Article
Engineering, Chemical
Sina Hassanzadeh Saraei, Bernhard Peters
Summary: Although CFD-DEM simulations can accurately predict long-range hydrodynamic interaction, they face challenges in capturing lubrication effects due to insufficient mesh resolution for close distance particle interactions. To address this, we used a variant of Immersed Boundary method in our CFD solver for fully resolved simulations. We also developed a second-order boundary layer reconstruction approach to improve accuracy. Additionally, we investigated the treatment of shared cells between particles and the impact of mesh resolution and time step size on force calculation accuracy, finding a specific ratio range for correct short-range hydrodynamic interaction capture.
Article
Computer Science, Interdisciplinary Applications
Dong-Mei Zhang, Lei Han, Zhong-Kai Huang
Summary: This study presents a multi-phase coupled method based on computational fluid dynamics, discrete element method, and computational structural dynamics for simulating fluid, particle, and structure interactions. The proposed method is validated through laboratory experiments and numerical simulations.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Pharmacology & Pharmacy
Satyajeet Bhonsale, Lewis Scott, Mojtaba Ghadiri, Jan Van Impe
Summary: The study reveals that particles in spiral jet mills significantly decelerate the fluid. Particle velocity is influenced by both particle loading and operating pressure, with slower movement at low pressures and high loadings. Particle-particle collisions outnumber particle-wall collisions.
Article
Engineering, Civil
Chuang Zhou, Jian-Gu Qian, Zhen -Yu Yin, Hao Xiong
Summary: This study investigates the effect of cyclic loading on suffusion in gap-graded soils using computational fluid dynamics and discrete element method. The results show that higher cyclic frequency and strain magnitude lead to more severe loss of fines.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Yajing Liu, Lizhong Wang, Zhen-Yu Yin, Yi Hong
Summary: Through simulations, it was found that filling the voids with fine particles can decrease soil erodibility at the opening, while over-filling the voids can increase soil erodibility. Micromechanical analyses showed that filling the voids helps stabilize the soil arch at the opening.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
Chuang Zhou, Jian-Gu Qian, Zhen-Yu Yin, Ya-Jing Liu, Zi-Bo Du
Summary: In this study, the migration of fine particles within a coarse grain matrix under different soil anisotropy conditions was investigated using the coupled CFD-DEM simulations. Macroscopic and microscopic results showed that the greater the bedding angle, the more severe the loss of fines and the more significant the soil deformation. Different migration characteristics were identified based on the degree of soil anisotropy. It was also found that the aspect ratio of particles was beneficial for erosion resistance and soil strength.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Yu Peng, Zhen-Yu Yin, Chuang Zhou, Xuanming Ding
Summary: This study investigates the effect of capillary suction on the bearing capacity of unsaturated fine granular soil. The results show that capillary suction improves the bearing capacity and allows for greater settlement in fine granular soil. The study also reveals deeper particle migration and a larger distribution of contact force in unsaturated soils compared to saturated soils.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Thermodynamics
Genevieve Soon, Hui Zhang, Chun Yang, Adrian Wing-Keung Law
Summary: The CD-MELT method is developed for modeling the isothermal melting of a packed bed under forced convection, allowing a high degree of representation of the melting process. It introduces a mass loss fraction for accounting for phase changes, different from other existing models. Despite using a coarse mesh, the predictions are found to be satisfactory when compared with experimental results.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Chemical
Zeyu Li, Zhenbo Tong, Hao Zhang, Kaiwei Chu, Renjie Li, Hao Miao, Jiansong Zhao, Aibing Yu
Summary: With the increasing energy demand and environmental pollution, the utilization of hydrogen energy is gaining attention due to its high calorific value and environmentally friendly combustion products. This study investigates the behavior of solid particles in a cyclone under the extreme conditions of supercritical water (SCW) by using a combined discrete element method (DEM) and computational fluid dynamics (CFD) model. The results show that particles significantly impact the flow fields and the interaction forces between particle and wall are smaller than particle-particle interactions. The findings contribute to the understanding of SCW-cyclone mechanism and can be helpful for optimizing cyclone performance.
Article
Biotechnology & Applied Microbiology
Yuqing Xia, Pahala G. Jayathilake, Bowen Li, Paolo Zuliani, Jinju Chen
Summary: This study utilized a computational fluid dynamics-discrete element method model to investigate the oscillation and cohesive failure of biofilm streamers, as well as the effects of streamer length and spatial arrangement on their behavior. The findings contribute to a better understanding and control of biofilm motion in fluid flow.
BIOTECHNOLOGY AND BIOENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
E. G. Karvelas, N. K. Lampropoulos, L. T. Benos, T. Karakasidis, I. E. Sarris
Summary: This study investigates the aggregation of paramagnetic nanoparticles in vivo using numerical simulations, revealing key relationships between aggregation length, time, particle diameter, concentration, and magnetic field magnitude. Results show that increasing the magnetic field strength and particle diameter promote aggregation, while higher concentrations inhibit the number of isolated particles.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2021)
Article
Engineering, Chemical
Xianfeng Wang, Wenji Li, Jun Ren, Qiling Luo, Yuan Fang, Feng Xing
Summary: The study proposed a speed-up method with reduced Young's modulus to analyze the maximum contact force between particles, which was verified to be effective through experiments.
Article
Computer Science, Interdisciplinary Applications
Yingtang Di, Lanhao Zhao, Jia Mao
Summary: A resolved CFD-DEM method is developed to accurately simulate dense fluid-particle flows by combining computational fluid dynamics and discrete element method with the immersed boundary method. This method allows for a fully resolved representation of the fluid phase around the particle phase, reflecting the true influence of the wake flow on particles in dense particulate flows.
COMPUTERS & FLUIDS
(2021)
Article
Engineering, Marine
Sung-Je Lee, Jang Hyun Lee
Summary: This study discusses the wear of marine vessels' hull plate caused by collisions with ice on the Arctic Sea route. A multi-phase approach is used to account for the behavior of ice particles affected by fluid force, and computational fluid dynamics and the discrete element method are employed to evaluate the motion of ice floes. The simulation results present the shape change of the hull surface due to wear, and the numerical procedures for predicting abrasive wear are discussed.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Pharmacology & Pharmacy
Xiaoyu Liu, Mostafa Sulaiman, Jari Kolehmainen, Ali Ozel, Sankaran Sundaresan
Summary: This study evaluated the effectiveness of two coarse-grained CFD-DEM approaches in drug delivery via dry powder inhalers, finding that the representative particle approach can approximate CFD-DEM results with reasonable accuracies.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2021)
Article
Engineering, Chemical
Jieqing Gan, Zongyan Zhou, Aibing Yu, Dean Ellis, Reece Attwood, Wei Chen
Summary: Multibody dynamics (MBD) simulation is a useful tool for analyzing the kinematic function of multibody systems, while discrete element method (DEM) is commonly used for simulating particle flows and overall processes. Combining MBD and DEM methods through functional mock-up interface (FMI) co-simulation can predict equipment performance by considering both material and equipment behavior. This study utilized Dymola software to perform MBD and FMI co-simulations, developing MBD models for a hydraulic excavator system and GPU-based DEM models for excavator digging cycles. The results demonstrated the significant impact of solid materials on excavator movement.
Article
Engineering, Chemical
Lingling Liu, Shibo Kuang, Baoyu Guo, Aibing Yu
Summary: Optimization of ironmaking blast furnaces involves considering bottom and top operations. A recently developed integrated BF model and numerical orthogonal experiments are used to predict BF performance indicators and conduct multi-objective optimization and operatable zone identification.
CHEMIE INGENIEUR TECHNIK
(2023)
Article
Engineering, Chemical
E. Dianyu, Haihan Fan, Zhongfang Su, Guangtai Xu, Ruiping Zou, Aibing Yu, Shibo Kuang
Summary: This paper proposes a hydrocyclone with a tapered inlet design to reduce the influence of particles misplacement. The new hydrocyclone integrates the advantages of both spiral inlet and tangential inlet. Through the analysis of separation performance, flow characteristics, and volume fraction distributions, an optimum design is identified. Compared to a standard hydrocyclone, the new design significantly improves tangential velocities, expands the locus of zero vertical velocity, and achieves more stable air core, symmetric radial and axial velocity distributions, as well as reduced eddy flow and short-circuit flow. This study offers a new perspective for improving hydrocyclone flows and performance.
Article
Engineering, Chemical
Yifan Qin, Xiao Dong Chen, Aibing Yu, Jie Xiao
Summary: Mathematical modeling of mass transfer and absorption in the small intestine is challenging and requires a reliable and computationally efficient predictive model. This study derives an absorption model that considers the 3D intestinal inner wall structure and can be used in a 1D distributed model. Computational fluid dynamics simulations are used to quantify the mass-transfer coefficient. The model provides insights into the influence of intestinal morphology and motility on mass transfer and absorption.
Article
Energy & Fuels
E. Dianyu, Peng Zhou, Langyong Ji, Jiaxin Cui, Qiang Xu, Liejin Guo, Aibing Yu
Summary: In this study, a validated CFD-DEM model is used to investigate the dynamics, microstructure, and thermochemical behaviors in the raceway of a blast furnace with hydrogen injection operations. The effects of hydrogen injection concentration on raceway size, gas temperature, and components are studied.
Article
Pharmacology & Pharmacy
Hao Miao, Ke Huang, Yingwen Li, Renjie Li, Xudong Zhou, Jingyu Shi, Zhenbo Tong, Zhenhua Sun, Aibing Yu
Summary: In this study, the LNP formulation, atomization methods, and buffer system were optimized to maintain stability and efficiency of mRNA encapsulated LNPs during the atomization process. A suitable LNP formulation for atomization, AX4, DSPC, cholesterol, and DMG-PEG2K at a 35/16/46.5/2.5 (%) molar ratio, was identified based on in vitro experiments. Soft mist inhaler (SMI) was found to be the most suitable method for pulmonary delivery of mRNA encapsulated LNPs. The physico-chemical properties of the LNPs, such as size and entrapment efficiency, were further improved by adjusting the buffer system with trehalose. In vivo fluorescence imaging of mice demonstrated the potential of SMI with proper LNPs design and buffer system for inhaled mRNA-LNP therapies.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Engineering, Chemical
Li Ji, Puja Paul, Bhuvana K. Shanbhag, Ian Dixon, Shibo Kuang, Lizhong He
Summary: This review summarizes the emerging applications of hydrocyclones in food and bioproduct processing. While hydrocyclones are efficient in removing larger particles such as mammalian cells, separating small cells like yeast is more challenging. Strategies such as decreasing body diameters and increasing inlet velocities have been explored to tackle this challenge at the cost of increasing the water split at underflow and reducing the concentration ratio.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Long Huang, Runyu Liu, Fayuan Huang, Jiale Yuan, Deyang Wen, Qingxia Liu, Yuemin Zhao, Haishen Jiang, Shibo Kuang
Summary: In this study, the performance of a new perturbed rotary centrifugal airflow classifier was investigated through experiments and numerical simulations. The results show that abnormal pressure distribution in the internal flow field deteriorates the classification effect of different tooth structures. The highest classification efficiency was achieved by the single-row tooth structure under certain operating parameters.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Fayuan Huang, Shibo Kuang, Ruiping Zou, Bodhisattwa Chaudhuri, Aibing Yu
Summary: This paper presents a numerical study of tribocharging during pneumatic conveying and validates the model using specific charge measurements. It quantifies the cumulative charge and its effect on horizontal pneumatic conveying. The study establishes a phase diagram to predict charging modes and analyzes flow characteristics to understand charging phenomena.
Article
Metallurgy & Metallurgical Engineering
Xinyang Zhang, Lulu Jiao, Junjie Li, Shibo Kuang, Aibing Yu
Summary: This study presents a numerical investigation on the effect of belly diameter to effective height ratio (RD-H) on the performance of ironmaking blast furnace (BF). The results recommend an optimal RD-H range for BF designers, which ensures low coke rate, low gas pressure drop, high productivity, and high thermal energy utilization.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Energy & Fuels
Adriano Gomes de Freitas, Ricardo Borges dos Santos, Luis Alberto Martinez Riascos, Jose Eduardo Munive-Hernandez, Shibo Kuang, Ruiping Zou, Aibing Yu
Summary: Pneumatic conveying of powders is an engineering process that is used to transport dry granular or powder materials. This process consumes a significant amount of energy and contributes to greenhouse gas emissions. The goal of this research project is to develop a model for pneumatic conveying and analyze the bulk characteristics of the particles being transported. Due to the empirical nature of pneumatic conveyance, it is difficult to establish general models. Therefore, evaluating energy efficiency is usually limited to specific experimental conditions. The research focuses on the optimization of a workflow using data from an industrial operation controlled by a Programmable Logic Controller (PLC). By applying mathematical methods, it has been shown that it is feasible to control an efficient pneumatic conveying system by manipulating only two input parameters.
Article
Engineering, Environmental
Jinyi Tian, Yuqing Gao, Xiaoyun Ye, Fei Huang, Yuwei Zhao, Tong Zhang, Wei Zhao, Xiurong Chen, Hualin Wang, Shibo Kuang
Summary: A gravity-driven hydrocyclone was proposed for the separation and activation of granular sludge without the need for an intake pump. CFD simulations showed that the inclination angle affected fluid flow, particle motion, and separation performance, but had little influence on particle rotation and translation. The new hydrocyclone achieved efficient separation and the split ratio increased with the inclination angle.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Mohammad Fazli, Murray Rudman, Shibo Kuang, Andrew Chryss
Summary: This paper describes the numerical methodology of several versions of immersed boundary methods (such as Volume Penalization IBM, Indirect Imposition of Discrete Forcing IBM, and Direct Imposition of Discrete Forcing IBM) and their applications in Newtonian and yield-pseudoplastic flows. The investigation shows that explicit forcing methods are incompatible with flows with non-Newtonian yield-pseudoplastic rheology, while the implicit forcing method is reliable for modeling non-Newtonian flows.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Chemical
Haoyu Wang, Zhen Tan, Shibo Kuang, Aibing Yu
Summary: This study investigates the effects of operation strategies on the process characteristics of centrifugal slurry pump using the DDPM method. The results show that slurry flowrate and particle size have significant impacts on pump erosion, while impeller speed affects the severity of erosion.
Article
Chemistry, Physical
Ji Tao, Liang Xu, Can Li, Shixian Xiong, Zhiqiang Xu, Jingyao Shao, Lei Cao, Ying Zhang, Kejun Dong, Ling-Ling Wang
Summary: In this study, the photocatalytic properties of AlN/TMO heterojunctions formed by coupling MoO2 and WO2 with AlN were investigated using first-principles calculations. The results showed that the AlN/MoO2 and AlN/WO2 heterojunctions have efficient electron-hole separation abilities and the AlN/MoO2 heterojunction exhibited excellent carrier mobilities. Additionally, the AlN/WO2 heterojunction showed promising hydrogen evolution reaction (HER) performance, suggesting its potential as a new candidate for photocatalytic water splitting.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Engineering, Chemical
Benjamin De Castro, Mostafa Benzaazoua, Soumali Roychowdhury, Aurelie Chopard, Francis Quintal Lauzon, Benoit Plante
Summary: This study proposes an innovative method using deep learning algorithm and reflected light optical imaging to automatically detect all particles and minerals in acrylic resin polished sections. The experimental results show that this method can accurately detect all mineral particles, including transparent minerals, under reflected light optical microscopy, and provide unbiased mineralogical quantification.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Qiushi Song, Xinyu Du, Changlu Shan, Hongwei Xie, Zhiqiang Ning, Kai Yu
Summary: This study investigated the effect of magnetic stirring on the microstructure of Co deposits during electrowinning in a chloride solution. It was found that magnetic stirring effectively reduced the negative influence of H2 bubbles on the structure of Co deposits and changed their nucleation and growth behavior, resulting in the preparation of high-quality columnar Co crystals.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Tao Ge, Xiaowei Zhou, Liang Xu, Yan Sun, Cheng Yang, Yongpan Tian, Zhuo Zhao
Summary: In this study, the extraction performance and complexation mechanism of p-di-ethyl-amino-methylthiacalix[4]arene (L) towards Pt(IV) were investigated. The results indicated that L had excellent complexation ability towards Pt(IV) and could selectively extract it from a solution containing multiple competing ions.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yuan Li, Dirk van Zyl
Summary: This paper presents a modified Kynch's approach to explain the hindered settling behavior of suspensions impacted by segregation. The experimental data and predicted results confirm the effectiveness of the proposed method.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yi Fang, Aurora Robledo-Cabrera, Changsheng Peng, Shan Huang, Qi Xiao, Alejandro Lopez-Valdivieso
Summary: With the assistance of mechanical ball milling, the partially oxidized micro-sponge iron (micro-Fe0@Fe2O3) achieves significantly improved removal of Cr(VI) across a broad pH range. Mechanical force eliminates the surface oxide layer and exposes the Fe0 core, leading to sustained reduction of Cr(VI). The efficiency of micro-Fe0@Fe2O3 is strongly influenced by dissolved oxygen, with higher DO resulting in the generation of stable reductant Fe(II) under acidic conditions, while DO consumption hinders the reduction of Cr(VI) under alkaline conditions due to increased pH. Parameters of ball milling operation, especially rotation speed, have a significant impact on the removal of Cr(VI).
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Alton F. Grabsch, Phillip D. Fawell, Michael G. Davies
Summary: High molecular weight partially hydrolysed polyacrylamide (PHPA) is commonly used in mineral exploration drilling to increase fluid viscosity and help maintain the suspension of fine particles. However, clarifying these suspensions can be difficult, and previous studies have found that anionic flocculants are ineffective. This study confirmed that nonionic flocculants can successfully aggregate the particles, indicating that the charged tails of adsorbed PHPA prevent anionic flocculants from accessing the particle surfaces.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
J. S. Guiral-Vega, L. Perez-Barnuevo, J. Bouchard, A. Ure, E. Poulin, C. Du Breuil
Summary: This paper introduces an approach that combines particle properties and process modeling to describe the behavior of iron ore in a laboratory-scale drum-type magnetic separator. Early information on iron ore processing behavior can be obtained through laboratory testing, automated mineralogy analysis, and process modeling.
MINERALS ENGINEERING
(2024)
Review
Engineering, Chemical
Sayed Janishar Anzoom, Ghislain Bournival, Seher Ata
Summary: This review discusses the benefits and challenges of coarse particle flotation, as well as recent developments in improving the process. Coarse particle flotation has various applications and offers advantages in technical, economic, and sustainability aspects. However, it also faces challenges such as particle detachment, transfer between phases, and persistence in the froth phase. Technological advancements, such as fluidized-bed flotation and processes enhancing bubble-particle attachment, have shown promising results in efficiently recovering larger particles.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yimei Xiao, Jinchan Feng, Bingqiao Yang, Huihua Luo, Fang Zhou
Summary: In this study, the use of fulvic acid as a depressant for the flotation separation of chalcopyrite from arsenopyrite was investigated. It was found that fulvic acid strongly depressed arsenopyrite while having little influence on chalcopyrite flotation. The addition of calcium hypochlorite facilitated the adsorption of fulvic acid on arsenopyrite surface.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Bo Hao, Minqiang Fan
Summary: Particle-bubble attachment is crucial in coal and mineral flotation processes. In this study, the attachment process of low-rank coal particles to the bubble surface was simulated, revealing the important role of water film rupture in particle attachment.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Shuwei Wu, Shuai Wang, Guoqiang Wang, Longfei Fan, Jianbo Guo, Zhengbin Liu, Haoyan Zhang, Wei Guan, Yukuan Wang, Yewei Wu
Summary: This study analyzes the motion mode of eccentric roller crushers and proposes a calculation method for productivity. Through laboratory experiments, the results indicate that the proposed method can effectively estimate the productivity of eccentric roll crushers.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Hanna Miettinen, Malin Bomberg, Ozlem Bicak, Zafir Ekmekci, Paivi Kinnunen
Summary: Mineral processing requires large amounts of water, and reducing water consumption through recirculation and closing water loops is important. However, this can lead to the accumulation of contaminants in the process water, which can negatively affect the process performance. In this study, the impact of microorganisms on flotation performance was investigated, and ion exchange was evaluated for removing dissolved sulfur species and microorganisms from water. The results showed that adding microorganisms had a positive effect on flotation selectivity, especially for nickel. Different water types, process water and final tailings water, behaved slightly differently. Ion exchange proved to be effective in removing sulfur species and microorganisms, and dissolved air flotation was a successful pretreatment for ion exchange in removing microorganisms.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Canneng Chen, Song Zhang, Quanjun Liu, Luzheng Chen, Yongjun Xian, Yijie Wang
Summary: This study introduces the use of ultrasonic pretreatment to enhance the flotation separation of elemental sulfur and silver-bearing lead minerals from ultrafine residue. The results show that ultrasonic pretreatment effectively liberates associated sulfur and improves the separation of sulfur and silver-bearing lead minerals. Under optimized conditions, ultrasonic pretreatment significantly improves the recovery and grade of sulfur in the concentrate, as well as the recovery of lead and silver in the tailings.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Genzhuang Li, Fisher Wang, Bern Klein, Michael Deal, Aaron Wright, Hector Mezquita
Summary: This paper presents a stress-based approach for predicting and improving large-scale HIG mill performance through experimental testing and model calibration.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Runpeng Liao, Shuming Wen, Jian Liu, Shaojun Bai, Qicheng Feng
Summary: This study demonstrates that the use of a DDA/DDTC mixed collector system can significantly improve the flotation performance of smithsonite. The synergistic effect between DDA and DDTC is confirmed, and the mixed collector system contributes to a decrease in solution surface tension. The use of FT-IR and XPS confirms the simultaneous physisorption and chemisorption of DDA and DDTC on the smithsonite surface, and contact angle measurements show that the mixed collector effectively enhances the hydrophobicity of smithsonite. Molecular dynamics simulations reveal the multilayer adsorption of DDTC and DDA on the smithsonite surface, with DDTC promoting the adsorption of DDA.
MINERALS ENGINEERING
(2024)
