Article
Chemistry, Multidisciplinary
Mohammad-Reza Ahmadian-Yazdi, Morteza Eslamian
Summary: This paper investigates the evaporation and deposition of a perovskite thin liquid film on a hydrophilic substrate, with a focus on the flow patterns within the film and the impact of ultrasonic vibrations on the flow uniformity. The study reveals the mechanics of evaporation and deposition processes in thin liquid films, attributing flow patterns to surface-tension-induced Marangoni flows and ruling out buoyancy-induced convection. Additionally, thermography results show agreement between temperature maps and flow patterns on the film surface, with ultrasonic vibrations enhancing micromixing for more uniform flow patterns.
Article
Mechanics
Divij Kishal, Raj Nandini, Naveen Tiwari
Summary: The stability analysis of a gravity-driven thin liquid film over a uniformly heated substrate is conducted, with a focus on the impact of an insoluble surfactant. The study reveals the critical conditions for temporal instability and characterizes the instability as absolute and convective. The findings highlight the significant role of non-dimensional parameters, particularly the Marangoni number, in determining the film dynamics and stability.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2023)
Article
Multidisciplinary Sciences
Anna Samoilova, Evelina V. Permyakova
Summary: This study investigates the dynamics of a thin liquid film on a heated substrate with low thermal conductivity. A direct numerical simulation of the long-wave Marangoni instability is performed using coupled partial differential equations derived within the lubrication approximation. Comparisons with previous weakly nonlinear analysis show good qualitative agreement near the convective threshold. The results demonstrate square root dependence of amplitudes on supercriticality and hysteresis in subcritical excitation, as well as the emergence of secondary humps leading to film rupture in highly supercritical cases.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Multidisciplinary Sciences
Alireza Hooshanginejad, Sunghwan Jung
Summary: We experimentally investigate the interfacial instability that occurs when a water droplet is deposited on a glycerol-water solution. Despite the lack of surface tension to stabilize the undulations, we observe the growth and pinching off of finite-size fingers from the droplet. This behavior is a result of the balance between outward buoyancy and inward Marangoni flow.
Article
Chemistry, Physical
Melika Motaghian, Erik van der Linden, Mehdi Habibi
Summary: This study investigates the influence of surfactant-surfactant interaction on Marangoni spreading. The results show that the molecular structures and interactions between surfactants in the droplet and the soap film significantly influence the spreading scenario.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Polymer Science
Max Toensmann, Philip Scharfer, Wilhelm Schabel
Summary: A new empirical correlation is proposed to predict the critical solutal Marangoni number in drying polymer films, considering short-scale convective Marangoni (in)stabilities with accurate description of the entire drying process. Additionally, the correlation may facilitate future process design for thin films and deliberate self-assembly.
Article
Mechanics
Richard Mcnair, Oliver E. Jensen, Julien R. Landel
Summary: This study investigates the advective Marangoni spreading of insoluble surfactant in a viscous fluid within a two-dimensional rectangular cavity, revealing singular flow structures near contact lines and logarithmically diverging pressure fields. The singularities at stationary contact lines are associated with dynamic compression of the surfactant monolayer, which can be regularised by weak surface diffusion. These findings underscore the importance of careful treatment in computations of unsteady advection-dominated surfactant transport in confined domains.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Physical
Madeline L. Sauleda, Tsung-Lin Hsieh, Wangrun Xu, Robert D. Tilton, Stephen Garoff
Summary: Surfactant-driven Marangoni spreading generates a fluid flow characterized by an outwardly moving Marangoni ridge. Spreading on thin and/or high viscosity subphases, as most of the prior literature emphasizes, does not allow the formation of capillary waves. On deep, low viscosity subphases, Marangoni stresses may launch capillary waves coupled with the Marangoni ridge, and new dependencies emerge for key spreading characteristics on surfactant thermodynamic and kinetic properties.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
R. Egorov, S. Y. Misyura, V. S. Morozov, A. S. Zaitsev
Summary: This experimental study investigates the aggregation of TiO2 microparticles and the self-organization of clusters in a thin layer of water. The complex behavior of the cluster, with periodic changes in particle sizes and cell numbers, is observed under local heating. Furthermore, it is shown that stability of convective cells is lost and the cluster disintegrates partially when particle and coagulated particle diameters reach their maximum.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Mechanical
He Liang, Peiyi Yang, Wenzhong Wang, Yanfei Liu, Xiangyu Ge, Baohong Tong
Summary: A test rig was constructed to study the spreading behavior of oil droplets impacting solid surfaces. Quantitative measurements of the oil layer thickness during droplet spreading were made using laser-induced fluorescence techniques from the frontal view, while the shape evolution of the droplets was observed from the lateral view. The study investigated the spreading patterns on dry surfaces and surfaces with different thin liquid film thicknesses, considering the effects of viscosity and film thickness. The results showed that increased viscosity led to increased spreading factor, central layer thickness, and retraction, while thicker liquid films weakened retraction.
Article
Mechanics
Anurag Pant, Baburaj A. Puthenveettil, Sreeram K. Kalpathy
Summary: We studied the formation of surface tension driven plumes at the periphery of expanding ethanol-water films. Measurements were conducted on the lengths, radial velocities, and azimuthal spacings of the plumes, which were found to agree with the predictions of a model based on the balance of surface tension force and viscous resistance. The observed variation in the azimuthal spacing did not match existing instability theories.
Article
Pharmacology & Pharmacy
Denali K. Dahl, Ashlyn N. Whitesell, Preetika Sharma-Huynh, Panita Maturavongsadit, Rima Janusziewicz, Ryan J. Fox, Henry T. Loznev, Brian Button, Allison N. Schorzman, William Zamboni, Jisun Ban, Stephanie A. Montgomery, Erin T. Carey, S. Rahima Benhabbour
Summary: Vestibulodynia (VBD) is a pain disorder characterized by erythema and pain of the vulvar vestibule, and the current first line treatment involves local application of topical anesthetics. However, treatment options are limited due to anatomical constraints and imprecise dosing.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
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
Materials Science, Multidisciplinary
Cong Xie, Wen Wang, Changkun Li, Qichun Nie, Lulu Sun, Wenwu Zeng, Fei Qin, Tiefeng Liu, Xinyun Dong, Hongwei Han, Haisheng Fang, Dewen Zhao, Yinhua Zhou
Summary: A water transfer printing method based on solid-solid contact and assisted by Van der Waals force is reported, allowing deposition of nanometer-thick films on various surfaces; water plays a crucial role in helping unfold the nanometer-thick films; this method can be used to demonstrate electronic and optoelectronic devices on wrinkled skin and curved surfaces.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Engineering, Chemical
Ines Nulens, Adi Ben Zvi, Ivo F. J. Vankelecom, Guy Z. Ramon
Summary: The article proposes a method that links synthesis and morphology to study the relationship of thin-film polyamide selective layers prepared via interfacial polymerization (IP), focusing on the interfacial stability of the system and the morphological shift of the film. By analyzing the correlation between PA morphology and the defined parameter space, a better understanding of the physical phenomena and potential issues in the IP process can be achieved.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
A. Susarrey-Arce, A. Marin, A. Massey, A. Oknianska, Y. Diaz-Fernandez, J. F. Hernandez-Sanchez, E. Griffiths, J. G. E. Gardeniers, J. H. Snoeijer, Detlef Lohse, R. Rayal
Article
Mechanics
Tariq Alghamdi, Sigurdur T. Thoroddsen, J. F. Hernandez-Sanchez
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2019)
Article
Physics, Multidisciplinary
J. F. Hernandez-Sanchez, L. A. Lubbers, A. Eddi, J. H. Snoeijer
PHYSICAL REVIEW LETTERS
(2012)
Article
Multidisciplinary Sciences
Andres A. Aguirre-Pablo, Meshal K. Alarfaj, Er Qiang Li, J. F. Hernandez-Sanchez, Sigurdur T. Thoroddsen
SCIENTIFIC REPORTS
(2017)
Article
Physics, Fluids & Plasmas
Dhirendra Tiwari, Lionel Mercury, Marcel Dijkstra, Himanshu Chaudhary, Jose Federico Hernandez-Sanchez
PHYSICAL REVIEW FLUIDS
(2018)
Article
Nanoscience & Nanotechnology
Arturo Susarrey-Arce, Jose Federico Hernandez-Sanchez, Marco Marcello, Yuri Diaz-Fernandez, Alina Oknianska, Ioritz Sorzabal-Bellido, Roald Tiggelaar, Detlef Lohse, Han Gardeniers, Jacco Snoeijer, Alvaro Marin, Rasmita Raval
ACS APPLIED BIO MATERIALS
(2018)