Article
Construction & Building Technology
Tamer Calisir, Hakan O. Yazar, Senol Baskaya
Summary: Panel radiators are widely used for heating rooms, and understanding the airflow above them is crucial for maintaining comfort conditions indoors. Studies on radiators with different convector dimensions showed that airflow above the radiators has a direct impact on indoor environmental quality. By changing convector dimensions, similar flow conditions and comfort levels could be achieved while reducing manufacturing costs.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Wonseok Oh, Ryozo Ooka, Hideki Kikumoto, Mengtao Han
Summary: In this study, the boundary conditions for simulating cough airflow using computational fluid dynamics (CFD) were defined and validated using experimental data. The obtained boundary conditions can be used to investigate the risk of infection and transmission routes of human cough.
BUILDING AND ENVIRONMENT
(2022)
Article
Engineering, Mechanical
Ujjawal Arya, Wyatt Peterson, Farshid Sadeghi, Andreas Meinel, Hannes Grillenberger
Summary: This investigation experimentally and analytically studied the oil flow inside an angular contact ball bearing using Bubble Image Velocimetry (BIV). The study developed a counter-rotating angular contact ball bearing test rig (CRACTR) and observed the oil flow using a high-speed camera. The results from the analytical model matched well with the experimental observations and provided valuable information for cage design.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Energy & Fuels
Sangyoon Kim, Changgu Kim, Byungha Kim, Hyunjun Jang, Incheol Kim, Young-Ho Lee
Summary: Analyzing vortices is essential in pump sump design, but CFD analysis alone is not sufficient. Model tests were conducted in this study to validate a suitable CFD simulation method. The results from the dye test and PIV technology were compared to the CFD results to identify the reference level of vorticity for Type 2 subsurface vortices.
Article
Chemistry, Multidisciplinary
Nikola Cajova Kantova, Alexander Caja, Marek Patsch, Michal Holubcik, Peter Durcansky
Summary: By optimizing the combustion process and flue gas flow, separation baffles can effectively capture particulate matter to prevent its emission. Through CFD and PIV verification, setting 1 proves to be the most effective with a particle capture rate of up to 62.3%.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Chemical
A-E Sommer, H. Rox, P. Shi, K. Eckert, R. Rzehak
Summary: This study conducted solid-liquid two-phase flow experiments in stirred tanks and accumulated a CFD-grade database, including experimental data for single-phase flows. The experimental data covers a range of density ratios, particle diameters, solid volume fractions and impeller rotation speeds.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Aerospace
Fu-qiang Chen, Xiao-dong Ren, Yu-hong Li, Chun-wei Gu
Summary: Total pressure loss and vortex pair are two independent flow phenomena that affect the flow quality at the compressor L-inlet duct (CLID), and they have impacts on compressor efficiency, aerodynamic stability, and surge margin. However, there is no general report on controlling these flow phenomena in the open literature. In this study, a wind tunnel test bench is built to investigate the CLID internal flow using both Particle Image Velocimetry (PIV) and numerical simulation. The effects of various parameters on CLID aerodynamic stability are examined, and an optimized design is achieved through parametric sensitivity analysis and orthogonal design methods.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Construction & Building Technology
Jinkyun Cho, Jinho Kim, Yundeok Kim
Summary: Under the global landscape of the prolonged COVID-19 pandemic, a non-contact mobile screening center (NCMSC) using negative pressure booths has been developed to improve ventilation and enable safe and convenient COVID-19 testing. This study investigates aerosol transmission and ventilation control, proposing installation and operation standards for screening centers.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Chemistry, Analytical
Puhua Tang, Liang Liang, Zhiming Guo, Yu Liu, Guanyu Hu
Summary: Magnetically controlled capsule robots are used for diagnosing and treating the human gastrointestinal tract. This study established magnetic driving and fluid measurement systems for in-pipe capsule robots, and analyzed the influence of different parameters on the performance indicators of the robot.
Article
Biophysics
Zongming Zhu, Suqiang Ji, Liang Liang, Hao Wang, Haoyu Xia, Puhua Tang
Summary: This study investigated the hemodynamic indicators of blood vessels during intervention by an interventional robot. The results showed that the robot intervention increased the blood flow rate, blood pressure, equivalent stress, and deformation of the vessels. The operating mode of the robot during low-speed operation had minimal impact on the hemodynamic indicators. Experimental and numerical results were similar, providing important reference for the hemodynamic study and optimization of mobile interventional devices.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2023)
Article
Multidisciplinary Sciences
Zhuo Fu, Kun Li, Yongjun Pang, Liyong Ma, Zhanying Wang, Bin Jiang
Summary: This article studies the influence of the internal flow channel structure of the nozzle on water jet, and finds that a smaller length-to-diameter ratio and contraction angle can improve the cohesion of the water jet and reduce dynamic pressure, making it more suitable for long-distance, low-pressure water jet operations.
Article
Green & Sustainable Science & Technology
A. H. Samitha Weerakoon, Byung-Ha Kim, Young-Jin Cho, Deepak Divashkar Prasad, M. Rafiuddin Ahmed, Young-Ho Lee
Summary: A novel vertical augmentation channel housing a direct-drive cross-flow turbine with optimized geometry of nozzles on both sides was designed and evaluated for wave energy conversion. The optimized design achieved a maximum output power of 13.2 W and an efficiency of 48.31% under specific wave conditions, with a small space footprint compared to other wave energy converters.
Article
Robotics
Liang Liang, Puhua Tang, Yu Liu, Yan Xu
Summary: A magnetically controlled spiral capsule robot was designed and the fluid field surrounding the robot in a pipe filled with mucus was analyzed using computational fluid dynamics and particle image velocimetry. The results showed a correlation between the operating parameters and the performance of the robot, providing a basis for further optimization.
Review
Chemistry, Physical
Onur Yasar, Emre Ozbek, Selcuk Ekici, Enver Yalcin, Adnan Midilli, T. Hikmet Karakoc
Summary: Fuel cells are a promising system utilized in various sectors, and particle image velocimetry is a practical technique for exploring the flow field inside fuel cells. Research on fuel cells focusing on particle image velocimetry technique has been reviewed, with discussions on system design, performance improvement, and cost benefit efforts affected by flow and design parameters.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Physiology
Hang Yi, Zifeng Yang, Mark Johnson, Luke Bramlage, Bryan Ludwig
Summary: This study developed a validated 3D in silico patient-specific internal carotid artery sidewall aneurysm (ICASA) model using particle image velocimetry (PIV) measurements and computational fluid dynamics (CFD) simulations. The results showed good agreement between the CFD model and the PIV measurements, with slight differences observed in the near-wall regions. The validated model can be used to statistically investigate hemodynamic factors on cerebral aneurysm pathophysiology and provide guidance for evaluating the hemodynamic effects on cerebral aneurysms.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Energy & Fuels
Andreia Silveira Freire Soares, Claudia Miriam Scheid, Monica Regina Costa Marques, Luis Americo Calcada
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Energy & Fuels
Robson R. Rocha, Bruno F. Oechsler, Luiz A. C. Meleiro, Flavia M. Fagundes, Fabio O. Arouca, Joao J. R. Damasceno, Claudia M. Scheid, Luis A. Calcada
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
Iona W. Bettinardi, Andreas Castan, Ricardo A. Medronho, Leda R. Castilho
BIOTECHNOLOGY AND BIOENGINEERING
(2020)
Article
Engineering, Chemical
Andressa Azevedo Guimaraes, Tania Suaiden Klein, Ricardo de Andrade Medronho
Article
Mechanics
Rodrigo Petrone dos Anjos, Ricardo de Andrade Medronho, Tnia Suaiden Klein
Summary: Hydrocyclones are widely used in industry and CFD has been employed to test various turbulence models for their computations. Results have shown that, except for the RSM, all turbulence models returned similar tangential velocity profiles as the standard k-epsilon model, but failed in predicting axial velocity. Assessment of Reynolds stresses indicated the importance of Reynolds shear stress component for predicting tangential velocity accurately. Geometric proportions of hydrocyclones may significantly affect rotational and streamline curvature effects.
JOURNAL OF TURBULENCE
(2021)
Article
Energy & Fuels
Aloisio E. Orlando Jr, Luiz F. Barca, Theodore J. Heindel, Tania S. Klein, Ricardo A. Medronho
Summary: This study evaluates the impact of EOR chemicals on gas holdup, finding that both salt and surfactants increase gas holdup, while the effect of polymers depends on superficial gas velocity.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Wenna Raissa dos Santos Cruz, Fabio Pereira dos Santos, Ricardo de Andrade Medronho
Summary: This study investigates the application of supersonic separator technology for removing carbon dioxide from natural gas, analyzing the impact of parametric uncertainties on shock wave prediction using real gas models. Results show that the shock wave introduces non-linearity in the local standard deviation, with different gas models exhibiting varying levels of sensitivity to input uncertainties.
JOURNAL OF COMPUTATIONAL SCIENCE
(2021)
Article
Engineering, Chemical
Joao Victor Barbosa Alves, Ricardo de Andrade Medronho, Carlos Andre Vaz, Luiz Fernando Lopes Rodrigues Silva, Joao Neuenschwander Escosteguy Carneiro
Summary: This study presents a method to optimize the position of gas detectors in the oil industry, considering restrictions on distance from leak points, ground, and equipment side. The results show that even with restrictions, the optimal solution can still be achieved.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2022)
Article
Engineering, Chemical
Joao Pedro Souza de Oliveira, Joao Victor Barbosa Alves, Joao Neuenschwander Escosteguy Carneiro, Ricardo de Andrade Medronho, Luiz Fernando Lopes Rodrigues Silva
Summary: The present work demonstrates the application of Computational Fluid Dynamics (CFD) and Artificial Neural Network (ANN) algorithm in atmospheric dispersion problems. The combination of CFD and ANN allows for digital twin design and optimization. The local approach reduces the computational cost by treating the network as a transition rule. Several case studies were conducted to validate the effectiveness of the method, including methane cloud displacement, plume formation, and wind influence.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2022)