Article
Mechanics
Kaituo Jiao, Dongxu Han, Jingfa Li, Bo Yu
Summary: This study investigates the settling behavior of circular and polygonal particles in non-Newtonian fluids using a combination of lattice Boltzmann method (LBM) and discrete element method (DEM). A novel method is developed to calculate the solid coverage ratio, and the results are validated. The study finds that the shear-thickening fluid has a longer kissing duration and circular particles settle faster compared to polygonal particles.
Article
Engineering, Chemical
Krzysztof Papuga, Jaroslaw Kaszubkiewicz, Dorota Kawalko
Summary: Enhancing measurement precision by increasing initial suspension concentrations and considering particle interactions is achievable.
Article
Energy & Fuels
Shijian Zhang, Jiaqiang Jing, Min Qin, Wen Zhang, Yuting Shan, Yuanzhao Cheng
Summary: This study investigates the impact of heavy oil viscosity on the natural settlement of sand, establishing two models and validating their reliability and applicability through experiments. The results suggest that considering sand particle morphology does not provide a practical advantage in predicting drag coefficients, and the established settling velocity model exhibits over 90% prediction accuracy.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Marco A. Ferrari, Alan Lugarini, Admilson T. Franco
Summary: The present paper analyzes the settling behavior of multiple spherical particles in a power-law fluid. The results show that for shear-thickening fluids, the particles repel each other and avoid collision, while for shear-thinning fluids, a wake of low viscosity is formed behind the particles, resulting in frequent particle collisions. However, as the solid volume fraction increases, these effects become less noticeable.
Article
Mechanics
Xu Yang, Shaowei Wang, Moli Zhao, Yue Xiao
Summary: This study examines the unsteady oscillatory electroosmotic flow of Maxwell fluid in a microchannel with an isosceles right triangular cross section, using a numerical method due to the difficulty of theoretical solution. The numerical solutions illustrate the impact of certain dimensionless variables on velocity profiles.
Article
Engineering, Environmental
Chun-chen Nie, Shun-xiang Shi, Xian-jun Lyu, Peng Wu, Jun-xiang Wang, Xiang-nan Zhu
Summary: Gravity separation is an effective technology for separating WPCBs particles. This study reveals the dynamic and static mechanisms of particles in the gravity concentration process, as well as the importance of particle size ratio.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Environmental Sciences
Simona Francalanci, Enio Paris, Luca Solari
Summary: The transport processes of plastic particles in freshwater and marine environments are important for predicting the fate of plastic in the environment. By studying the effect of different shapes on settling velocity, a new method was developed to predict the settling velocity of plastic and natural particles across a range of flow regimes. Calibration and validation with experimental data support the application of this method in various hydraulic conditions.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Petroleum
Yanan Ding, Daoyong Yang, Hai Huang, Haiwen Wang
Summary: A novel numerical scheme based on the Eulerian-Lagrangian method has been developed to simulate proppant transport and placement behavior considering non-Newtonian fracturing fluids. The study identified the factors dominating proppant transport and placement, such as the concentration of proppants, the nature of the fluid, and the density and size of proppants.
Article
Energy & Fuels
Robert Moukhametov, Anurag Srivastava, Syeda Akhter, Jerahmeel Bautista, Hicham Ferroudji, Hassan Hadear, Ibrahim Hassan, Mohammad Azizur Rahman
Summary: Settling velocity is a key parameter in drilling technology and hydrocarbon processing to transport cuttings efficiently and avoid non-productive time, with high salinity fluid aiding in better separation of oil and natural gas streams. Studies have focused on rheology and settling velocity measurements for power-law and Bingham fluids, but there is limited research on Herschel-Bulkley fluid with salinity.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Review
Environmental Sciences
Roberto Rosal
Summary: The study introduces a morphological description method for microplastic particles based on lengths of the smallest enclosing orthogonal parallelepiped, with three dimensionless parameters describing particle shape. It also discusses the importance of particle size and the derivation of Stoke's diameter based on 3D morphological descriptors. The study highlights the need for equations specifically developed for plastic particles, especially for fibers, and for the atmospheric compartment.
MARINE POLLUTION BULLETIN
(2021)
Article
Chemistry, Multidisciplinary
Zhifeng Bai, Mingzhong Li
Summary: Hydraulic fracturing is a major stimulation method in oil and gas field development. Calculating the settling velocity of particles in fracturing fluid can help predict the fracture support effect. Experimental research shows that adding fibers to the fracturing fluid can enhance the performance of suspended sand. This study modified the constitutive model of fiber-containing fracturing fluid based on fluid rheology, and developed a prediction model for the terminal settling velocity of particles in this type of fluid. The model showed acceptable accuracy compared to measurements.
Article
Chemistry, Multidisciplinary
Zhifeng Bai, Mingzhong Li
Summary: Hydraulic fracturing is the main method used in oil and gas field development. The settling velocity of particles in the fracturing fluid can be calculated to predict the fracture support effect. Experiments show that adding fibers to the fracturing fluid can improve the performance of suspended sand. This study modified the constitutive model of fiber-containing fracturing fluid based on fluid rheology and analyzed the mechanical behavior to determine the reasons for the slowed settling velocity of particles.
Article
Engineering, Chemical
Lianfu Zhang, Hongjiang Wang, Aixiang Wu, Bern Klein, Jiabin Guo, Xi Zhang
Summary: The relationship between solids zone settling velocity (ZSV) and concentration is crucial in the design and operation of thickeners. This study proposes a novel ZSV function that accurately predicts batch settling phenomena and successfully simulates sedimentation without compression. Additionally, the study discusses sedimentation with compression based on the new ZSV function.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Dong Su, Meng Fan, Wenlong Han, Xiangsheng Chen
Summary: The prediction of terminal velocity for non-spherical particles is crucial for understanding their transport processes. However, existing models lack systematic research on the effects of different shape factors on terminal velocity. This study used super-ellipsoidal particles as test particles and proposed a terminal-velocity model based on measured data. The study revealed multivalued predictions and evaluated the prediction errors based on a single shape factor. The results provide a basis for establishing a general terminal-velocity model that considers the influence of particle shape.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Environmental Sciences
Rekha Panghal, Sudeshna Ghosh
Summary: This study investigated the gravitational settling of a flexible, permeable circular and planktonic particle in a fluid. The results showed that the flexibility and permeability of the particle affect the settling velocity and shape deformation.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2023)
