Article
Chemistry, Physical
Takahiro Homma, Tokiya Yamashita, Ryohei Wada, Koki Kawazu, Kizuku Kurose, Takahiro Tsukahara, Ichiro Ueno
Summary: The formation mechanism of multicellular structures in a thin liquid film driven by thermocapillary effect is investigated through experiments and numerical simulations. It is found that the number of cells increases stepwise as the liquid film width increases, with new cell pairs emerging each time. The wavelength of the multicellular structure is determined and compared to that of conventional Marangoni-Benard convection.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Mechanics
Qingzhen Yang, Yankui Liu, Xinmiao Jia, Tingting Zhang, Fenhong Song
Summary: This article introduces the characteristics of thermocapillary instability and the method of using it to fabricate micro/nano-polymeric structures. It proposes a fully nonlinear numerical model based on the phase field method to study the dynamic process and influencing factors of thermocapillary instability, and explores the instability under multi-mode conditions.
Article
Mathematics, Applied
Souradip Chattopadhyay, Hangjie Ji
Summary: This study investigates the behavior of a thin liquid with odd viscosity effects as it flows down a uniformly heated, slippery inclined plane, where the liquid's time-reversal symmetry is broken. Two models, the Benney-type equation model (BEM) and the weighted residual model (WRM), are constructed to account for the combined effects of slip length, thermocapillarity, and odd viscosity. The study finds that the introduction of odd viscosity plays an important role in stability.
PHYSICA D-NONLINEAR PHENOMENA
(2023)
Article
Robotics
Franco N. Pinan Basualdo, A. Bolopion, M. Gauthier, P. Lambert
Summary: Future developments in micromanufacturing will require advances in micromanipulation tools, with the air-water interface being an important medium that provides a good balance for manipulating micro-objects. ThermoBot, a microrobotic platform driven by a thermocapillary flow, can achieve velocities up to 10 times the body length per second.
Article
Physics, Applied
Yi Hua Chang, Sandra M. Troian
Summary: For decades, researchers have been exploring pattern-forming instabilities in free surface thin films in the hope of developing alternative lithographic techniques. However, the presence of noise during the formation process has hindered progress. In this study, the focus is on thermocapillary instability and how spatially periodic modulation of the thermal field can induce synchronized growth of highly uniform periodic arrays.
PHYSICAL REVIEW APPLIED
(2022)
Article
Thermodynamics
D. S. Klyuev, V. M. Fliagin, S. Semenov, N. A. Ivanova
Summary: Characterizing laser-induced thermocapillary deformation has significant importance in measuring physicochemical properties, solving dry spots formation, and thermal physics. Using the modified Agnesi function can significantly reduce experiment time and result processing efficiency.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Shubha Agrawal, Prasanta K. Das, Purbarun Dhar
Summary: This study demonstrates the interaction between substrate topology, temperature stimulus, and wall slip in generating thermo-capillarity in thin liquid films. Analytical solutions for the thermal and hydrodynamic fields are obtained. The significance of different parameters on the thermo-fluid dynamics is also explored.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Physics, Fluids & Plasmas
Qingzhen Yang, Yankui Liu, Xinmiao Jia, Tingting Zhang, Hongmiao Tian, Jing Fan, Quange Xu, Fenhong Song
Summary: In this study, a two-phase flow numerical model was developed to investigate the dynamic process of thermocapillary patterning. The effects of parameters such as temperature, geometry parameters, and contact angle were also examined.
Article
Biophysics
Mojtaba Khorramnezhad, Babak Akbari, Mahdokht Akbari, Mahshid Kharaziha
Summary: The study aimed to surface modify PCL film by gelatin coating to improve cell attachment. Results demonstrated that gelatin modification significantly enhanced mechanical properties and biological characteristics of PCL film, providing a promising approach for the development of bone tissue engineering scaffolds.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Multidisciplinary Sciences
Nikita Kavokine, Marie-Laure Bocquet, Lyderic Bocquet
Summary: This study develops a quantum theory of the solid-liquid interface, revealing a new contribution to friction due to the coupling of charge fluctuations in the liquid to electronic excitations in the solid. The research demonstrates a marked difference in quantum friction between the water-graphene and water-graphite interface, potentially explaining the radius-dependent slippage of water in carbon nanotubes.
Article
Mathematics, Applied
M. A. Aljohani, P. K. Jimack, M. A. Walkley
Summary: A new multigrid-based algorithm is proposed for solving the discretized lubrication equations commonly used to model thin film flow phenomena. The algorithm utilizes a Newton-Krylov solver for solving the resulting nonlinear algebraic systems of equations. The key innovation is the introduction of a block-based preconditioner incorporating algebraic multigrid (AMG) techniques, enabling their application in thin film flow problems for the first time. Computational testing shows that the proposed algorithm offers substantial advantages over other state-of-the-art multigrid methods.
APPLIED NUMERICAL MATHEMATICS
(2023)
Article
Thermodynamics
Elaine Lim, Tze Cheng Kueh, Yew Mun Hung
Summary: This study investigates the inverse thermocapillary effect in an evaporating thin liquid film of self-rewetting fluid, where positive surface tension gradients induce inverse-thermocapillary flow and significantly enhance evaporation rates.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Article
Nanoscience & Nanotechnology
M. Verma, R. Mukherjee
Summary: In this work, we use a three-dimensional phase-field model to understand the mechanism of corner instability during capillary-driven hole growth in a single-crystalline free-standing thin film. We systematically study the effects of crystalline anisotropy in surface energy, surface diffusivity, and film thickness on hole growth. Our simulations reveal that the instability during hole growth is caused by the saturation of rim height at the corner, which is determined by the anisotropy in surface energy. Furthermore, our investigation shows the presence of a time-invariant shape of the corner with the onset of corner instability.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Multidisciplinary
Anand S. Bharadwaj, Joerg Kuhnert, Stephane P. A. Bordas, Pratik Suchde
Summary: In this paper, a discrete droplet method (DDM) model is proposed to simulate the formation, evolution, and break-up of a thin film of fluid flowing over a curved surface. The model tracks individual moving fluid droplets to capture the evolution of thin fluid films. The DDM is thoroughly validated and shows effectiveness in simulating flows with thin films.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Materials Science, Ceramics
Xu Jiang, Jie Sun, Xiaojie Chai, Yifan Chen, Wei Zhang, Jun Jiang, Anquan Jiang
Summary: The study found that the wall current varies with the angle between the applied electric field and the initial polarization, and that the oxygen vacancy concentration can be controlled through thermal annealing, affecting the magnitude of the domain wall current.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Qingchun Song, Youchuang Chao, Yage Zhang, Ho Cheung Shum
Summary: The method of achieving all-aqueous Janus droplets through liquid-liquid phase separation allows for applications in biocompatible fields. Janus droplets can be controlled in size and shape through microfluidics and electrospray, and can simultaneously load two different liposomes as drug carriers.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Mechanics
Rong Liu, Zijing Ding
Summary: The dynamics of a thick liquid film flowing down a vertical fibre were studied using a domain mapping technique to solve Navier-Stokes equations. Three distinct flow regimes were investigated, with regimes 'a' and 'b' showing excellent agreement with travelling wave solutions. The time-periodic flow regime 'c' also exhibited similarities to direct numerical simulation results.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Hao Yuan, Jingxuan Tian, Youchuang Chao, Yuh-Shiuan Chien, Ren-Hao Luo, Jun-Yu Guo, Shanshan Li, Yi-Ju Chou, Ho Cheung Shum, Chien-Fu Chen
Summary: ddLAMP is a crucial pathogen detection technique, and the simplified version developed significantly reduces operational difficulty and equipment requirements, making it accessible even to untrained personnel.
Article
Physics, Fluids & Plasmas
Youchuang Chao, Lailai Zhu, Hao Yuan
Summary: The study investigates the Rayleigh-Taylor instability of gravity-driven viscous liquid films flowing under a uniformly heated or cooled inclined substrate. It finds that the thermocapillary stress can significantly affect the stability of the liquid film, enhancing or suppressing instability. Specific critical values can completely inhibit instability or trigger absolute instability.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Chemistry, Physical
Yage Zhang, Chentianyi Yang, Shuai Yuan, Xiaoxue Yao, Youchuang Chao, Yang Cao, Qingchun Song, Alban Sauret, Bernard P. Binks, Ho Cheung Shum
Summary: The experiment demonstrated the influence of different particle coverings on liquid marbles in the electrocoalescence process, resulting in four different morphologies. Small particles showed little resistance to coalescence, while marbles coated by large particles demonstrated a viscous-like behavior.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Computer Science, Interdisciplinary Applications
Shizhe Jiao, Zhenlin Zhang, Kai Wu, Lingyun Wan, Huanhuan Ma, Jielan Li, Sheng Chen, Xinming Qin, Jie Liu, Zijing Ding, Jinlong Yang, Yingzhou Li, Wei Hu, Lin Lin, Chao Yang
Summary: KSSOLV is a MATLAB toolbox for performing Kohn-Sham density functional theory (DFT) calculations with a plane-wave basis set. It is used to study the electronic structures of molecules and solids, and includes new functionalities and algorithms for improved performance.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Baole Wen, Zijing Ding, Gregory P. Chini, Rich R. Kerswell
Summary: This article discusses the bounds of heat transport in Rayleigh-Benard convection, with upper estimate following a 5/12 scaling and lower estimate capturing a 1/3 scaling successfully.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Shipei Zhu, Ganhua Xie, Huanqing Cui, Qingchuan Li, Joe Forth, Shuai Yuan, Jingxuan Tian, Yi Pan, Wei Guo, Yu Chai, Yage Zhang, Zhenyu Yang, Ryan Wing Hei Yu, Yafeng Yu, Sihan Liu, Youchuang Chao, Yinan Shen, Sai Zhao, Thomas P. Russell, Ho Cheung Shum
Summary: Researchers have developed ultrasoft liquid robots called aquabots using aqueous phase-separation induced self-assembly. These robots have hierarchical structures ranging from nanoscopic to microscopic scales and can overcome deformability constraints. They can adapt their shape for gripping and transporting objects, and can be used for targeted photocatalysis, delivery, and release in confined and tortuous spaces. This technology has potential applications in medical micromanipulation, targeted cargo delivery, tissue engineering, and biomimetics.
Article
Multidisciplinary Sciences
Youchuang Chao, Olinka Ramirez-Soto, Christian Bahr, Stefan Karpitschka
Summary: The research investigates the coupling between liquid-liquid phase separation and the spreading motion of three-phase contact lines, finding that the classical Cox-Voinov law is no longer applicable and observing spreading beginning well before any visible nucleation of microdroplets. The study suggests that evaporation-induced enrichment, together with surface forces, causes an earlier nucleation in the wetting precursor film, initiating the observed wetting transition.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Multidisciplinary
Jinjie Hao, Shijie Xie, Qing Huang, Zijing Ding, Hua Sheng, Chuang Zhang, Jiannian Yao
Summary: A study has discovered spin-enhanced electrocatalytic activity for CO2 reduction on oxide-derived copper catalyst, and has explained the role of magnetic moment in catalytic reactions. The study also found that spin enhancement can promote CO2 reduction, leading to increased Faradaic efficiency and selectivity.
Article
Pharmacology & Pharmacy
Zhifeng Huang, Zijing Ding, Yangting Xu, Caiyun Xi, Liqiong He, Hui Luo, Qulian Guo, Changsheng Huang
Summary: Regulation of gene transcription in the spinal dorsal horn (SDH) through the transcription factor STAT2 plays a crucial role in the development of neuropathic pain. Chronic constriction injury of the rat sciatic nerve led to the downregulation of nuclear STAT2 in the SDH, which was associated with increased microglial activation and the development of neuropathic pain. In addition, siRNA-induced downregulation of STAT2 promoted microglial activation and pro-inflammatory cytokine expression in the SDH. Restoring nuclear expression of STAT2 could potentially be a therapeutic pathway for treating neuropathic pain.
FRONTIERS IN PHARMACOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Qing Huang, Shijie Xie, Jinjie Hao, Zijing Ding, Chuang Zhang, Hua Sheng, Jincai Zhao
Summary: In this study, we highlight the important role of spin polarization in proton-transfer-mediated water oxidation over a magnetized catalyst. The electrochemical oxygen evolution reaction (OER) over ferrimagnetic Fe3O4 exhibited a significant increase in current when subjected to an external magnetic field, with a 20-fold higher increment at weakly alkaline pH (pH 9) compared to strongly alkaline conditions (pH 14). Surface modification experiments and H/D kinetic isotope effect investigations revealed that the magnetized Fe3O4 catalyst polarizes the spin states of nucleophilic attacking intermediates during the nucleophilic attack of Fe-IV=O by molecular water at weakly alkaline pH. The synergistic occurrence of spin-enhanced singlet O-H cleavage and triplet O-O bonding promotes O-2 generation more significantly than the case involving only spin-enhanced O-O bonding under strongly alkaline conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Mechanics
Zijing Ding, Zhen Ouyang
Summary: This paper investigates heat transport in penetrative convection with a marginally stable temporal-horizontal-averaged field or background field. It proposes an eigenvalue problem that obtained by truncating the nonlinear terms and derives an analytical scaling law for heat transport in penetrative convection. The paper also introduces an alternative approach, the quasilinear approach, to incorporate a more physically plausible constraint and compares the results with the previous studies.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Engineering, Aerospace
Zhen Ouyang, Rong Liu, Zijing Ding
Summary: This study investigates the Rayleigh-Benard-Marangoni instability in a bilayer system of self-rewetting fluid overlying a porous medium. By considering the self-rewetting properties of the fluid, it is found that certain combinations of parameters result in a bimodal marginal curve and mode transition of convection.
MICROGRAVITY SCIENCE AND TECHNOLOGY
(2022)
Article
Physics, Fluids & Plasmas
Weiyang Jiang, Zijing Ding
Summary: This paper uses a long-wave model to examine how curvature elasticity modifies the famous Plateau-Rayleigh mechanism and the formation of viscous beads on a vertically placed fiber. The effects of spontaneous curvature, surface bending rigidity, Gaussian curvature, and Van der Waals forces are examined, with spontaneous curvature and surface bending rigidity stabilizing the interface while Gaussian curvature accelerates the rupture of the film.
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)
