sciences
Haozhe Huang, Shi Zeng, Chao Luo, Tianyu Long
Summary: This study investigates the impact of turbulent pulsation on mass transfer within biofilms. The results show that turbulent pulsation enhances convective mass transfer in biofilms, and is closely correlated with changes in biofilm density and porosity.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Mechanical
Gael Parant, Laurent Zimmer, Antoine Renaud, Franck Richecoeur
Summary: Measuring the time and length of fuel droplet evaporation provides a better understanding of spray dynamics. A new algorithm combining PTV and ILIDS was developed to track the droplets and measure their physical size. Experimental results show that the algorithm successfully follows the droplets during their entire evaporation phase.
EXPERIMENTS IN FLUIDS
(2022)
Article
Chemistry, Multidisciplinary
Bingyao Huang, Haodong Zhang, Zundi Liu, Xiaoyuan Yang, Wei Li, Yuyang Li
Summary: The internal flow fields in the binary droplet combustion of two polyoxymethylene dimethyl ethers (PODEn) are characterized using micro-particle image velocimetry (Micro-PIV). The upward vapor flow around the droplet initiates two radial flows, forming vortex cores near the surface. The content and temperature gradients in the binary droplets induce disturbance to the flows. Evaluation: 8 points.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Chemical
Zhuo Chen, Qiqiang Xiong, Shaowei Li, Yundong Wang, Jianhong Xu
Summary: The study focused on the mass transfer of Rhodamine 6G from droplets to the continuous phase in a coaxial micro-channel using micro-LIF. The results showed that internal circulation inside the droplets enhanced convective mass transfer, with extraction fractions reaching 40%-80%. Different flow rates of dispersed and continuous phases were used to establish a reliable and feasible mass transfer model that demonstrated good agreement between theory and experiment.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Giovanni Marinaro, Christian Riekel, Francesco Gentile
Summary: Aqueous solution droplets can be support quasi contact-free by superhydrophobic surfaces, allowing manipulation and control of biological molecules. Using particle image velocimetry, researchers studied the flow field of water droplets containing polystyrene particles on a super-hydrophobic chip, observing vortex-like motions of particles around the droplet center. The characteristics of the internal flow can be modulated by varying the intensity of the temperature gradient along the drop, influencing how particles are transported based on their size.
Article
Energy & Fuels
Vikas Kumar Sharma, Rupak Bhowmik, Pankaj Tiwari, Anugrah Singh
Summary: This study investigates the pore-scale immiscible displacement processes in a bead-based porous micromodel using fluorescence microscopy and micro-particle image velocimetry techniques. The research focuses on the effect of displacing phase viscosity and flow rate on the displacement mechanism. The study observed phenomena such as shear-induced circulations and viscous instability, as well as the breakage and coalescence of non-wetting phase droplets during the displacement process. The results show that flow rate and viscosity influence the trapped non-wetting phase, with increased flow rate reducing saturation and disintegrating large ganglia into smaller droplets. The study also found that the heterogeneity of the micromodel causes more trapping and lesser mobilization of the non-wetting phase compared to a homogeneous system.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Environmental
Min Yang, Bing Chen, Xiaying Xin, Xing Song, Jiabin Liu, Guihua Dong, Kenneth Lee, Baiyu Zhang
Summary: The research found that the interaction between microplastics and oil, along with dispersants, could reduce the effectiveness of oil dispersion, especially under conditions of increased microplastic concentration and aging.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
M. Abbasi, B. Dastar, N. Afzali, M. Shams Shargh, S. R. Hashemi
Summary: The study demonstrated that zinc supplementation significantly improved eggshell thickness in Japanese quails. There was an intervention effect of ZnO particle size and zinc level on shell breaking strength. Nano ZnO significantly increased egg production percentage.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2022)
Article
Engineering, Chemical
Yanhe Han, Chuantao Wu, Xiaolu Fu, Zhimin Su, Meili Liu
Summary: The study found that the internal circulation iron-carbon micro-electrolysis (ICE) is effective in removing sulfate from wastewater. Sulfate is mainly removed through reduction and flocculation and precipitation mechanisms.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Thomas Anselain, Essam Heggy, Thomas Dobbelaere, Emmanuel Hanert
Summary: More than 20% of global LNG exports and almost all of Qatar's drinking water production come from vulnerable industrial sites on Qatar's eastern coast. By modeling oil-spill dispersal in Qatar's maritime waters, researchers have identified high-risk areas that pose a threat to the nation's LNG export and seawater desalination facilities. The findings suggest that these high-risk areas should be closely monitored to prevent oil spills from disrupting Qatar's LNG exports and exacerbating the global gas crisis.
NATURE SUSTAINABILITY
(2023)
Article
Engineering, Chemical
Li Lei, Yuting Zhao, Xinyu Wang, Gongming Xin, Jingzhi Zhang
Summary: The immiscible liquid-liquid two-phase flows in microchannels were investigated in this study using numerical and experimental methods. The effects of two-phase flow rates and inlet angles on droplet lengths were analyzed, and a predictive model for droplet length was proposed.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Thermodynamics
Lu Shen, Junheng Ren, Fei Duan
Summary: Experimental investigations reveal the linkage of nonuniform interfacial temperature and flow field in an ethanol droplet evaporating on a heated substrate before the final phase of drying. The Benard-Marangoni instability is suggested to be responsible for the regular thermal patterns formed at the evaporating interface. The evolution of deformed Benard-Marangoni convection cells in the sessile droplet is solely dependent on the instant contact angle.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Ceramics
Jili Cai, Gaoyong Xu, Hui Lu, Chenguang Xu, Yifei Hu, Chao Cai, Jinping Suo
Summary: In this study, a piezoelectric micro-droplet jetting approach was successfully utilized to prepare size-controllable Li2TiO3 green pebbles with low coefficients of variation. The size of the green pebbles could be precisely controlled in the range of 0.88-1.37 mm by manipulating the nozzle diameter, the air pressure, and the jetting time. The sintered pebbles exhibited small grain size, satisfactory relative density, and high crush load, indicating their potential as solid tritium breeding materials in fusion reactors.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Zifei Yan, Yunpeng Hu, Chencan Du, Jian Deng, Kai Wang, Guangsheng Luo
JOURNAL OF CATALYSIS
(2020)
Article
Chemistry, Multidisciplinary
Jian Deng, Pengcheng Zou, Kai Wang, Guangsheng Luo
JOURNAL OF FLOW CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
JiaYu Hu, Jiaxin Tian, Kai Wang, Jian Deng, Guangsheng Luo
Review
Engineering, Chemical
Zifei Yan, Jiaxin Tian, Kai Wang, Krishna D. P. Nigam, Guangsheng Luo
Summary: Microreaction processes are increasingly utilized in the synthesis and utilization of epoxide compounds due to their excellent characteristics such as high safety, rapid reactant mixing, and high mass transfer rates. The catalyst loading strategies and transfer characteristics of heterogeneous catalytic microreactors are discussed to illustrate the essence of process intensification in microflow reactors. Strengths and further challenges are proposed to provide a perspective for the development of microreaction technology in the epoxide industry.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Chemical
Xiao Liang, Xueying Wang, Shiyao Lu, Kai Wang, Guangsheng Luo
Summary: Locally constrictive microchannels are effective for droplet break-up in microfluidic processes. This study used pressure drop analysis to experimentally investigate droplet break-up flow, confirmed by Fourier transform analysis. The effects of surfactant concentration, fluid flow rate, and viscosity on droplet break-up were studied, along with the additional hydrostatic energy cost for droplet stretching and deformation.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Chunli Han, Jian Deng, Kai Wang, Guangsheng Luo
Summary: The formation process of monodispersed polysilsesquioxane (PSQ) spheres was revealed for the first time, showing a four-stage mechanism including rapid hydrolysis and growth, formation of aggregates, dispersed particle growth, and slow growth to form monodispersed PSQ spheres. The reversibility of reactions led to the transformation of unstable particles into hydrolytic monomers/oligomers.
Article
Engineering, Chemical
Jiaxin Tian, Chencan Du, Kai Wang, Jian Deng, Guangsheng Luo
Summary: This paper investigates the characteristics of mainly involved reactions and constructs the main reaction network for MBTS synthesis with H2O2 as an oxidant. Several general principles are provided for the controllable preparation of MBTS.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Mechanics
Yi Zong, Min Li, Kai Wang
Summary: This article introduces a new outflow boundary condition for the color gradient model in the multiphase lattice Boltzmann method, based on the phase ratio equation and utilizing the Zou-He boundary condition. Experimental results demonstrate that this new boundary condition can effectively enhance pressure stability and mass conservation characteristics.
Article
Chemistry, Multidisciplinary
Kai Cheng, Shiyao Lu, Kai Wang, Guangsheng Luo
Summary: Using CO2 as terminator, n-hexane as antisolvent, and a flow ROP reactor, a green and sustainable synthetic route for poly(delta-valerolactone) with efficient recycling has been successfully achieved.
REACTION CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Chemical
Qingchuan Chen, Yubin Wang, Kai Wang, Jian Deng, Guangsheng Luo
Summary: This work systematically investigates the scaling-up of microsieve dispersion mixers (MDMs), including sizing-up and numbering-up. The results show that sizing-up improves micromixing performance at low flow rate ratio, while numbering-up is superior in general. Two flow patterns, unrestricted and restricted flows, are observed and distinguished by a dimensionless number. A mathematical model is established to predict the micromixing performance, and a design procedure for scaling up of MDMs is proposed.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Lin Sheng, Shaowei Li, Kai Wang, Yu Chang, Jian Deng, Guangsheng Luo
Summary: This study reveals a strong hysteresis phenomenon in the flow state transition between parallel flow and Taylor flow in gas-liquid microfluidics. Three different flow regions are identified, and the hydrodynamics in the bistable region are controlled by kinetic energy and interfacial energy. It emphasizes the importance of following a suitable operating method for gas-liquid microfluidics.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Environmental
Xinting Liu, Siyuan Zheng, Kai Wang
Summary: Visualized experimental research was conducted to analyze the bubble growth and detachment behaviors on a needle electrode and investigate the voltage-time diagrams of electrochemical reactions in a microchannel reactor. Two types of gas-liquid flow patterns were observed, resulting in different current fluctuations. Quick bubble rupturing was important for maintaining stable electrochemical reactions by preventing ionic conduction blockage. The voltage fluctuation caused by periodic bubble growth and detachment on the electrode exhibited variations in the electrochemical reaction process. The bubble shear-rupture diameter from the electrode was exponential with the capillary number of the electrolyte solution, and the relative diameter of the bubble and electrode was linearly related to the relative voltage fluctuation. The voltage fluctuation was mainly contributed by bubble-induced activation and ohmic overpotentials, with each accounting for approximately 50%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Shenglong Zhang, Kai Wang, Guangsheng Luo
Summary: A parallel scaling-up strategy for the capillary-assembled stepwise microchannel was developed to prepare uniform polystyrene particles with a diameter of ten microns. The strategy generated high-throughput uniform droplets as emulsion templates for the polymerization process. The microchannel droplet generator showed robustness for flow rate deviation and achieved a droplet generation frequency of up to 2.8 x 104 Hz with only four parallel droplet generators.
Article
Engineering, Chemical
Shuyuan Zhang, Haoran Li, Kai Wang, Tong Qiu
Summary: We propose an integrated microfluidic image processing method based on transfer deep learning, which can accelerate the analysis of droplets and bubbles in microfluidic images and accurately determine the critical conditions and size laws of droplets and bubbles based on the recognition results.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Siyuan Zheng, Kai Wang, Guangsheng Luo
Summary: This study proposes an electrolytic approach to synthesize thiuram disulfides based on a microfluidic reactor, achieving high yields and electron utilization efficiency while avoiding waste salt generation and over-oxidation of reaction products.
