Article
Computer Science, Interdisciplinary Applications
Achyut Panchal, Suresh Menon
Summary: A hybrid EE-EL formulation is developed in this work for accurate and efficient computational modeling involving a transition between dense and dilute dispersed phase regimes. A smooth and dynamic transition criterion and conversion algorithm enable smooth transition between the two representations of the dispersed phase. The method's ability to dynamically transition from EE to EL and vice versa is evaluated in numerical tests and simulations.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Mechanics
Ananda J. Jadhav, Mostafa Barigou
Summary: This study develops a 3D Eulerian-Lagrangian CFD model to simulate the turbulent flow and mixing of coarse dense particles in a batch vessel. The model is validated by experimental measurements and shows good agreement in phase-velocity components, particle slip velocities, and particle concentration. The model can be extended to study complex particle-liquid suspensions and provide valuable Lagrangian data for other modeling techniques.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2022)
Review
Engineering, Chemical
Gianandrea Vittorio Messa, Qi Yang, Oluwaseun Ezekiel Adedeji, Zdenek Chara, Carlos Antonio Ribeiro Duarte, Vaclav Matousek, Maria Graca Rasteiro, R. Sean Sanders, Rui C. Silva, Francisco Jose de Souza
Summary: Researchers have been focusing on slurry pipe transport for decades, using Computational Fluid Dynamics (CFD) to simulate flow processes at a local level. The CFD approach shows potential in providing detailed information on slurry pipe flows compared to traditional theoretical models, with a focus on assessing uncertainty and evaluating predictive capacity of existing models.
Article
Engineering, Chemical
Felipe Queiroz Mendes, Dirceu Noriler
Summary: This study proposes a new numerical simulation method to predict the efficiency curve of cyclone separators by calculating the characteristic diameter. Simulations were conducted for different cases and compared with experimental data, demonstrating the accuracy and feasibility of the proposed model.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Yuan Yao, Jesse Capecelatro
Summary: This study presents a numerical framework for accurately computing electrically charged particles in wall-bounded flows, removing the contribution from periodic images by agnostically solving the electric Poisson equation and strategically mapping particle charges to the grid, while enforcing appropriate boundary conditions using a signed-distance levelset function.
Review
Engineering, Mechanical
N. Matos, M. Gomes, V. Infante
Summary: This review study discusses various methods for soft body collision modeling, including mesh and mesh-free simulation models, as well as approaches such as Eulerian and Lagrangian methods. These methods play an important role in reducing development and testing costs and are significant for protecting aircraft, automobiles, etc.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Thermodynamics
Haoyu Ding, Jin Zhao, Zhenyu Zhang, Kai Xu, Luxin Fu, Xu He
Summary: The factors influencing the formation of impinged spray are analyzed using computational fluid dynamics (CFD) modeling. Free spray and impinging sprays with three impinging distances are simulated using the Eulerian-Lagrangian multiphase method. The results are validated with experimental data. The impact of air flow, generated by gas entrainment of spray, also influences the spray.
Article
Engineering, Environmental
Justin Weber, Jonathan E. Higham, Jordan Musser, William D. Fullmer
Summary: This study focuses on quantifying the visible depth of field in a dense fluidized bed by extracting particle velocity from simulated data and high-speed videos, comparing the errors of different particle tracking methods. The results show that at a depth of one particle diameter, all three tracking codes provide accurate measurements, but errors increase when looking at full bed video measurements.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Shuyue Li, Yuting Zhuo, Yansong Shen
Summary: For the first time, a multi-fluid CFD model is developed to describe the gas-solid-powder reactive flow in a full-loop CDCL unit. The model is validated by comparing with experimental data. This work provides a useful tool for designing and optimizing CLC processes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Computer Science, Interdisciplinary Applications
C. Fernandes, S. A. Faroughi, R. Ribeiro, A. Isabel, G. H. McKinley
Summary: Accurately resolving the coupled momentum transfer between the liquid and solid phases of complex fluids is essential in multiphase transport processes. This study uses direct numerical simulations and closure drag laws to investigate the flow characteristics of viscoelastic fluids through static random arrays of spherical particles.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Environmental
Shaotong Fu, Limin Wang
Summary: A new algorithm called unresolved LBM-DEM is proposed for discrete particle simulation. It combines lattice Boltzmann method (LBM) for fluid phase and discrete element method (DEM) for particle phase, with immersed moving boundary (IMB) used for gas-solid coupling. The method has advantages in resolving Geldart A particles and computational efficiency, with GPU parallel computation implemented. Validation tests showed good agreement with experimental data and one to two orders of magnitude speed up compared to traditional algorithms. This suggests unresolved LBM-DEM as a promising strategy for fluidization and multiphase flows.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Computer Science, Interdisciplinary Applications
H. Eshraghi, E. Amani, M. Saffar-Avval
Summary: In this article, new coarse-graining algorithms for simulating particle-laden flows are proposed. The algorithms include variants of the Reproducing Kernel Particle Methods (RKPM) and an extended Diffusion Two-Step Method (DTSM). The performance of the algorithms is compared to other widely-used algorithms, and it is found that the first-order RKPM performs the best in terms of various attributes. However, due to its higher computational cost, the extended DTSM is recommended as an affordable alternative for large-scale problems.
JOURNAL OF COMPUTATIONAL PHYSICS
(2023)
Article
Energy & Fuels
Chunlei Li, Qitai Eri
Summary: This paper compares the application of two Eulerian-Lagrangian methods, CFD-DEM and MPPIC, in simulating biomass gasification in a fluidized bed, focusing on predicting product gas composition, trajectories, and particle diameters. The results show minimal difference in predicting H-2 share between the two methods, and demonstrate that both methods exhibit similar trends in reactor-scale applications.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Review
Energy & Fuels
Zhicheng Wen, Liehui Zhang, Huiying Tang, Junsheng Zeng, Xiao He, Zhidong Yang, Yulong Zhao
Summary: Proppant transport is crucial in hydraulic fracturing and accurate understanding of its behavior is important. Numerical simulation, especially Euler-Lagrangian methods, has become a practical tool for studying proppant transport. Important mechanisms and challenges in these methods are discussed in this study.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Mechanics
Zhenlin Guo, Fei Yu, Ping Lin, Steven Wise, John Lowengrub
Summary: A new two-phase fluid model, q-NSCH-DD, is proposed to simulate two-phase flows with moving contact lines in complex geometries while maintaining thermodynamic consistency. Numerical analysis confirms the effectiveness and accuracy of the model.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Chemical
Tingwen Li
Article
Engineering, Chemical
Tingwen Li, Limin Wang, William Rogers, Guofeng Zhou, Wei Ge
Article
Engineering, Chemical
Tingwen Li, Yongmin Zhang, Fernando Hernandez-Jimenez
Article
Engineering, Chemical
Tingwen Li, Jean-Francois Dietiker, William Rogers, Rupen Panday, Balaji Gopalan, Greggory Breault
Article
Engineering, Chemical
Xi Gao, Tingwen Li, Avik Sarkar, Liqiang Lu, William A. Rogers
CHEMICAL ENGINEERING SCIENCE
(2018)
Article
Engineering, Chemical
Yongmin Zhang, Chunxi Lu, Tingwen Li
Article
Engineering, Chemical
Tingwen Li, John Grace, Xiaotao Bi, Kevin Reid, Michael Wormsbecker
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2012)
Article
Engineering, Chemical
Tingwen Li, John Grace, Xiaotao Bi, Kevin Reid, Michael Wormsbecker
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2012)
Article
Engineering, Chemical
Tingwen Li, Jean-Francois Dietiker, Mehrdad Shahnam
CHEMICAL ENGINEERING SCIENCE
(2012)
Article
Engineering, Chemical
Yupeng Xu, Tingwen Li, Liqiang Lu, Sina Tebianian, Jamal Chaouki, Thomas W. Leadbeater, Rouzben Jafari, David J. Parker, Jonathan Seville, Naoko Ellis, John R. Grace
CHEMICAL ENGINEERING SCIENCE
(2019)
Article
Engineering, Chemical
Tingwen Li, Rahul Garg, Janine Galvin, Sreekanth Pannala
Article
Engineering, Chemical
Jean-Francois Dietiker, Tingwen Li, Rahul Garg, Mehrdad Shahnam
Article
Engineering, Chemical
Ronald W. Breault, Tingwen Li, Phillip Nicoletti
Correction
Engineering, Chemical
Liqiang Lu, Xiaowen Liu, Tingwen Li, Limin Wang, Wei Ge
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.