Article
Mathematics, Applied
Olivier Hurisse
Summary: A numerical scheme based on the classical SIMPLE algorithm is presented, using a MAC discretization on staggered meshes for spatial derivatives estimation. The scheme is applied to a two-layer two-fluid model to simulate gas-liquid flows in pipes with gravity effects. The coupling of convective terms and source terms is achieved without the CFL limitation, thanks to new forms of the source terms.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2022)
Article
Engineering, Chemical
Andres Cepeda-Vega, Rafael Amaya-Gomez, Miguel Asuaje, Carlos Torres, Carlos Valencia, Nicolas Ratkovich
Summary: A Generalized Additive Model (GAM) is proposed to predict pressure drop in gas-liquid two-phase flow, utilizing 21 different dimensionless numbers. The model demonstrates high prediction capacity and interpretability, and effectively describes the pressure gradient in different flow patterns. Regularization technique is used to filter variables, and certain dimensionless numbers exhibit significant importance in explaining the pressure gradient.
Article
Engineering, Marine
Novan Tofany, Taufiq Wirahman
Summary: This study investigates current-induced scour and tunnel erosion around a submarine pipeline in both clear-water and live-bed regimes using a two-phase model. The model is validated with experimental data and reveals similar driving mechanisms for onset and tunnel erosion in both regimes, with differences in time and magnitude scales.
Article
Mechanics
Abdullah Aljasmi, Muhammad Sahimi
Summary: The study proposes a method to accelerate image-based computations for simulating multiphase flow with the color-fluid lattice Boltzmann method, successfully speeding up the calculations. In simulations of two-phase flow problems, the method demonstrates a significant acceleration in computations.
Article
Computer Science, Interdisciplinary Applications
Kai Yang, Takayuki Aoki
Summary: This study proposes an evolving pressure projection method for numerical computations of the weakly compressible Navier-Stokes equations, achieving fully explicit time integration using an independent pressure evolution equation. By iteratively computing the pressure evolution equation coupled with a projection step to damp acoustic waves in weakly compressible fluid flow, the computational efficiency is not significantly increased.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Jianzhen Qian, Hao Pan, Pei Wang
Summary: A new local tensor-type artificial viscosity is proposed for two-dimensional Lagrangian staggered grid hydrodynamics, ensuring dissipation of kinetic energy and damping mesh instabilities. The new viscosity force vanishes in case of expansion, reducing dissipation error, and is demonstrated to be accurate and robust through benchmark tests.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Mechanics
Bonchan Koo, Seungjoon Chang, Hyoung-Ho Kim, Sung Goon Park
Summary: This study presents a novel integration of dynamic mode decomposition (DMD) with physical regulations to address the limitations of purely data-driven models in natural gas pipeline flow. The proposed model ensures that the predictions adhere to physical laws by considering the mass conservation law, resulting in a multi-objective optimization problem. Real-world data evaluation demonstrates the model's superior accuracy and its ability to avoid physically implausible predictions, especially with limited data. Despite a slight increase in computational cost, the model achieves significant error reduction and robustness with scarce training data, fulfilling the critical need for accurate and reliable predictions that respect physical constraints and enhancing the interpretability and validity of the results.
Article
Computer Science, Interdisciplinary Applications
Faezeh Moghaddas, Abdorreza Kabiri-Samani, Maryam Zekri, Hazi M. Azamathulla
Summary: In this study, ANN and ANFIS models were used to predict pressure loss in air-water two-phase slug flow, with APSO applied to optimize the results. Experimental tests were used to validate the predictions, showing that ANFIS-APSO model outperformed other models in predicting the pressure loss coefficient. Good agreement between estimated and measured values was achieved, indicating the accuracy of the proposed models compared to existing empirical correlations.
JOURNAL OF HYDROINFORMATICS
(2021)
Article
Nuclear Science & Technology
Jianping Long, Bao-Wen Yang, Bin Zhang, Sipeng Wang
Summary: In this paper, a numeric scheme consisting of the 3-D Two-Fluid Model and the RPI wall boiling model was validated for two-phase flow instabilities simulation. The validated numeric scheme was used to study two-phase flow instabilities in a vertical circular channel, and the flow instability was analyzed by both the Lumped Parameter Approach and the Distributed Parameter Approach. Additionally, the stability of the vertical circular tube channel flow boiling system was studied using a stable map based on the subcooling number versus the phase change number.
PROGRESS IN NUCLEAR ENERGY
(2022)
Article
Geosciences, Multidisciplinary
Na Wei, Lin Jiang, Shuanshi Fan, Anqi Liu, Haitao Li, Shenghui Zhang, Chao Zhang, Jin Xue
Summary: An experimental device for controlling the maldistribution of gas-liquid two-phase flow is developed in this article. Test experiments under different flow patterns reveal the control law of flow pattern to liquid and gas maldistribution, forming a control scheme for gas-liquid two-phase flow in horizontal pipelines.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
Julio Cesar S. Nascimento, Adriano dos Santos, Carlos E. Pico Ortiz, Adolfo Puime Pires
Summary: This paper presents a thermal compositional simulator for modeling two-phase multicomponent flow in wellbores and pipes, including thermal effects and thermodynamics calculations based on the Peng-Robinson equation of state. The simulator discretizes the system of equations using an implicit technique and finite volume method, providing accurate predictions of pressure and temperature behavior.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Thermodynamics
Yeqi Cao, Qiang Xu, Haiyang Yu, Bo Huang, Tianyu Liu, Liejin Guo
Summary: The study of fully developed interface characteristics at different flow patterns in industrial-grade long-distance pipelines is crucial for constructing multiphase flow models and ensuring flow assurance in oil and gas pipelines. This paper visualizes the phase interface structures of dispersed bubble flow and three slug subflow patterns in a 46 mm ID, 1657 m long pipeline. The interface characteristics between elongated bubbles and liquid film effectively distinguish different slug subflow patterns, and a quantitative division criterion is proposed. The paper establishes a transition boundary prediction model and a flow pattern map, providing correlations for the radial position of elongated bubble head, liquid film thickness, and elongated bubble velocity in long pipelines.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2023)
Article
Mechanics
Chiyu Xie, Jingwei Zhu, Hongen Yang, Jiulong Wang, Lin Liu, Hongqing Song
Summary: This study proposes a new artificial intelligence prediction model that can accurately predict the relative permeability curve in subsurface engineering problems. The model can handle 3D digital rocks with variable sizes and achieves a high prediction accuracy.
Article
Engineering, Chemical
Muhammad Adnan, Jie Sun, Nouman Ahmad, Jin Jia Wei
Summary: The study compared the performance of Eulerian-Eulerian and Eulerian-Lagrangian numerical approaches in describing the hydrodynamic behavior of a pilot-scale bubbling bed reactor. The sub-grid drag correction based on the energy minimization and multiscale theory was found to be the key modeling parameter for both models. Both models predicted similar hydrodynamics behavior, with TFM achieving better accuracy in terms of axial and radial solids concentration profiles. The grid size analysis showed that DDPM generated a better grid-independent solution than TFM, making it a suitable candidate for large-scale industrial applications on coarser grids. Other parameters like time-step, time-averaging interval, specularity coefficient, restitution coefficient, reflection coefficient, and numbers of parcels had minor effects on the overall hydrodynamics behavior of the reactor.
Article
Engineering, Geological
Marek Krzaczek, Michal Nitka, Jacek Tejchman
Summary: The research aimed to demonstrate the impact of thin porous interfacial transition zones (ITZs) on fluid flow in unsaturated concrete. A novel coupled approach was developed, merging discrete element method (DEM) with computational fluid dynamics (CFD), to simulate the two-phase flow of water and moist air in unsaturated concrete. The results showed that the porous ITZs can reduce sorption and accelerate the saturation of pores.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Thermodynamics
Juheng Yang, Wei Wang, Guoyun Shi, Dan Wang, Jing Gong, Bohui Shi, Lin Ding, Yang Liu, Shangfei Song
FLUID PHASE EQUILIBRIA
(2019)
Article
Energy & Fuels
Yuchuan Chen, Bohui Shi, Yang Liu, Qianli Ma, Shangfei Song, Lin Ding, Xiaofang Lv, Haihao Wu, Wei Wang, Haiyuan Yao, Jing Gong
Article
Energy & Fuels
Di Fan, Jing Gong, Shengnan Zhang, Guoyun Shi, Qi Kang, Changchun Wu
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Energy & Fuels
Bingyuan Hong, Xiaoping Li, Shangfei Song, Shilin Chen, Changlong Zhao, Jing Gong
Article
Engineering, Chemical
Bingyuan Hong, Xiaoping Li, Guojia Di, Yu Li, Xingshuai Liu, Shilin Chen, Jing Gong
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2019)
Article
Computer Science, Interdisciplinary Applications
Bingyuan Hong, Xiaoping Li, Guojia Di, Shangfei Song, Weichao Yu, Shilin Chen, Yu Li, Jing Gong
COMPUTERS & INDUSTRIAL ENGINEERING
(2020)
Article
Thermodynamics
Di Fan, Jing Gong, Shengnan Zhang, Guoyun Shi, Qi Kang, Yaqi Xiao, Changchun Wu
Summary: The transient composition tracking method developed for natural gas pipe networks uses control volume and one-dimensional unsteady heat transfer models for simulation, enables real-time prediction of gas composition and consideration of its influence on property parameters. The method shows reliability and accuracy in case studies, but caution should be taken regarding the impact of injecting LNG/H-2.
Article
Energy & Fuels
Guoyun Shi, Shangfei Song, Bohui Shi, Jing Gong, Dongliang Chen
Summary: This study proposes a new transient model for gas hydrate slurry flow, which combines a two-fluid model and temperature equation for describing the two-phase flow and establishes equations for the particulate phase flow using Eulerian and Lagrangian approaches. The model is verified and applied to analyze the transient behavior of gas hydrate slurry multiphase flow, as well as conducting sensitivity analysis on flowrate, initial droplet size, and drag force. These results provide practical insight into hydrate slurry multiphase flow and contribute to better hydrate management in the petroleum industry.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Review
Energy & Fuels
Bohui Shi, Shangfei Song, Yuchuan Chen, Xu Duan, Qingyun Liao, Shunkang Fu, Lihao Liu, Jinhao Sui, Junpeng Jia, Haotian Liu, Yumo Zhu, Chenxi Song, Decai Lin, Ting Wang, Junao Wang, Haiyuan Yao, Jing Gong
Summary: This review discusses the significant progress in gas hydrate flow assurance research in China, including hydrate structures, management strategies, development of phase equilibrium models, and kinetics research. Additionally, the current research status and existing problems of hydrate slurry flow are analyzed, indicating significant room for improvement in accurate quantitative calculations and risk assessments.
Article
Engineering, Environmental
Guoyun Shi, Weichao Yu, Kun Wang, Fuhua Dang, Jing Gong, Yanan Lu
Summary: A methodology for quantifying the economic risk of a natural gas transmission pipeline system is developed in this study, considering the impact of line pack. The study estimates the failure probability of key components and utilizes a transient compressible model for consequence analysis. By combining failure probability estimation with consequence analysis, the economic risk of accidents can be evaluated, and suggestions to decrease the risk are proposed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Energy & Fuels
Qingyun Liao, Bohui Shi, Sha Li, Shangfei Song, Yuchuan Chen, Jinjun Zhang, Haiyuan Yao, Qingping Li, Jing Gong
Summary: This study used molecular dynamics simulations to investigate the impact of wax molecules on methane hydrate formation. The results show that different types and quantities of wax molecules have varying effects on hydrate growth. The addition of wax molecules may promote gas bubble formation and subsequently inhibit hydrate growth.
Article
Energy & Fuels
Sihang Chen, Jing Gong, Wang Li, Qi Yang, Guoyun Shi, Xiaoping Li, Bohui Shi, Shangfei Song, Pengfei Lv, Di Fan, Xu Duan
Summary: This study investigated the migration and evolution of bubbles in oil-pipelines during gas-liquid flow, revealing that bubbles interact and migrate in multi-scales, affecting the transportation of both gas and liquid phases. A new transient model combined with the population balance model and Eulerian-Lagrangian coupling scheme was proposed to describe bubble movement and interaction. The results showed that the inclination of the pipe and liquid Froude number had a significant impact on bubble migration capacity and size distribution.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Guoyun Shi, Bo Yu, Kaituo Jiao, Weitao Zhang, Haiwang Li
Summary: This paper introduces a strongly conservative model for computational fluid dynamics in cylindrical coordinates, overcoming the limitations and inherent errors of the standard model. By deriving the strongly conservative form of the governing equations and proposing an improved method for evaluating flux, this model preserves numerical conservation and allows for larger time steps. Experimental results demonstrate the model's strong conservatism in cylindrical coordinates and its potential for general curvilinear coordinates with complex boundaries.
COMPUTERS & FLUIDS
(2024)
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)
