Article
Engineering, Environmental
Saumitra Mishra, Pushpendra Kumar Vishwakarma, Ankit Sharma, Kirti Bhushan Mishra
Summary: This study reports the characteristics of CS2 pool fires in laboratory scale tests, including Mass Burning Rate, flame length, flame temperature, and concentration of combustion products. The MBR of CS2 pool fires is mainly controlled by conduction and convection, showing different flame colors under different backgrounds, and producing high concentrations of SO2 during combustion. A correlation has been established among pool diameter, burning time, and SO2 concentration, which helps to assess fire risks associated with CS2.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Chemistry, Physical
R. T. van Gaalen, H. M. A. Wijshoff, J. G. M. Kuerten, C. Diddens
Summary: The study investigates the relationship between thermal Marangoni flow and surfactant dynamics using two numerical models. It is found that insoluble surfactants can suppress the thermal Marangoni flow if their concentration is sufficiently large and evaporation and diffusion are slow. Soluble surfactants, on the other hand, can either reduce or increase interfacial velocity depending on their sorption kinetics. The study also shows that a small concentration of insoluble surfactants can significantly decrease the tangential flow velocity at the interface. The numerical models are validated through comparison in cases where both are applicable.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Fuwei Yang, Bai Song
Summary: Twisted bilayer graphene (TBLG) is a versatile platform for studying various transport phenomena. In this study, it is found that thermal flow is suppressed near the magic angle, with greater suppression at lower temperatures and larger gaps. When the chemical potential lies in the energy gap, over 100-fold heat-flow variation can be achieved within a small twist angle. By reducing the electron scattering rate, the radiation spectrum near the magic angle dramatically narrows, leading to over 10,000-fold suppression.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Physical
Gannena K. S. Raghuram, Lalit Bansal, Saptarshi Basu, Aloke Kumar
Summary: This study experimentally investigates the concentration and molecular weight dependence of deposit patterns of polymer droplets on hydrophobic surfaces. The results show a transition from ring to non-ring patterns with increasing concentration, while decreasing the polymer molecular weight does not suppress the coffee ring formation. The findings provide insights for applications like inkjet printing, surface coatings, and biotechnology assays where tuning polymer deposit patterns is important.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Sam Dehaeck, Alexey Y. Rednikov, Hatim Machrafi, Alekos Ioannis Garivalis, Paolo Di Marco, Senthil Kumar Parimalanathan, Pierre Colinet
Summary: This study analyzes a microgravity experiment called ARLES that investigates the evaporation of droplets on a flat substrate into the atmosphere. The experiment focuses on using a liquid called HFE-7100 and considers the possibility of applying an electric field. The study reveals the visualization of vapor cloud and discovers Marangoni jet and electroconvection phenomena.
Article
Thermodynamics
Han Kang, Minghai Li, Guangmei Shi
Summary: This study developed a coupled heat transfer model of bare-bead thermocouples in open pool fires and considered the effect of flame thickness on measurement error. The results showed that a decrease in flame thickness led to an increase in temperature measurement error. A flame thickness limit value, considering the correction of temperature measurement error, was proposed.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2024)
Article
Thermodynamics
G. C. Fraga, P. J. Coelho, F. H. R. Franca
Summary: This study investigates turbulence-radiation interaction using transient data from high-resolution large eddy simulations. Turbulent fluctuations lead to an increase in both mean emission and absorption, particularly in the hot gas plume region. Temperature autocorrelation is identified as the most important correlation in the time-averaged emission term.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Environmental
Jinlong Zhao, Qingyuan Zhang, Zhenhua Wang, Rui Yang, Jianping Zhang
Summary: Accidental fire in chemical parks is a safety concern due to major fire accidents involving storage tanks. Boilover is a destructive tank fire scenario, but its behaviors under reduced pressure in plateau regions are rarely studied. This study conducted thin-layer boilover experiments and found continuous boilover with varying intensity, influenced by initial fuel thickness and pool diameter. The findings provide important insights for risk assessment of continuous boilover in fire accidents.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Kuibin Zhou, Mengya Zhou, Mengyuan Huang, Yifan Wang
Summary: This paper systematically investigates jet fire in a pit (JFP) caused by the explosion of underground pipelines. The study observes different types of flames and develops correlations for flame length and width in various pits, as well as proposes models to predict thermal radiation. The research indicates that flame buoyancy becomes more significant than nozzle exit momentum as the nozzle exit velocity increases, leading to the evolution of JFP behavior.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Kuibin Zhou, Mengya Zhou, Mengyuan Huang, Yifan Wang
Summary: This paper presents a systematic investigation on the jet fire in a pit, including the variations of gas entrainment mode and flame behavior. A dimensionless heat release rate coupling the pit geometrical property is developed to correlate the flame area and length, which is validated by experimental data. Models for predicting the thermal radiation of the jet fire are proposed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Electrical & Electronic
Bo Su, Hao Li, Weiyu Ma, Jing Zhao, Qi Yao, Jing Cui, Chong Yue, Chunli Kang
Summary: Two different methods were used to analyze OLR data before and after earthquakes, showing varying characteristics in terms of temporal and spatial anomalies. The tidal force fluctuant analysis method was able to consistently and clearly display OLR anomalies, closely related to changes in seismic tectonic stress.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2021)
Article
Physics, Multidisciplinary
D. J. Dai, L. B. Fu
Summary: In this letter, the angular distribution of the ionization rate of hydrogen atoms with the effect of a finite number of photons is computed based on field quantization. The ionization rate is found to fluctuate with the initial photon number of the field, showing a peak value higher than predicted by Keldysh-Faisal-Reiss theory. The phenomenon of ionization peak is also observed in coherent state of the field.
Article
Multidisciplinary Sciences
M. Hamm, M. Grott, H. Senshu, J. Knollenberg, J. de Wiljes, V. E. Hamilton, F. Scholten, K. D. Matz, H. Bates, A. Maturilli, Y. Shimaki, N. Sakatani, W. Neumann, T. Okada, F. Preusker, S. Elgner, J. Helbert, E. Kuhrt, T-M Ho, S. Tanaka, R. Jaumann, S. Sugita
Summary: By observing the near-Earth asteroid Ryugu, researchers have found that it underwent strong aqueous alteration prior to dehydration, which is crucial for understanding the connection between asteroids and meteorites.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Alexander A. Fedorets, Eduard E. Kolmakov, Dmitry N. Medvedev, Michael Nosonovsky, Leonid A. Dombrovsky
Summary: Clusters of nearly identical water microdroplets levitating over a locally heated water layer are studied. High-resolution and high-speed fluorescence microscopy reveals a universal brightness profile of single droplets, independent of temperature and size. The explanation lies in the theory of light scattering, leading to a new method for determining optical inhomogeneity of droplets from fluorescent images. An anomalous fluorescence effect in large droplets is observed and explained as the diffusion of fluorescent substance in water. Understanding fluorescence profiles enables the application of droplet clusters in the laboratory study of biochemical processes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Thermodynamics
Raffaela Calabria, Fabio Chiariello, Patrizio Massoli
Summary: Transformations inside emulsion droplets were studied using laser diagnostics. At high temperatures, the diesel oil phase in the droplets gradually depleted while the pyrolysis oil microdroplets underwent evaporation, liquid phase pyrolysis, and polymerization. Optical microscopy confirmed the results obtained from laser diagnostics.
COMBUSTION SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
Fei Tang, Qing He, Jennifer Wen
COMBUSTION AND FLAME
(2019)
Article
Mechanics
Konstantinos G. Lyras, Siaka Dembele, Jennifer X. Wen
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2019)
Article
Chemistry, Physical
Chao Zhang, Jennifer Wen, Xiaobo Shen, Guangli Xiu
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Thermodynamics
Depeng Kong, Rongqi Peng, Ping Ping, Jin Du, Guoming Chen, Jennifer Wen
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Physics, Fluids & Plasmas
Wenhu Han, Wenjin Ma, Chengeng Qian, Jennifer Wen, Cheng Wang
PHYSICAL REVIEW FLUIDS
(2019)
Article
Thermodynamics
Kazui Fukumoto, Jennifer X. Wen, Manhou Li, Yanming Ding, Changjian Wang
COMBUSTION AND FLAME
(2020)
Article
Engineering, Chemical
Reza Khodadadi Azadboni, Ali Heidari, Jennifer X. Wen
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2020)
Article
Engineering, Civil
Fei Tang, Peng Hu, Jennifer Wen
Summary: The lateral ceiling temperature distribution induced by wall-attached fires with various burner aspect ratios in underground spaces was experimentally investigated. Different aspect ratios of rectangular gas burners were found to result in varying lateral ceiling temperature distributions, with an increase in burner aspect ratio leading to higher temperatures at specific locations below the ceiling.
FIRE SAFETY JOURNAL
(2021)
Article
Energy & Fuels
Chao Zhang, Xiaobo Shen, Jennifer X. Wen, Guangli Xiu
Article
Thermodynamics
Leonid A. Dombrovsky, Vladimir Yu Levashov, Alexei P. Kryukov, Siaka Dembele, Jennifer X. Wen
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2020)
Article
Nanoscience & Nanotechnology
Zhaoxin Ren, Jennifer X. Wen
Article
Nuclear Science & Technology
Okorie Ukairo, Siaka Dembele, Ali Heidari, Hugues Pretrel, Jennifer Wen
Summary: This study focuses on predicting fire behavior in a mechanically ventilated nuclear compartment using the open-source computational fluid dynamics (CFD) fire simulation code FireFOAM. The modified FireFOAM with an added Conjugate Heat Transfer (CHT) model is validated to accurately predict pressure variations and flow rates in the nuclear compartment. The study demonstrates that the mechanical ventilation model and modified FireFOAM with CHT can effectively predict fire behavior in nuclear facilities.
NUCLEAR ENGINEERING AND DESIGN
(2021)
Review
Energy & Fuels
Jac Clarke, Wulf Dettmer, Jennifer Wen, Zhaoxin Ren
Summary: Industries worldwide are transitioning to net-zero carbon emissions in response to government policies and strategies addressing climate change. Hydrogen is being increasingly explored as an energy source, particularly in aviation where a renewable alternative to traditional hydrocarbon fuels is crucial. Different storage methods for hydrogen are considered, along with the importance of infrastructure and safety in large-scale conversion. This paper reviews previous research on characterizing unignited and ignited hydrogen jets, focusing on near-field flow structure, dispersion, ignition, flame characteristics, and safety considerations.
Article
Electrochemistry
Haodong Chen, Jonathan E. H. Buston, Jason Gill, Daniel Howard, Rhiannon C. E. Williams, Elliott Read, Ahmed Abaza, Brian Cooper, Jennifer X. Wen
Summary: This study developed a simplified mathematical model for predicting the evolution of heating-induced thermal runaway of lithium-ion batteries. The model was verified through experimental tests and found to accurately predict the critical ambient temperature that triggers battery thermal runaway to be between 127 and 128 degrees Celsius.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Instruments & Instrumentation
Zengrun Wen, Xiulin Fan, Kaile Wang, Weiming Wang, Song Gao, Wenjing Hao, Yuanmei Gao, Yangjian Cai, Liren Zheng
Summary: This study presents a transition from Q-switched state to continuous wave state in an erbium-doped fiber laser, accompanied by irregular mode-hopping. The results showed that the transition between these two states can be achieved by adjusting the pump power. Modulation peaks were observed on both the Q-switched pulse train and the continuous wave background, and the central wavelength fluctuated.
INFRARED PHYSICS & TECHNOLOGY
(2024)
