Article
Nuclear Science & Technology
Sachin Thakre, Alexander Konovalenko, Adrian Ahlin, Pavel Kudinov
Summary: Motivated by fuel-coolant interaction phenomena, this study investigates the effect of natural convection flows during the melt dripping process on the formation of a debris bed at the bottom. Using solid particles to simulate the dripping melt, a particle tracking technique is employed to track their paths and gather additional data. The experimental studies reveal that higher pool depths and natural convection flows can enhance the distribution of debris particles, resulting in a shallow and well-spread debris bed.
ANNALS OF NUCLEAR ENERGY
(2022)
Article
Engineering, Chemical
Yohei Murase, Kozo Takayama, Takeaki Uchimoto, Hiromasa Uchiyama, Kazunori Kadota, Yuichi Tozuka
Summary: Die filling is a critical step in the pharmaceutical tableting process. This study applied sparse modeling to select critical flow properties and predict tablet weight variability.
Article
Geosciences, Multidisciplinary
Yaojun Li, Yongjian Ding, Donghui Shangguan, Fengjing Liu, Qiudong Zhao
Summary: The study reveals that the rate of glacier mass loss has been accelerating globally over the past few decades, with a high level of consistency between the acceleration and temperature suggesting a significant impact of climate warming. Alaska glaciers showed the highest acceleration in mass change, while Central Europe exhibited the highest acceleration during 1961-2016.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Physics, Fluids & Plasmas
Emil Bronstein, Jonathan Zimmerman, Eugen Rabkin, Eilon Faran, Ronen Talmon, Doron Shilo
Summary: Acoustic emission (AE) is a powerful experimental method for studying discrete and impulsive events termed avalanches. A data-driven method is developed in this study to detect small-scale AE events below the conventional threshold by modifying the experimental conditions and considering the entire waveform of each AE event.
Article
Mechanics
Balagopal Manayil Santhosh, Marcello Lappa
Summary: This analysis extends previous work on thermovibrational flow to investigate the existence of solid particle attractors and improve control over particle targeting. The relationship between vibration inclination, multi-directional temperature gradient, and system dimensionality opens up new pathways for attractors. Various new solutions are found using a simple geometry.
Article
Mathematics, Applied
Georgie Crewdson, Matthew Evans, Marcello Lappa
Summary: Building on previous research, this study investigates the attraction of solid particles in fluid flows when the direction of the temperature gradient changes. By altering the temperature distribution along certain walls, new particle accumulation structures are discovered.
Article
Chemistry, Multidisciplinary
Tomoya Egoshi, Naoki Uemura, Tokushi Kizuka
Summary: The motion of molybdenum carbide nanoparticles driven by carbon-decomposition catalytic reactions was observed in various nanomaterials, including multiwall carbon nanotubes and carbon nanocapsules. The nanomotors exhibited different types of motions and resulted in the consumption of the inner atomic wall-layers of the nanomaterials.
Article
Engineering, Chemical
Alan Roberts, Jiahe Shen, Brendan Beh, Bin Chen, Timothy Donohue
Summary: This study investigates the determination of loads on discharge isolating gates in mass-flow bins, especially for coal and iron ore industries. The research combines analytical review with experimental study and focuses on transient load changes caused by time-dependent settling of bulk solids. The research findings provide guidelines for bin gate design.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Chemical
Le Xie, Guangming Zhou, Cunshuai Huo, Jiawei He, Zheng-Hong Luo, Jia Yang
Summary: A data-driven modeling method was used to develop a voidage correlation for liquid-solid fluidized beds, which accurately predicts the voidages. Different parametric spaces were selected, and various high-accuracy voidage correlations based on different dimensionless numbers were discovered. The combination of Re and Ar numbers performed the best, with a mean square error as low as 2.29 x 10(-4). The proposed correlation also showed good performance in predicting the voidage of different particles in fluidized beds, indicating its universality.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Correction
Geosciences, Multidisciplinary
A. Beinlich, T. John, J. C. Vrijmoed, M. Tominaga, T. Magna, Y. Y. Podladchikov
Summary: The paper has been corrected and the correction has been published at the specified link.
Article
Engineering, Chemical
Bin Li, Yujia Liu, Sifan Peng, Nan Gui, Xingtuan Yang, Jiyuan Tu, Shengyao Jiang
Summary: This study investigates the flow patterns in a monolayer pebble bed formed in a two-dimensional silo, revealing the rules of solid flow patterns in a three-dimensional silo. Using a whole-field particle tracking platform, the effects of outlet size, inclination angle, and outlet configurations on the solid flow patterns are analyzed. The findings provide useful insights for predicting free discharge in silos with similar dimensions and configurations.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Physics, Multidisciplinary
Zhi Gang Cheng, John Beamish
Summary: Helium is an ideal substance for studying quantum liquids and solids due to its purity at low temperatures, but even small concentrations of isotopic impurities can have significant effects. A new sensitive technique combining dielectric and pressure measurements has been developed to resolve concentration changes of isotopic impurities in liquid helium. The migration behavior of He-3 impurities in a coexisting He-4 phase at low temperatures has been observed, highlighting a slower process compared to diffusion in the liquid phase.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Thermodynamics
Qinghua Guo, Ying Zhen Li, Haukur Ingason, Zhiguo Yan, Hehua Zhu
Summary: This paper focuses on the flow structures and mass flow rates of smoke flows induced by fires in long transportation tunnels under natural ventilation. The study considers important factors such as heat release rate, tunnel width, and height. The mechanism of the smoke flow movement is explored, and it is found that a critical point exists dependent on the HRR and tunnel geometry. The results show that the critical point moves away from the fire source in wider or higher tunnels and is closer to the fire source for a higher HRR. A correlation is proposed to estimate the location of the critical point. The mass flow rates along the tunnel are calculated using different flow models, which produce satisfactory predictions if the vertical temperature profile is known.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Engineering, Chemical
Jie Tang, Haifeng Lu, Xiaolei Guo, Haifeng Liu
Summary: This study experimentally investigated the discharge characteristics of non-gravity driven powder in horizontal silos, focusing on the half cone angle, aeration position, and additional pressure. The experimental results show that the mass flow rate increases with decreasing half cone angle and aeration at the cylinder significantly improves the mass flow rate. Increasing additional pressure effectively improves the mass flow rate, but there is a limit value called pressure surcharge limit. A proposed index is used to evaluate the overall flow-promoting effect and determine the optimal aeration position.
Article
Engineering, Aerospace
Chao Li, Xiaofei Zhu, Zhe Deng, Jiangang Yang, Chunbo Hu, Jinjia Wei
Summary: In this study on powdered engines, the optimal powder-feeding technique was investigated, with findings showing a high linear tendency between powder mass flow rate and the minimum throttle channel area. The solid-gas mass ratio for stable powder feeding was determined to be approximately in the range of 34.4-54.6 under different throttle channel areas.
