Article
Physics, Fluids & Plasmas
E. S. Benilov
Summary: This study examines the evaporation of a liquid layer on a substrate without assuming isothermality and considers temperature variations. Qualitative estimates demonstrate that nonisothermality affects the evaporation rate based on the substrate's conditions. If the substrate is thermally insulated, evaporative cooling significantly slows down evaporation to the point that the rate tends to zero with time and cannot be determined solely by measuring external parameters. However, if the substrate is maintained at a fixed temperature, the heat flux from below sustains evaporation at a finite rate, which can be deduced from fluid characteristics, relative humidity, and the layer's depth. The qualitative predictions are quantified using the diffuse-interface model applied to the evaporation of a liquid into its own vapor.
Article
Thermodynamics
Zhaoxuan Tang, Tingfang Yu, Zhaoqing Ke, Bozhen Lai, Yan Gao, Ying Zhang
Summary: This experimental study investigates the thermal effects induced by a two-component droplet of propylene glycol water impinging on a hot substrate. The visualization experiment reveals that this phenomenon is characterized by a shift in the boiling regime of the droplets, which undergo different transformation patterns with changes in surface temperature and propanediol concentration. A temperature-concentration regime map is created based on high-speed camera sequence images, and qualitative analysis is performed on the causes and conditions of the boiling transformation. The time of boiling regime transformation can be determined by analyzing the secondary droplets, and the effects of different boiling regimes and propylene glycol concentrations on the size and velocity distribution of secondary droplets are briefly investigated.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Analytical
Boris A. Boom, Alessandro Bertolini, Eric Hennes, Johannes F. J. van den Brand
Summary: This study presents a novel analysis of gas damping in capacitive MEMS transducers using a simple analytical model combined with Monte-Carlo simulations to estimate gas diffusion time. The results, obtained through freely available software, offer insights into the relationship between gas damping and transducer geometry in molecular flow regime. Experimental verification shows that the analysis matches data from air and helium atmospheres within 15% over a wide pressure range.
Article
Chemistry, Physical
Anuj Kumar Singh, Varsha Banerjee
Summary: Furukawa predicted that the growth of domains in binary fluids is l(t)similar to t(2/3) at late times, driven by fluid inertia. However, this inertial growth regime has been difficult to observe in molecular dynamics simulations. In this study, we performed coarsening studies using the Stockmayer (SM) model, which consists of magnetic dipoles interacting with long-range dipolar interactions and the Lennard-Jones (LJ) potential. Interestingly, we found that the SM fluid exhibits the inertial scaling [l(t)similar to t(2/3)] for an extended time period, without showing the early diffusive regime [l(t)similar to t(1/3)] and the intermediate viscous regime [l(t)similar to t] seen in LJ fluids.
Article
Multidisciplinary Sciences
Valtteri Tikkanen, Bernhard Reischl, Hanna Vehkamaki, Roope Halonen
Summary: This study investigates cluster nucleation in the gas phase and examines the effect of latent heat release on nucleation rates and cluster temperatures. By comparing molecular dynamics simulations with theoretical models, the researchers find that latent heat release only slightly suppresses nucleation rates and resolve contradictions regarding cluster temperatures.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(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
Computer Science, Interdisciplinary Applications
Arun K. Chinnappan, Rakesh Kumar, Vaibhav K. Arghode, Kishore K. Kammara, Deborah A. Levin
Summary: Aerodynamic correlations for an ellipsoidal particle in the free molecular regime were proposed using DSMC method. The correlations were validated through simulations and regression analysis, showing consistency with experimental data and theory for flow over different parameters.
COMPUTERS & FLUIDS
(2021)
Article
Energy & Fuels
Sergey Misyura, Andrey Semenov, Yulia Peschenyuk, Ivan Vozhakov, Vladimir Morozov
Summary: In recent years, miniaturization of electronic devices has led to the need for new cooling systems. The use of a surfactant has been found to increase droplet diameter and evaporation rate. Despite extensive research in this area, there are still unanswered questions regarding the influence of surfactant and wall temperature on evaporation rate.
Article
Chemistry, Analytical
Chuqing Zhou, Jiyoung Shim, Zecong Fang, Conary Meyer, Ting Gong, Matthew Wong, Cheemeng Tan, Tingrui Pan
Summary: We have engineered a new impact-printing-based methodology to generate printed microdroplet arrays for protein network research. This methodology offers reagent-saving, efficient, and flexible ways for studying protein networks in both membrane-unbound and-bound states.
ANALYTICAL CHEMISTRY
(2022)
Article
Thermodynamics
M. X. Li, H. P. Wang, C. H. Zheng, Q. Wang, B. Wei
Summary: The heat transfer and oscillation dynamics of liquid Nb-17.3 at.% Si eutectic alloy at high temperatures were investigated using electrostatic levitation. Different oscillation modes were induced in levitated alloy droplets, and a transition from second to third order oscillation was observed as the droplet size increased. A mathematical model was developed to simulate the nonisothermal oscillation process and was found to be consistent with experimental measurements. The shape evolution dynamics and liquid flow patterns inside the alloy droplet were revealed, clarifying the mutual influence mechanism between heat transfer and droplet oscillation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Optics
Sukla Pal, D. Baillie, P. B. Blakie
Summary: In this paper, a theory for an infinitely long droplet state of a zero-temperature dipolar bosonic gas is developed, and the behavior of the droplet is explored using numerical and variational solutions. The theory provides a quantitative description of large finite droplets produced in experiments.
Article
Metallurgy & Metallurgical Engineering
Renhai Shi
Summary: In this study, the nonisothermal dissolution of intermetallic Mg17Al12 in Mg-Al alloy was investigated using DSC, XRD, SEM, CALPHAD-based dissolution models, and molecular dynamics simulation. The size and volume fraction of Mg17Al12 phase were successfully predicted by the kinetic dissolution model and matched well with experimental results. The screening calculation showed that there is a temperature range for significant dissolution of Mg17Al12 phase, which can be increased by increasing the heating rate. Molecular dynamics simulation revealed that the structural order of Mg17Al12 phase during heating is mainly influenced by Al-contained atomic pairs, suggesting the higher activity of Mg atoms compared to Al atoms. These findings provide valuable information for optimizing thermal processing in the application of metal structural materials.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Geosciences, Multidisciplinary
Kenneth Sinclair, Bastiaan van Diedenhoven, Brian Cairns, Mikhail Alexandrov, Andrew M. Dzambo, Tristan L'Ecuyer
Summary: The study shows that the characteristics of clouds and drizzle are influenced by processes of drizzle formation and droplet size distribution. Observations reveal a bimodal droplet size distribution in drizzling open-cells, with a correlation to the onset of precipitation.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Thermodynamics
Dong Niu, Hongtao Gao, Yuying Yan
Summary: This study investigated dropwise condensation on different nanostructured surfaces using molecular dynamics simulation, revealing the significant influence of surface characteristics on droplet growth and state transition. The results showed three typical droplet state transition modes corresponding to the heat flux, providing insights into the mechanisms of dropwise condensation.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Mingjing Chen, Deqi Chen, Haidong Liu, Hanzhou Liu, Lei Zhong, Jian Deng
Summary: This study explores the distribution and characteristics of droplets during the reflood process using visualization experiments and analysis. The results show a strong correlation between droplet behavior and the reflood process in time, providing important support for the development and evaluation of droplet behavior models suitable for transient reflood processes.
APPLIED THERMAL ENGINEERING
(2024)
Article
Nanoscience & Nanotechnology
Gauri M. Nabar, Kalpesh D. Mahajan, Mark A. Calhoun, Anthony D. Duong, Matthew S. Souva, Jihong Xu, Catherine Czeisler, Vinay K. Puduvalli, Jose Javier Otero, Barbara E. Wyslouzil, Jessica O. Winter
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2018)
Article
Chemistry, Physical
Kehinde E. Ogunronbi, Aliasghar Sepehri, Bin Chen, Barbara E. Wyslouzil
JOURNAL OF CHEMICAL PHYSICS
(2018)
Article
Chemistry, Physical
Andrew J. Amaya, Barbara E. Wyslouzil
JOURNAL OF CHEMICAL PHYSICS
(2018)
Article
Chemistry, Physical
Gauri M. Nabar, Jessica O. Winter, Barbara E. Wyslouzil
Article
Chemistry, Physical
Kehinde E. Ogunronbi, Barbara E. Wyslouzil
JOURNAL OF CHEMICAL PHYSICS
(2019)
Article
Chemistry, Physical
Viraj P. Modak, Barbara E. Wyslouzil, Sherwin J. Singer
JOURNAL OF CHEMICAL PHYSICS
(2020)
Article
Chemistry, Physical
Kil Ho Lee, Megan Ireland, Brandon L. Miller, Barbara E. Wyslouzil, Jessica O. Winter
Summary: This paper investigates whether electrospray via interfacial instability self-assembly method can produce high-quality nanocomposites made of block co-polymers and organic nanoparticles. The findings show that surfactant-free approaches may increase encapsulation efficiency, product uniformity, and simplify downstream product purification processes.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Kayane K. Dingilian, Martina Lippe, Jakub Kubecka, Jan Krohn, Chenxi Li, Roope Halonen, Fatemeh Keshavarz, Bernhard Reischl, Theo Kurten, Hanna Vehkamaki, Ruth Signorell, Barbara E. Wyslouzil
Summary: This research investigates the transition of new particle formation from barrier-controlled to collision-limited process, providing a comprehensive understanding through experimental data and kinetic model.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Tong Sun, Barbara E. Wyslouzil
Summary: This study investigates the vapor-liquid nucleation and freezing of aqueous-alcohol nanodroplets, revealing that the presence of alcohol affects particle formation temperatures and surface partitioning preferences. The freezing process is perturbed less by 1-hexanol and 1-pentanol compared to their branched isomers. Furthermore, the presence of alcohols lowers the freezing temperature relative to pure water, but ice nucleation rates change by less than a factor of 2-3 for all cases studied.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Physical
Tong Sun, Gerald Wilemski, Barbara N. Hale, Barbara E. Wyslouzil
Summary: This study investigates how the formation of subcritical methanol clusters affects binary nucleation in water-methanol mixtures. An extended equilibrium model and Monte Carlo simulations are used, and the model is validated against experimental data.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Tong Sun, Dor Ben-Amotz, Barbara E. Wyslouzil
Summary: The addition of 1-propanol and 1-pentanol affects the freezing behavior of water. Specifically, 1-propanol decreases the ice nucleation temperature at certain concentrations, while 1-pentanol does not significantly affect the onset of freezing.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Roope Halonen, Valtteri Tikkanen, Bernhard Reischl, Kayane K. Dingilian, Barbara E. Wyslouzil, Hanna Vehkamaki
Summary: Large scale molecular dynamics simulations were conducted on the homogeneous nucleation of carbon dioxide in an argon atmosphere at temperatures between 75 and 105 K. The study revealed that nucleating clusters generally exhibit liquid-like characteristics, with only clusters containing over 100 molecules able to transition to a crystalline solid under certain conditions. The formation free energies obtained from the simulations were used to enhance classical nucleation theory and greatly improve the prediction of nucleation rates.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Kayane K. Dingilian, Roope Halonen, Valtteri Tikkanen, Bernhard Reischl, Hanna Vehkamaki, Barbara E. Wyslouzil
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Kil Ho Lee, Guolingzi Yang, Barbara E. Wyslouzil, Jessica O. Winter
ACS APPLIED POLYMER MATERIALS
(2019)
Article
Chemistry, Physical
Yensil Park, Barbara E. Wyslouzil
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
