Article
Mechanics
D. Cabut, M. Michard, S. Simoens, L. Mees, V. Todoroff, C. Hermange, Y. Le Chenadec
Summary: Researchers performed local velocity measurements of water flow inside tire grooves of a real car rolling through a water puddle to better understand the hydroplaning phenomenon. They highlighted the presence of bubble columns inside the grooves and proposed a predictive model to support the analysis.
Article
Engineering, Multidisciplinary
Damien Cabut, Marc Michard, Serge Simoens, Violaine Todoroff, Corentin Hermange, Yohan Le-Chenadec
Summary: The study proposes using laser light sheet refraction at the fluid flow-window interface for fluorescent particle image velocimetry (PIV) measurements to overcome optical access limitations. Ray tracing is used to quantify illumination intensity, while a cross-correlation model (CCM) is introduced to analyze image pairs and assess error levels in determining the real flow velocity field. The limitations of this refracted PIV (R-PIV) technique and its comparison with planar PIV (P-PIV) in academic pipe flow scenarios are also discussed.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Xuefang Li, Sebastien Erpicum, Emmanuel Mignot, Pierre Archambeau, Michel Pirotton, Benjamin Dewals
Summary: This paper presents two datasets obtained from laboratory experiments of urban flooding, which are valuable for validating and improving numerical or analytical models of urban flooding and may contribute to flood risk management and flood-resilient urban design.
Article
Engineering, Chemical
Ploypailin Romphophak, Claude Le Men, Arnaud Cockx, Carole Coufort-Saudejaud, Pisut Painmanakul, Alain Line
Summary: In this study, a quasi-two-dimensional jet clarifier was developed to facilitate hydrodynamic analysis of the flocculation zone. PIV data was used to visualize the circulation and shear rate induced by the jet, with the parameter Gt shown to be constant around 30,000 for different jet flow rates. This suggests that the efficiency of such jet clarifier can be predicted.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Engineering, Chemical
Tobias Oesau, Philipp Grohn, Swantje Pietsch-Braune, Sergiy Antonyuk, Stefan Heinrich
Summary: Interparticle contacts play a crucial role in industrial processes, and the coefficient of restitution is commonly used to describe particle collisions. This study developed a new method based on magnetic particle tracking (MPT) to measure the restitution coefficient of magnetic particles, and validated it by comparing with image velocimetry. The results showed a high coincidence between the two methods, and the applicability of the MPT method in studying particle rotation was also demonstrated.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Construction & Building Technology
Mengtao Han, Ryozo Ooka, Hideki Kikumoto, Wonseok Oh, Yunchen Bu, Shuyuan Hu
Summary: The study found significant differences in airflow velocity and spread angles between sneezing and speaking, with sneezing having longer duration and higher velocity, while speaking had a smaller average velocity. The differences in airflow features between genders were minor.
BUILDING AND ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Christopher Masafu, Richard Williams, Martin D. Hurst
Summary: In this study, we demonstrate that river discharge can be estimated by using satellite-derived video imagery and high-resolution topography. We used Large Scale Particle Image Velocimetry (LSPIV) to estimate surface velocity from satellite videos and validated the results with a calibrated 2D hydrodynamic model. Despite some errors, our estimates were within 0.3%-15% of the gauge measurements. This research provides a foundation for improving satellite video LSPIV techniques and has significant implications for water resource management and flood risk assessment.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Carl J. Legleiter, Paul J. Kinzel, Mark Laker, Jeffrey S. Conaway
Summary: Information on velocity fields in rivers is crucial for various applications. This study presents a framework for measuring river velocity using aerial images, which has been successfully tested in two Alaskan rivers.
WATER RESOURCES RESEARCH
(2023)
Article
Nuclear Science & Technology
Yuchen Song, Yunqi Shentu, Yalan Qian, Junlian Yin, Dezhong Wang
Summary: This study examines the turbulent flow characteristics in a Venturi tube, revealing a bimodal distribution trend of turbulent kinetic energy and gradual uniformization of turbulence intensity along the horizontal direction. Both mean velocity and fluctuation velocity are proportional to the Reynolds number, while the distribution trend of mean velocity and velocity fluctuation can be determined by the geometric parameters of the Venturi tube.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Hojung You, Rafael O. O. Tinoco
Summary: Underwater obstacles are known to be hotspots for various particulate matters in streams. This study examines the particle behaviors as they pass through a gap between two obstacles, and identifies the impact of gap length on the particle transport. The results show that the transport of particles is influenced by large-scale flow motions, and understanding these patterns can help in effective sampling and monitoring of organic and inorganic particles in aquatic environments.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Multidisciplinary
Mumtaz Hussain Qureshi, Wei-Hsin Tien, Yi-Jiun Peter Lin
Summary: In this study, the performances of PTV and PIV in relation to particle streak images are systematically evaluated using both synthetic and experimental images.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Barbara Stachurska, Amin Mahdavi-Meymand, Wojciech Sulisz
Summary: The study developed new integrated machine learning methods using the SPBO algorithm to determine wave-induced non-cohesive sediment particle velocities. The techniques successfully predict the sediment particle horizontal velocity using easily measurable data, showing potential for interpreting measurement data and verifying sediment transport models.
Article
Engineering, Civil
Francesco Alongi, Dario Pumo, Carmelo Nasello, Salvatore Nizza, Giuseppe Ciraolo, Leonardo V. Noto
Summary: River flow monitoring has seen rapid development thanks to advancements in non-intrusive optical methods. These methods record and analyze the displacement of floating tracer materials to obtain surface velocity fields. By coupling this data with geometric information, river discharge can be assessed. The accuracy of optical techniques is influenced by various factors, such as environmental conditions and software parameterization. This study proposes an automatic procedure for identifying and extracting the most suitable portion of recorded videos, improving the performance of LS-PIV software. The procedure is implemented using an Artificial Neural Network trained with data collected from different rivers in Sicily, and its effectiveness is evaluated based on error in reproducing surface velocity profiles.
JOURNAL OF HYDROLOGY
(2023)
Article
Thermodynamics
Iacopo Tirelli, Andrea Ianiro, Stefano Discetti
Summary: Particle Image Velocimetry (PIV) estimates velocities through particle image correlations, which leads to a modulation effect. To exploit the scattered data from Particle Tracking Velocimetry (PTV), interpolation on a structured grid is necessary, causing spatial modulation bias. A technique called Ensemble Particle Tracking Velocimetry (EPTV) is introduced to reduce this systematic error by merging different instantaneous realizations and obtaining high-resolution mean flow. The methodology is validated against various datasets with increasing complexity, using PTV and PIV analysis.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2023)
Article
Mechanics
Qichi He, Christopher Willman, Richard Stone, Benjamin A. O. Williams
Summary: This paper presents a method for simultaneous particle image velocimetry (PIV) on parallel planes offset in depth. The method uses image splitting optics with variable optical path lengths to place images from two planes onto different halves of a camera sensor. It achieves a shallow depth of field to ensure that only one plane is in focus on each half of the sensor. The method is designed as an inexpensive means to increase the number of measurement planes in PIV setups and can be combined with existing plane discrimination approaches.
Article
Nuclear Science & Technology
Min Seop Song, Hae Yoon Choi, Jee Hyun Seong, Eung Soo Kim
NUCLEAR ENGINEERING AND DESIGN
(2015)
Article
Nuclear Science & Technology
Min Young Park, Min Seop Song, Eung Soo Kim
ANNALS OF NUCLEAR ENERGY
(2016)
Article
Nuclear Science & Technology
Jae-Ho Jeong, Min-Seop Song, Kwi-Lim Lee
NUCLEAR ENGINEERING AND DESIGN
(2017)
Article
Nuclear Science & Technology
Jae-Ho Jeong, Min-Seop Song, Kwi-Lim Lee
NUCLEAR ENGINEERING AND DESIGN
(2017)
Article
Nuclear Science & Technology
Jae-Ho Jeong, Min-Seop Song, Kwi-Lim Lee
NUCLEAR ENGINEERING AND DESIGN
(2017)
Article
Nuclear Science & Technology
Min Seop Song, Jae Ho Jeong, Eung Soo Kim
NUCLEAR ENGINEERING AND TECHNOLOGY
(2019)
Article
Nuclear Science & Technology
Do Kyun Lim, Min Seop Song, Hoon Chae, Eung Soo Kim
NUCLEAR ENGINEERING AND TECHNOLOGY
(2019)
Article
Engineering, Mechanical
Jee Hyun Seong, Min Seop Song, Daniel Nunez, Annalisa Manera, Eung Soo Kim
EXPERIMENTS IN FLUIDS
(2019)
Article
Nuclear Science & Technology
Minseop Song, Jae-Ho Jeong, Eung Soo Kim
NUCLEAR ENGINEERING AND DESIGN
(2020)
Article
Nuclear Science & Technology
Min Seop Song, Il Woong Park, Eung Soo Kim, Yeon-Gun Lee
Summary: This paper presents a numerical investigation of two-phase natural circulation flows established when external reactor vessel cooling is applied to a severe accident of the APR1400 reactor for the in-vessel retention of the core melt. The study is important for understanding the coolability limit due to external reactor vessel cooling and the behavior of the fluid during the core retention process.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2022)
Article
Nuclear Science & Technology
Jae-Ho Jeong, Min-Seop Song
Summary: A numerical analysis was conducted to investigate the three-dimensional structures of a vortical flow field and heat transfer characteristics in a partially blocked 7-pin fuel assembly mock-up of a sodium-cooled fast reactor. The results showed that vortex structures play a significant role in convective heat transfer enhancement, with control of these structures being crucial for improving heat transfer efficiency.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Nuclear Science & Technology
P. Sabharwall, J. L. Hartvigsen, T. J. Morton, J. Yoo, S. Qin, M. Song, D. P. Guillen, T. Unruh, J. E. Hansel, J. Jackson, J. Gehin, H. Trellue, D. Mascarenas, R. S. Reid, C. M. Petrie
Summary: This work provides a summary of selected experimental capabilities being developed to support nonnuclear testing and demonstration of technology in support of microreactors under the U.S. Department of Energy's (DOE's) Microreactor Program. Major capabilities include the Single Primary Heat Extraction and Removal Emulator (SPHERE) and the Microreactor Agile Non-nuclear Experimental Test Bed (MAGNET).
NUCLEAR TECHNOLOGY
(2023)
Article
Nuclear Science & Technology
Min Seop Song, Jae-Ho Jeong, Eung Soo Kim
ANNALS OF NUCLEAR ENERGY
(2020)
