Article
Engineering, Chemical
Hongyu Chen, Milind A. Jog, Douglas E. Evans, Leonid A. Turkevich
Summary: Dustiness evaluation is crucial in estimating potential exposure to toxic, hazardous, or irritant powders. The Rotating Drum is a widely used instrument for assessing powder dustiness, but its aerodynamics during operation is not fully understood. Utilizing computational fluid dynamics to study the flow inside the Rotating Drum can aid in interpreting dustiness measurements and guiding manufacturing processes to generate less dust.
Article
Chemistry, Physical
Aleksander A. Chernyshev, Anna B. Darintseva, Tatiana N. Ostanina, Irina A. Panashchenko, Alena A. Orlova, Alexey E. Novikov, Artem S. Artamonov
Summary: The study presents the results of investigating the process of electrodeposition of metals on a rotating electrode using numerical experiments. The dynamics of nucleus growth were calculated according to a developed model under different conditions of galvanostatic electrolysis, establishing dependencies on changes in nucleus radius, overvoltage, and equilibrium concentration of adatoms. The research conducted in three different electrolytes contributes to the understanding of kinetic parameters of metal reduction and specific electrical conductivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nuclear Science & Technology
J. Matthew Barnett, Kobe R. Schrank, Mary Bliss, Scott K. Cooley
Summary: The study suggests that HEPA filters can operate safely and efficiently well past the 10-year lifetime established by DOE, with a potential operating lifetime of up to 20 years. The results provide a reasonable assurance for extending the service life for HEPA filters beyond 10 years when implemented with well-defined performance and operational requirements.
PROGRESS IN NUCLEAR ENERGY
(2021)
Article
Engineering, Multidisciplinary
A. Neveu, F. Francqui, G. Lumay
Summary: The article introduces the method and results of using the rotating drum geometry to analyze the flow of powders and granular materials, emphasizing the impact of measurement speed on the results, and showing time-dependent and shear-dependent properties.
Article
Engineering, Chemical
Ran Li, Wenzheng Xiu, Baolin Liu, Gang Zheng, Hui Yang
Summary: Research on the flow of rice particles has shown that it differs from classical spherical particles, often exhibiting multiple velocity peaks. Lowering the rotation speed of the drum can change the flow into an avalanche mode, where particles slide and cover the entire rice particle bed.
Article
Nuclear Science & Technology
Hee Kwon Ku, Hyunjin Boo, Geun-Dong Song, Deokhee Lee, Kaphyun Yoo, Byung Gi Park
Summary: The thermal cutting of contaminated or activated metals during decommissioning nuclear power plants releases radioactive aerosols. Air conditioning units with a HEPA filter are used to remove radioactive aerosols, but the efficiency and lifetime of the filters need to be evaluated. This study measures the number concentration and size distribution of aerosols to determine the performance guidance and replacement frequency of HEPA filters used in nuclear power plants.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Vicente Salinas, Cristobal Quininao, Sebastian Gonzalez, Gustavo Castillo
Summary: This study investigates the role of small-scale perturbations in the onset of avalanches in a rotating drum in the stick-slip regime. It shows that the order parameter describing the system is kinetic energy and that the onset of avalanche is determined by oscillation amplitude for high frequencies. A theoretical model is presented to explain the transition between continuous and discrete avalanche regimes as a supercritical Hopf bifurcation.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Chemical
Xuan Liu, Xin Zhang, Sumei Liu, Junjie Liu, Qingyan Chen
Summary: This study developed an empirical equation and design procedures for optimizing the design of multi-V HEPA cabin filters, which resulted in improved filtration efficiency. The empirical equation is easier to use and requires less calculation time compared to CFD simulations.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Thermodynamics
Shengan Deng, Zhi Wen, Fuyong Su, Zhaoyu Wang, Guofeng Lou, Xunliang Liu, Ruifeng Dou
Summary: The research explored a new rotating-drum drying technology for converter sludge, which showed advantages of low cost, high efficiency, and thorough drying. Adjusting operating parameters can accelerate the drying process, and the Weibull model can better predict the drying process.
APPLIED THERMAL ENGINEERING
(2021)
Article
Engineering, Chemical
Ren Han, Jingyu Feng, Yufeng Zhang, Hui Yang, Vladimir Zivkovic, Ran Li
Summary: A numerical simulation was used to investigate the avalanche flow characteristic of particles in the slumping regime within a rotating drum. Results show that the growth rate of avalanching particle number follows a specific pattern over time, with the distribution and propagation velocities of particles exhibiting certain regularities.
Article
Engineering, Chemical
Siyuan He, Yuelei Wang, Zongyan Zhou, Jieqing Gan, Aibing Yu, David Pinson
Summary: Granular materials of different sizes and shapes tend to segregate in the axial direction in a rotating drum. Previous studies have mainly focused on spherical particles, while the segregation of non-spherical particles has received limited attention. In this study, we found that ellipsoidal particles with aspect ratio varying from 0.5 to 2.0 can form bands. The results demonstrate that ellipsoids have lower flowability, which reduces the tendency of band formation. Additionally, small particles in the bands come from different regions depending on the particle shape, and the radial size-induced segregation pattern develops quickly.
Article
Engineering, Chemical
Sunil Kumar, Salma Khatoon, Praveen Dubey, Jeetram Yogi, Anshu Anand
Summary: This study investigates the influence of particle shape on the segregation behavior of binary mixtures in a rotating drum. The results show that coarse particles with lower packing density exhibit higher segregation, while fine particles with pronounced elongation facilitate mixing.
Article
Engineering, Chemical
A. N. Huang, X. Wang, W. Y. Hsu, H. P. Kuo
Summary: By studying the effects of the position and size of inner segmentation rings on axial and radial segregation patterns in a rotating drum, it was found that the rings located outside the shear zone independently affect local mixing. The drum mixing index monotonically increases with ring width, and a specific ring width can cause a long-term segregation pattern change.
Article
Engineering, Multidisciplinary
Shi-tao Cheng, Hao-xiang He, Yi-fei Chen
Summary: This paper proposes a structural damage assessment method based on the generalized elastic-plastic energy dissipation ratio (GEPEDR), and presents assessment methods for overall damage and interlayer damage of seismic-damaged structures. The method is verified through nonlinear finite element analysis of reinforced concrete (RC) frame structures and shaking table tests of a 12-story RC frame structure, showing that it can achieve damage assessment based on seismic signals and structural responses only.
Article
Thermodynamics
Jonas Tombrink, Henning Jockenhoefer, Dan Bauer
Summary: The use of latent heat thermal energy storages allows for efficient storage of thermal energy, while the rotating drum heat exchanger overcomes thermal resistance issues, ensuring stable thermal power and state over time. Experimental results demonstrate the potential of the rotating drum heat exchanger for steam generation from high temperature PCM.
APPLIED THERMAL ENGINEERING
(2021)
Article
Environmental Sciences
Alexander C. O. Jensen, Marcus Levin, Antti J. Koivisto, Kirsten I. Kling, Anne T. Saber, Ismo K. Koponen
AEROSOL AND AIR QUALITY RESEARCH
(2015)
Article
Engineering, Chemical
M. Levin, A. Gudmundsson, J. H. Pagels, M. Fierz, K. Molhave, J. Londahl, K. A. Jensen, I. K. Koponen
AEROSOL SCIENCE AND TECHNOLOGY
(2015)
Article
Chemistry, Multidisciplinary
Marcus Levin, Elena Rojas, Esa Vanhala, Minnamari Vippola, Biase Liguori, Kirsten I. Kling, Ismo K. Koponen, Kristian Molhave, Timo Tuomi, Danijela Gregurec, Sergio Moya, Keld A. Jensen
JOURNAL OF NANOPARTICLE RESEARCH
(2015)
Review
Medicine, Research & Experimental
Jorid B. Sorli, Jitka S. Hansen, Asger W. Norgaard, Marcus Levin, Soren T. Larsen
ALTEX-ALTERNATIVES TO ANIMAL EXPERIMENTATION
(2015)
Article
Chemistry, Analytical
A. J. Koivisto, A. C. O. Jensen, M. Levin, K. I. Kling, M. Dal Maso, S. H. Nielsen, K. A. Jensen, I. K. Koponen
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2015)
Article
Environmental Sciences
Marcus Levin, Olivier Witschger, Sebastien Bau, Elzbieta Jankowska, Ismo K. Koponen, Antti J. Koivisto, Per A. Clausen, Alexander Jensen, Kristian Molhave, Christof Asbach, Keld A. Jensen
AEROSOL AND AIR QUALITY RESEARCH
(2016)
Article
Biochemistry & Molecular Biology
Jorid B. Sorli, Emilie Da Silva, Per Backman, Marcus Levin, Birthe L. Thomsen, Ismo K. Koponen, Soren T. Larsen
AMERICAN JOURNAL OF RESPIRATORY CELL AND MOLECULAR BIOLOGY
(2016)
Article
Toxicology
P. Duch, A. W. Norgaard, J. S. Hansen, J. B. Sorli, P. Jacobsen, F. Lynggard, M. Levin, G. D. Nielsen, P. Wolkoff, N. E. Ebbehoj, S. T. Larsen
CLINICAL TOXICOLOGY
(2014)
Article
Environmental Sciences
Sabina Halappanavar, Anne Thoustrup Saber, Nathalie Decan, Keld Alstrup Jensen, Dongmei Wu, Nicklas Raun Jacobsen, Charles Guo, Jacob Rogowski, Ismo K. Koponen, Marcus Levin, Anne Mette Madsen, Rambabu Atluri, Valentinas Snitka, Renie K. Birkedal, David Rickerby, Andrew Williams, Hakan Wallin, Carole L. Yauk, Ulla Vogel
ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
(2015)
Article
Toxicology
Asger W. Norgaard, Jitka S. Hansen, Jorid B. Sorli, Marcus Levin, Peder Wolkoff, Gunnar D. Nielsen, Soren T. Larsen
TOXICOLOGICAL SCIENCES
(2014)
Article
Public, Environmental & Occupational Health
Virginia Gomez, Marcus Levin, Anne T. Saber, Silvia Irusta, Miikka Dal Maso, Roberto Hanoi, Jesus Santamaria, Keld A. Jensen, Hakan Wallin, Ismo K. Koponen
ANNALS OF OCCUPATIONAL HYGIENE
(2014)