Article
Mechanics
Tianhong Tu, Shaowen Chen, Yuchen Shi, Weihang Li
Summary: In this study, the flow mechanisms and heat transfer characteristics of a sweeping jet on a confined concave surface were investigated using numerical simulations. The results showed that the sweeping jet exhibited better heat transfer performance compared to the circular jet at higher Reynolds numbers and narrower target spacings. The flow details inside the flow field were effectively correlated with the heat transfer characteristics of the target surface. Furthermore, the topology and three-dimensional vortex structure inside the confined channel were remodeled to provide theoretical support for subsequent applications.
Article
Mechanics
Claudiu Patrascu, Corneliu Balan
Summary: This study focuses on the capillary-wave field generated by a liquid jet impinging on a liquid reservoir. It shows that a slight increase in viscosity leads to rapid suppression of wave-like behavior and proposes a simple dependence on the combined Weber-Deborah number for the dimensionless damping coefficient. The experimental results are in good qualitative agreement with the theoretical predictions.
Article
Biochemical Research Methods
Sebastien Andrieux, Pierre Muller, Manish Kaushal, Nadia Sofia Macias Vera, Robin Bollache, Clement Honorez, Alain Cagna, Wiebke Drenckhan
Summary: Investigations of free-standing liquid films are increasingly popular due to their relevance for fundamental and applied scientific problems. A new generation of devices is needed to reliably manage the constraints imposed by films made from strongly viscoelastic and complex fluids.
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
Engineering, Mechanical
F. V. Barbosa, S. F. C. F. Teixeira, J. C. F. Teixeira
Summary: An in-depth study using PIV technique and heat flux sensors was conducted to understand the flow dynamics and heat transfer in submerged and confined multiple jet impingement. The combination of PIV and heat flux sensors proved to be suitable for characterizing the flow dynamics and heat transfer of this complex process. The results provide valuable insights for several engineering applications that use multiple jet impingement.
EXPERIMENTS IN FLUIDS
(2023)
Article
Engineering, Environmental
Zhong-Bo Sun, Hai -Long Liao, Li-Hua Wang, Lan Jiang, Xin Zhang, Bao-Ju Wang, Guang-Wen Chu, Yong Luo
Summary: The flow and breakage behaviors of two liquid jets impacting on stainless steel wire mesh were studied using high-speed photography. The impacts resulted in the formation of liquid jets and further breakage into daughter droplets. The impinging angle, liquid initial velocity, mesh number, and liquid jet diameter were found to affect the flow and breakage behaviors. For water-n-hexane jets, a liquid sheet was formed and could undergo marginal or internal breakup. This study provides a theoretical basis for mass transfer enhancement and reactor design in liquid-liquid systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Emmanouil Chatzigiannakis, Nick Jaensson, Jan Vermant
Summary: Thin liquid films present a complex interplay of capillarity, hydrodynamics, interfacial transport phenomena, interfacial rheology, and interaction forces. Recent advances in experimental techniques provide further insights into these physical phenomena, showing the potential of utilizing these techniques for studying thin liquid films.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yuxin Jiang, Margaret Minett, Elizabeth Hazen, Wenyun Wang, Carolina Alvarez, Julia Griffin, Nancy Jiang, Wei Chen
Summary: Spin coating is a common method for fabricating polymer thin films, but the relationship between film thickness and spin rate does not fully conform to previous theoretical models. In this study, a more general adsorption-deposition model was proposed, which decomposed the film thickness into two components: adsorbed thickness and spin-deposited thickness. A universal relationship between spin-deposited thickness and spin rate was found, independent of substrate type and polymer concentration.
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
Mechanics
Jelle J. J. Schoppink, Keerthana Mohan, Miguel A. A. Quetzeri-Santiago, Gareth McKinley, David Fernandez Rivas, Andrew K. K. Dickerson
Summary: By selectively coating hydrophobic strips on hydrophilic glass capillaries, the trajectory and characteristics of the microjet can be influenced and controlled.
Article
Mechanics
Ali Mohammadtabar, Hadi Nazaripoor, Adham Riad, Arman Hemmati, Mohtada Sadrzadeh
Summary: This study investigates the pattern formation in shear thinning and shear thickening liquid films induced by thermal effects using linear and nonlinear analyses. The results show that rheological properties influence the timescale and characteristics of the formed features.
Article
Chemistry, Physical
Mohammad Saeed Emami, Masoud Haghshenasfard, Reza Zarghami, Roohollah Sadeghi, Mohsen Nasr Esfahany
Summary: This study experimentally determined the nucleation and growth kinetics of loratadine and simulated the anti-solvent precipitation process to obtain ultrafine loratadine nanoparticles. The effect of supersaturation on nucleation and growth rates was found to be significant. The study also assessed size-dependent particle growth and the effect of turbulence aggregation on simulated particle size distribution. The findings contribute to understanding the formation of loratadine nanoparticles and optimizing their production process.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Nanoscience & Nanotechnology
Anna Lena Oechsle, Tobias Schoener, Lewin Deville, Tianxiao Xiao, Ting Tian, Apostolos Vagias, Sigrid Bernstorff, Peter Mueller-Buschbaum
Summary: The influence of humidity on the resistance properties of post-treated PEDOT:PSS films was investigated. It was found that elevated humidity increased the resistance of reference samples without post-treatment, while the post-treated samples showed a reverse behavior. Morphological changes in the film, such as increased PEDOT domain distances, were observed with in situ GISAXS measurements. This led to a deterioration in interdomain hole transport and a rise in resistance. Additionally, EIS measurements revealed additional contributions of ionic charge carriers in the post-treated PEDOT:PSS films.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Mechanics
Alessandro Bongarzone, Arnaud Bertsch, Philippe Renaud, Francois Gallaire
Summary: The study investigates self-sustained oscillations induced by the interaction of two impinging jets in microfluidic devices, confirming a predominantly two-dimensional physical mechanism. Utilizing global stability analysis and weakly nonlinear theory, the research reveals hysteresis in the system within a certain aspect ratio range. The Kelvin-Helmholtz instability is identified as the main candidate for the observed oscillations in fluidic devices.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Polymer Science
Anna Dmochowska, Jorge Peixinho, Cyrille Sollogoub, Guillaume Miquelard-Garnier
Summary: This study investigates the effect of shear on the bursting of molten ultrathin polymer films embedded in an immiscible matrix. The experiment reveals that shear modifies the circularity of the formed holes and increases their growth speed. A proposed model balances capillary forces and viscous dissipation, while considering shear thinning, and captures the main features of the experimental data. This research provides insights into the instabilities occurring during processing of layered polymeric structures.
Article
Engineering, Electrical & Electronic
Bojia He, Anton A. Darhuber
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2019)
Article
Physics, Applied
Thijs W. G. van der Heijden, Anton A. Darhuber, Paul van der Schoot
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Chemistry, Physical
Bojia He, Anton A. Darhuber
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2019)
Article
Chemistry, Physical
Maciej Chudak, Jesse S. Kwaks, Jacco H. Snoeijer, Anton A. Darhuber
EUROPEAN PHYSICAL JOURNAL E
(2020)
Article
Thermodynamics
Vignesh Murali, Jos C. H. Zeegers, Anton A. Darhuber
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Nanoscience & Nanotechnology
Vaishali Chopra, Maciej Chudak, Rene Hensel, Anton A. Darhuber, Eduard Arzt
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Maciej Chudak, Vaishali Chopra, Rene Hensel, Anton A. Darhuber
Article
Engineering, Chemical
M. A. C. van Gestel, B. He, A. A. Darhuber
CHEMICAL ENGINEERING SCIENCE
(2020)
Article
Thermodynamics
Vignesh Murali, Gianmarco Venditti, Jos C. H. Zeegers, Anton A. Darhuber
Summary: The study investigated the deposition of lines of water onto a thin porous medium using a droplet-on-demand, single-nozzle inkjet system. Both experimental and numerical simulations were employed to analyze the dynamics of moisture distribution and temperature profiling of the substrate. The results indicated that substrate speed and droplet frequency significantly influenced the moisture transport and temperature distribution of the paper.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Gianmarco Venditti, Vignesh Murali, Anton A. Darhuber
Summary: This study investigated the combined imbibition and evaporation of surfactant solutions in thin porous media using experiments and numerical simulations. A theoretical model based on a dual-porosity approach was proposed, and the simulations qualitatively reproduced the experimental data, with monitoring done using optical transmission imaging and infrared thermography.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Gianmarco Venditti, Vignesh Murali, Anton A. Darhuber
Summary: This study examined the chromatographic separation of solvents and dyes on paper substrates, finding that the interaction between dyes and paper constituents impacts inkjet printing results. A comprehensive numerical model was developed to quantify these effects and identify key parameters for optimizing printing quality.
Article
Chemistry, Physical
M. G. Wijburg, S. Wang, A. A. Darhuber
Summary: We studied the imbibition and drying of water/co-solvent mixtures in paper and glass microfiber filters. The experiments revealed the complex interplay between solution imbibition, solvent evaporation, and solvent-mediated pore-fiber transport. The results showed that liquids occupied the micron-scale inter-fiber pores on the paper sheet, while polar liquids like water and co-solvents resided in the nm-scale intra-fiber pores in thermodynamic equilibrium. The timescales for achieving equilibrium depended on the water content, leading to the temporary trapping of co-solvents in a non-equilibrium configuration. The combination of two experimental methods allowed the determination of the overall co-solvent content and estimation of the fractions residing in the pores and fibers of a paper sheet. These findings are important for understanding solution behavior in paper and the dynamics of aqueous inkjet printing inks.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
C. -L. Wong, S. Wang, S. Karimnejad, M. G. Wijburg, H. Mansouri, A. A. Darhuber
Summary: Inkjet printing inks commonly contain low volatility and polar liquids, such as glycerol or poly(ethylene glycols), along with water as the main solvent. The deposition of these liquids on paper leads to swelling and anisotropic deformation of the cellulose fibers. The dynamics of expansion provide insights into the distribution of co-solvents within the fibers, with the timescales of pore-fiber transport depending on the co-solvent concentration.
Article
Chemistry, Physical
Maciej Chudak, Jesse S. Kwaks, Jacco H. Snoeijer, Anton A. Darhuber
Article
Physics, Fluids & Plasmas
S. Zitz, A. Scagliarini, S. Maddu, A. A. Darhuber, J. Harting
