Review
Mechanics
Stephen K. Wilson, Hannah-May D'Ambrosio
Summary: The evaporation of a sessile droplet of liquid is a complex and multifaceted fundamental topic. It has drawn significant multidisciplinary research efforts in recent decades due to its key role in numerous physical and biological processes. This review focuses on the insights gained from simple mathematical models and discusses potential future directions in the field.
ANNUAL REVIEW OF FLUID MECHANICS
(2023)
Article
Mechanics
Madeleine R. Moore, Alexander W. Wray
Summary: This study investigates the influence of gravity on solute transport during evaporation of thin droplets. Two asymptotic regimes are identified based on the size of the Bond number. The results provide quantitative predictions of the size, location, and shape of the solute mass profile, taking into account the interplay between advection, diffusion, surface tension, and gravity.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
Abhishek Kaushal, Vishwajeet Mehandia, Purbarun Dhar
Summary: This article investigates the morphing of evaporation kinetics of paramagnetic saline sessile droplets in the presence of a magnetic field stimulus, showing that the evaporation rates are significantly augmented by the magnetic field strength, and the thermo-solutal advection within the droplets is enhanced. The magneto-thermal and magneto-solutal modes of internal ferrohydrodynamics are revealed to be the dominant mechanisms behind the augmented evaporation dynamics, with experimentally obtained internal velocities in excellent compliance with model predictions. These findings have important implications for magnetic field-modulated microfluidic thermal and species transport systems.
Article
Mechanics
Desheng Chen, Tingting Wang, Lining Ming, Man Qiu, Zhe Lin
Summary: This paper investigates the collision of moving droplets with sessile droplets using high-speed photography. The main characteristics of the collision phenomena under different collision speeds and volume ratios are quantified, and the phenomena are explained from an energy analysis perspective. The findings are significant for solving practical engineering problems and improving equipment operation stability.
Article
Thermodynamics
Liansheng Liu, Xuanchen Liu, Wenqi Jia, Wenjia Ren, Liang Tian, Runze Duan
Summary: This study investigates the evaporation characteristics of droplets attached to a high temperature wall, revealing the intense evaporation process in the boiling regime and the transition from static evaporation to nucleate boiling. The study verifies the feasibility of numerical simulation for studying droplet evaporation in the boiling regime, which is consistent with experimental results.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Shangpei Dai, Xuhong Jia, Xiaoyu Zhang, Jing Tang, Junhao Ma, Quanyi Liu, Yulong Zhu
Summary: This study experimentally investigated the evaporation behavior of different fuel droplets on hot surfaces, revealing various thermal patterns and heat transfer mechanisms. The results showed that the evaporation rate of droplets is largely determined by the saturation vapor pressure.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Mechanics
Cosimo Brondi, Nicolo G. Di Novo, Nicola M. Pugno, Giuseppe Mensitieri, Massimiliano Fraldi
Summary: The spread of respiratory diseases through saliva droplets can be affected by the water evaporation process, which influences virus viability. The drying time of virus-laden droplets is influenced by environmental conditions, physical properties, and wetting regime. By simulating the evaporation behavior and drying time of aqueous sodium chloride droplets and a surrogate virus (MS2) under different wetting regimes and ambient conditions, the importance of wetting regimes on evaporation behavior and drying time was revealed.
Article
Thermodynamics
Yang Shen, Feng Kang, Yongpan Cheng, Kai Zhang, Yi Sui
Summary: In this study, theoretical analysis and numerical simulation were conducted to investigate the evaporation of droplets with coupled flow, heat, and vapor transfer fields. The findings show that droplet evaporation can be deteriorated by evaporative cooling effect, while enhanced by internal thermocapillary convection flow and external natural convection. Additionally, a correction factor was proposed to quantify the deviation of actual evaporation rates from those predicted by the isothermal model.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Mechanics
Cecile Lalanne, Quentin Magdelaine, Florence Lequien, Jose-Maria Fullana
Summary: This study investigates two different modes of droplet evaporation – unpinned mode and pinned mode – through numerical simulations and experiments. The volume of the droplet decreases in two phases in the unpinned mode, while it follows a linear decrease in the pinned mode throughout the evaporation process.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2021)
Article
Mechanics
Cecile Lalanne, Anaelle Givaudan, Paul Boumendil, Florence Lequien, Jose -Maria Fullana
Summary: We present experimental findings on the formation of salt deposits during the evaporation of droplets containing sodium chloride. We propose a solutal instability mechanism that is supported by our experimental results and existing literature. Our study provides quantitative data on the crystallization process and its dependence on relative humidity and initial salt concentration.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2023)
Article
Thermodynamics
Saravanan Balusamy, Sayak Banerjee, Kirti Chandra Sahu
Summary: The spreading of respiratory diseases like COVID-19 from contaminated surfaces is largely influenced by the drying time of virus-containing droplets, which is affected by environmental conditions and physical properties. Respiratory droplets contain salt, protein, and surfactant in addition to water, which are expected to impact evaporation significantly.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Biochemical Research Methods
Qi-yue Wang, Gui-ping Zhu
Summary: Active magnetic regulation is an emerging field that focuses on the controllability of ferrofluid droplet spreading and evaporation. The interaction between the liquid and externally applied magnetic field alters the drying process, resulting in a transition from disk-shaped to peak-filled droplets. A numerical model based on the arbitrary Lagrangian-Eulerian method is used to simulate the deformation and evaporation of the droplets, showing that increasing magnetic flux enhances the contact radius and internal flow, thereby promoting the evaporation process. The experimental and numerical investigations both confirm that the externally applied magnetic field accelerates the evaporation process of ferrofluid droplets. The design and optimization of the magnetic field are crucial for regulating droplet evaporation, benefiting industries such as evaporative cooling and inkjet printing.
Article
Chemistry, Physical
Chin-Chi Hsu, You-An Lee, Chun-Hui Wu, C. S. Sujith Kumar
Summary: This study found that increasing temperature significantly influenced changes in surface adhesion force, and the force balance equation demonstrated the existence of a moment of droplet movement.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Thermodynamics
Henry W. Fung, Md. Almostasim Mahmud, Brendan D. MacDonald
Summary: Experiments were conducted to determine the effect of forced convection on the evaporation rate of continuously-fed sessile droplets. The results showed that introducing air flow initially increased the evaporation rate, but the gains plateaued at higher air velocities. Boundary layer formation hindered the benefits of forced convection, indicating that thermal management systems need to utilize raised pedestals or curved surfaces.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Chemistry, Physical
Abdur Rasheed, Shubham Sharma, Prasenjit Kabi, Abhishek Saha, Swetaprovo Chaudhuri, Saptarshi Basu
Summary: The study investigates the deposition of droplets expelled by infected individuals on everyday surfaces, highlighting the importance of interfacial processes and crystallization dynamics in determining the final precipitation pattern and virus particle deposition.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Polymer Science
Ana Mateos-Maroto, Laura Fernandez-Pena, Irene Abelenda-Nunez, Francisco Ortega, Ramon G. Rubio, Eduardo Guzman
Summary: This review provides an updated perspective on the various applications of polyelectrolyte multilayered capsules (PEMUCs) obtained using the Layer-by-Layer (LbL) method in the biomedical field, emphasizing the significant advantages offered by the LbL method for fabricating platforms for different disease detection and treatment.
Article
Chemistry, Physical
Eduardo Guzman, Fernando Martinez-Pedrero, Carles Calero, Armando Maestro, Francisco Ortega, Ramon G. Rubio
Summary: This article introduces the behavior mechanisms of particles trapped at fluid interfaces and their applications in industrial and technological fields. Understanding the physico-chemistry of particle-laden interfaces is essential for preparing different dispersed systems and new interface-dominated devices.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Polymer Science
Laura Fernandez-Pena, Eduardo Guzman, Coral Fernandez-Perez, Irene Barba-Nieto, Francisco Ortega, Fabien Leonforte, Ramon G. Rubio, Gustavo S. Luengo
Summary: Mixtures of polyelectrolytes and surfactants are widely used in technological applications. This study investigates their behavior under dilution and deposition on negatively charged surfaces. The results show that the behavior and deposition cannot be predicted based on simpler mixtures, indicating the complex interactions between different components in multicomponent formulations.
Article
Mathematics, Applied
A. V. Bochkarev, A. I. Zemlyanukhin, A. P. Chetverikov, M. G. Velarde
Summary: The dynamical evolution of a one-dimensional lattice of active units with anharmonic Morse interactions and active-dissipative van der Pol negative friction is studied. The formation and stable propagation of dissipative soliton-like perturbations against a background stationary displacement of units are observed. Analytically solvable models of the leading-front and trailing-tail are obtained, which accurately predict soliton parameters and pedestal values. The formation of N-vertices solitons from a single soliton and (N-1)-vertices soliton is also observed, offering the possibility of controlling the number of vertices in multi-vertices solitons.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Chemistry, Multidisciplinary
Eduardo Guzman, Francisco Ortega, Ramon G. Rubio
Summary: This article discusses the trapping and assembly of particles at fluid interfaces, focusing on the main forces that control these processes and the formation of different ordered structures. This is essential for utilizing these interface systems as platforms for the fabrication of technologically relevant soft materials.
Article
Environmental Sciences
Eugene G. Morozov, Dmitry Frey, Oleg A. Zuev, Manuel G. Velarde, Viktor A. Krechik, Rinat Z. Mukhametianov
Summary: Supercritical hydraulically controlled overflow of Antarctic Bottom Water was observed in the Orkney Passage during field measurements in February 2022. The flow of bottom water from the Weddell Sea to the Scotia Sea passes through the Orkney Passage, where it overflows the sill and undergoes mixing and warming near the foot of the slope.
Article
Biochemistry & Molecular Biology
Carlo Carbone, Eduardo Guzman, Ramon G. Rubio
Summary: This study investigates the concentration dependence of the surface tension of binary mixtures of non-electrolytes at 298.15K. The results indicate the presence of a plateau and a W-shaped behavior in the concentration dependence of the surface tension, which is reported for the first time.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Physics, Fluids & Plasmas
Eduardo Guzman, Armando Maestro, Carlo Carbone, Francisco Ortega, Ramon G. Rubio
Summary: The study of fluid/fluid interfaces is crucial for the development of new materials and the understanding of biological and medical problems. Due to the dynamic nature of the interfaces, it is important to investigate their rheological properties under mechanical stresses. This review focuses on the response of fluid/fluid interfaces to dilational stresses and aims to explore their potential applications in science and technology.
Article
Chemistry, Physical
Ana Mateos-Maroto, Jose E. F. Rubio, Sylvain Prevost, Armando Maestro, Ramon G. Rubio, Francisco Ortega, Eduardo Guzman
Summary: The internal organization of polyelectrolyte layers deposited on colloidal templates has a significant impact on their potential applications as drug delivery capsules. Through experiments, it has been revealed that the arrangement of oppositely charged polyelectrolyte layers on positively charged liposomes can be modulated by sequential deposition, which affects the structure and properties of the capsules. This provides an interesting route for designing encapsulation materials with controlled properties by tuning the characteristics of the last deposited layers.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Review
Pharmacology & Pharmacy
Eduardo Guzman, Francisco Ortega, Ramon G. Rubio
Summary: Recently, the availability of effective vaccines has become a public health challenge due to different pandemic outbreaks. Manufacturing new formulations providing a robust immune response against specific diseases is of paramount importance. The Layer-by-Layer (LbL) method, based on nanostructured materials, offers promising tools for designing and optimizing effective vaccination platforms.
Article
Polymer Science
Laura Fernandez-Pena, Eduardo Guzman, Teresa Onate-Martinez, Coral Fernandez-Perez, Francisco Ortega, Ramon G. Rubio, Gustavo S. S. Luengo
Summary: This work investigates the effect of dilution on the phase separation process of binary charged polysaccharide-surfactant mixtures formed by two cationic polysaccharides and up to four surfactants of different nature. The results showed that dilution behavior of concentrated polysaccharide-surfactant mixtures cannot be described using classical precipitation framework. Even highly charged complexes can undergo phase separation and enhanced deposition.
Article
Chemistry, Multidisciplinary
Carlo Carbone, Alejandra Rubio-Bueno, Francisco Ortega, Ramon G. Rubio, Eduardo Guzman
Summary: This study investigates the surface modification of silica nanoparticles using an amphiphilic triblock copolymer, Pluronic F-127. The results show that the interaction between Pluronic F-127 and silica nanoparticles leads to the formation of copolymer-decorated particles, with changes in hydrodynamic diameter and effective charge depending on the concentrations of the copolymer and particles. This has important implications for controlling the adsorption and rheological properties of the decorated nanoparticles at fluid-fluid interfaces.
APPLIED SCIENCES-BASEL
(2023)
Review
Biochemistry & Molecular Biology
Eduardo Guzman, Francisco Ortega, Ramon G. Rubio
Summary: The cosmetic industry needs to develop eco-friendly products, and chitosan is a promising ingredient for the design of skin and hair care cosmetics.
Review
Biochemistry & Molecular Biology
Eduardo Guzman, Francisco Ortega, Ramon G. Rubio
Summary: The manufacturing of stable emulsion is a crucial challenge for the cosmetics industry. Particle-stabilized emulsions (Pickering emulsions) offer advantages over conventional emulsions and can open new opportunities for cosmetic formulators. Therefore, optimizing the fabrication procedures of Pickering emulsions and exploring their applicability in different cosmetic formulations are necessary.
Article
Chemistry, Physical
Andres Gonzalez-Gonzalez, Natalia Sanchez-Arribas, Eva Santini, Jose Luis Rodriguez-Villafuerte, Carlo Carbone, Francesca Ravera, Francisco Ortega, Libero Liggieri, Ramon G. Rubio, Eduardo Guzman
Summary: Pickering emulsions stabilized by the interaction of palmitic acid and silica nanoparticles have been studied. The interaction between palmitic acid and SiNPs has a synergistic effect on emulsion stabilization, resulting in enhanced emulsion stability. The formation of fatty acid-nanoparticle complexes driven by hydrogen bond interactions leads to particle attachment at the fluid interface, creating a rigid armor that minimizes droplet coalescence. The nature of the emulsions is determined by the hydrophobic mismatch between the alkane chain and the hydrophobic chain of palmitic acid.
COLLOIDS AND INTERFACES
(2022)
