Particuology最新文献_第8页

Separation dynamic model of air dense medium fluidized bed for coal beneficiation and control 煤选风密介质流化床分离动力学模型及控制

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-12-06 DOI: 10.1016/j.partic.2025.11.019

Gansu Zhang , Tianxin Li , Hongyang Li , Zhiqiang Li , Shuxian Su , Xuan Xu , Wei Dai , Liang Dong

{"title":"Separation dynamic model of air dense medium fluidized bed for coal beneficiation and control","authors":"Gansu Zhang , Tianxin Li , Hongyang Li , Zhiqiang Li , Shuxian Su , Xuan Xu , Wei Dai , Liang Dong","doi":"10.1016/j.partic.2025.11.019","DOIUrl":"10.1016/j.partic.2025.11.019","url":null,"abstract":"<div><div>This study presents a comprehensive framework for the separation dynamic model of Air Dense Medium Fluidized Bed (ADMFB) to promote the intelligentization of coal preparation. The framework is a double-layer composite structure. In the outer layer, the static model of partition was extended from Dense Medium Cyclones to ADMFB. In the inner layer, the dynamic model of bed density was developed from the coupling model to the decoupling model with self-balancing characteristics. The model predicts product yield and ash content, which is validated against industrial separation data. The baseline performance is good but unstable, with maximum relative error 38.43 % and minimum relative error 4.48 % for coal ash content. To address this, an ash correction algorithm was innovatively put forward by introducing organic efficiency <em>θ</em>. The performance improvement is significant that coal ash content has maximum relative error 5.97 % and minimum relative error 0.48 %. Finally, Model Predictive Control (MPC) was implemented following the global linearization of the nonlinear bed density model, whose convergence speed to reach the tracking value is 46 % faster than constant control. Overall, this work provides a pathway for coal preparation plants to achieve more stable and intelligent production.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 320-335"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation on the reaction characteristics of a coal-water slurry particle during entrained-flow gasification process 带流气化过程中水煤浆颗粒反应特性的数值模拟

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-11-26 DOI: 10.1016/j.partic.2025.11.012

Yan Gong , Bo Zhao , Wenjing Zhao , Xuning Wang , Qinghua Guo , Yifei Wang , Jin Bai , Guangsuo Yu

{"title":"Numerical simulation on the reaction characteristics of a coal-water slurry particle during entrained-flow gasification process","authors":"Yan Gong , Bo Zhao , Wenjing Zhao , Xuning Wang , Qinghua Guo , Yifei Wang , Jin Bai , Guangsuo Yu","doi":"10.1016/j.partic.2025.11.012","DOIUrl":"10.1016/j.partic.2025.11.012","url":null,"abstract":"<div><div>Gasification technology serves as the cornerstone of the modern coal chemical industry. High-temperature particles in entrained-flow gasifiers act as the primary reaction medium, whose reactivity is inherently dependent on particle size, porosity, and local reaction environment. Current experimental investigations on particles within gasifiers predominantly rely on visualization systems, yet face significant challenges in precise particle tracking and quantitative analysis, particularly in diagnosing volatile release processes. This study employed computational fluid dynamics (CFD) numerical simulations to develop a multiphase model to isolate single particle behavior from bulk particle group during coupled combustion-gasification process of coal-water slurry (CWS). Discrete coal particle models with varying configurations were developed to compare reaction characteristics between isolated and interacting particles, while analyzing temperature fields and reaction rate distributions across three porosity levels. Verification demonstrated that the implemented models effectively described the reaction characteristics of coal particles. Results reveal strong correlation between the temperature field distribution and the volatile molar fraction in CWS particle, with H<sub>2</sub>, H<sub>2</sub>O, and CO accumulation observed at particle cores. Coupling effects of heat and mass transfer between particles significantly influence reaction rates and thermal profiles, governed by the particle spacing and heat/mass transfer efficiency, whereas the effects of porosity remain relatively minor.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 68-82"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145658404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interparticle forces and their regulation mechanisms in iron ore granulation: A review 铁矿石造粒过程中颗粒间力及其调控机制综述

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-11-28 DOI: 10.1016/j.partic.2025.11.014

Dongcai Luo, Renhao Tian, Shaoxian Xie, Yuxiao Xue, Yang You, Xuewei Lv

{"title":"Interparticle forces and their regulation mechanisms in iron ore granulation: A review","authors":"Dongcai Luo, Renhao Tian, Shaoxian Xie, Yuxiao Xue, Yang You, Xuewei Lv","doi":"10.1016/j.partic.2025.11.014","DOIUrl":"10.1016/j.partic.2025.11.014","url":null,"abstract":"<div><div>Iron ore granulation is a critical role in the production of sinter, with the resulting granule size distribution and strength directly influencing the permeability of the subsequent sinter bed and the quality of the sinter. Granulation involves the process of particle coalescence and growth under the influence of forces such as collision, compression, and friction, resulting in larger granules with a narrower size distribution. The inter-particle forces are governed by the properties of the iron ore, granulation equipment, and process parameters. Therefore, the appropriate granulation process and optimized configuration of iron ore plays a significant role in improving the technical and economic indicators of sintering. This paper reviews the mechanisms of particle growth during the granulation process, focusing on the microscopic interparticle forces that drive particle coalescence. A central theme of this review is to establish the critical link between these microscopic forces and the macroscopic process parameters. Therefore, it subsequently analyzes how raw material properties, equipment design, and operating conditions exert their influence precisely by regulating these interparticle forces. Finally, the paper summarizes the current challenges and future research directions in iron ore granulation. The results provide a theoretical basis for comprehensive understanding of iron ore granulation and efficient production of high-quality granules.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 252-271"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145683485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation on reactive crystallization of Li-ion batteries precursor Ni(OH)2 in a stirred tank: Effect of structural factors on particle size and distribution 锂离子电池前驱体Ni(OH)2在搅拌槽中反应结晶的数值研究：结构因素对颗粒大小和分布的影响

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-12-05 DOI: 10.1016/j.partic.2025.12.001

Junhai Deng , Jiuhua Chen , Shuyao Feng , Yunyun Tian , Yingqi Liao , Bi Luo , Luchang Han , Yefeng Zhou

{"title":"Numerical investigation on reactive crystallization of Li-ion batteries precursor Ni(OH)2 in a stirred tank: Effect of structural factors on particle size and distribution","authors":"Junhai Deng , Jiuhua Chen , Shuyao Feng , Yunyun Tian , Yingqi Liao , Bi Luo , Luchang Han , Yefeng Zhou","doi":"10.1016/j.partic.2025.12.001","DOIUrl":"10.1016/j.partic.2025.12.001","url":null,"abstract":"<div><div>The stirred tank reactor is widely used for preparing Li-ion batteries precursors, and the high-performance materials are utilized in various fields such as electronic devices. However, controlling the particle characteristics remains a significant challenge due to the complex interaction between fluid dynamics and crystallization kinetics. Therefore, this work proposes the computational fluid dynamics-population balance model coupled model to simulate Ni(OH)<sub>2</sub> reactive crystallization. By altering the structure and operation, this work analyzes effects of turbulence parameters on particle characteristics. Results show that increasing the height, baffle number and rotational speed enhances turbulence parameters, which reduces the Sauter mean diameter about 1.08–2.14 times and decreases the span from 1.6 to 1.17. Axial-flow impellers generate lower turbulent dissipation and shear force compared to radial-flow impellers, causing less particle breakage and better suitability for reactive crystallization. The wave bottom enhances turbulent dissipation about 1.19–1.38 times compared to flat and round bottom, improving flow circulation and reducing dead zones. Moreover, experiment and simulation demonstrate consistent trend in particle size and distribution under different baffle numbers, with morphology becoming better. This work provides important theoretical support for optimizing reactor design and enhancing reactive crystallization, facilitating the production of high-performance materials.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 307-319"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145735087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrodynamics of pressurized cohesive fluidized beds: A CFD-DEM study 加压黏合流化床流体动力学：CFD-DEM研究

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-11-21 DOI: 10.1016/j.partic.2025.11.007

Zhiyong Jia , Xiankun Shen , Xiaocheng Lan , Tiefeng Wang

{"title":"Hydrodynamics of pressurized cohesive fluidized beds: A CFD-DEM study","authors":"Zhiyong Jia , Xiankun Shen , Xiaocheng Lan , Tiefeng Wang","doi":"10.1016/j.partic.2025.11.007","DOIUrl":"10.1016/j.partic.2025.11.007","url":null,"abstract":"<div><div>The combined effects of operating pressure and interparticle cohesion on fluidization behavior remain a practical yet insufficiently explored topic. This study employs the CFD-DEM approach to investigate the impact of van der Waals force and operating pressure on fluidization hydrodynamics, focusing on bubble dynamics, pressure drop fluctuations, and particle-scale characteristics. It was observed that the fluidization regime transitions from stable bubbling to slugging when the Bond number (<em>Bo</em>) exceeds 2.4 under atmospheric pressure, whereas elevated pressures effectively mitigate the disruptive influence of cohesion and stabilize bubbling behavior. Moreover, while the bubble size decreases by about 20% as <em>Bo</em> increases from 0 to 5.6 under atmospheric pressure, it remains nearly unchanged with <em>Bo</em> at elevated pressures. The standard deviation of pressure drop fluctuations decreases, whereas the average frequency increases with rising cohesion under atmospheric pressure. Once again, increased pressures counteract these effects. Further analysis reveals that elevated pressure enhances the gas-holding capacity of the emulsion phase, leading to a 74% reduction in average cohesion force as pressure rises from 1 to 80 bar. The enhanced gas-solid interactions, evidenced by the increased drag coefficients, provides a physical perspective for understanding the counteracting effects of elevated pressures on cohesion.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 113-124"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145658412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tunable carbon release from melt-blended carbon source particles for simultaneous denitrification in low-C/N wastewater 熔融混合碳源颗粒在低碳氮比废水中同步反硝化的可调碳释放

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-11-06 DOI: 10.1016/j.partic.2025.10.021

Siyuan Yin , Yuanyuan Shao , Jesse Zhu

{"title":"Tunable carbon release from melt-blended carbon source particles for simultaneous denitrification in low-C/N wastewater","authors":"Siyuan Yin , Yuanyuan Shao , Jesse Zhu","doi":"10.1016/j.partic.2025.10.021","DOIUrl":"10.1016/j.partic.2025.10.021","url":null,"abstract":"<div><div>Achieving simultaneous carbon release and denitrification (SCRD) remains a key challenge for solid carbon sources (SCSs) in low-C/N wastewater treatment. In this project, novel melt-blended advanced carbon sources (MB-ACSs) with tunable compositions were developed to regulate SCRD through structural design, where MB-ACSs were engineered to form interpenetrating networks with controllable porosity and diffusivity based on the different compositions of corn cob (CC) and polyhydroxybutyrate (PHB) within a polyethylene (PE) matrix. Among them, MB-433 (40 wt% PE, 30 wt% PHB, 30 wt% CC) exhibited the most balanced structure, integrating rapid CC-derived dissolution, PHB-mediated sustained release, and PE-supported stability. All MB-ACSs displayed a biphasic release pattern – initial surface dissolution followed by internal diffusion – whereas MB-433 maintained a steady carbon supply ideally synchronized with microbial demand. Denitrification assays conducted across a wide range of nitrate loads (25–1000 mg NO<sub>3</sub><sup>−</sup>-N/L) and C/N (0, 1.5, 3) showed that MB-433 consistently achieved 60–80 % nitrate removal under moderate conditions (25–50 mg NO<sub>3</sub><sup>−</sup>-N/L), avoided inhibition under high-loading and high-carbon conditions (1000 mg NO<sub>3</sub><sup>−</sup>-N/L, C/N = 3), and maintained complete denitrification even in the absence of external carbon (C/N = 0). Logistic and exponential fittings confirmed MB-433's superior capacity on SCRD, while Monod modeling revealed high denitrification potential (<em>V</em><sub><em>max</em></sub> = 0.172 mg/L d) and strong nitrate affinity (<em>K</em><sub><em>s</em></sub> = 8.42 mg/L).</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 241-251"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145659139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High temperature micro fluidization of limestones 石灰石的高温微流化

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-11-05 DOI: 10.1016/j.partic.2025.10.020

Peter Asiedu-Boateng , Nana Yaw Asiedu , Gregory S. Patience , Jonathan R. McDonough , Vladimir Zivkovic

{"title":"High temperature micro fluidization of limestones","authors":"Peter Asiedu-Boateng , Nana Yaw Asiedu , Gregory S. Patience , Jonathan R. McDonough , Vladimir Zivkovic","doi":"10.1016/j.partic.2025.10.020","DOIUrl":"10.1016/j.partic.2025.10.020","url":null,"abstract":"<div><div>Micro fluidized bed reactors (MFBRs) operating at high temperatures hold great potential for finding suitable conditions for kinetic screening experiments for CO<sub>2</sub> capture sorbents. Additionally, high temperature hydrodynamics study using MFBRs prior to kinetics analysis could enable the acquisition of realistic and intrinsic kinetic data in transport phenomena-induced processes but the existence of wall effects could negatively impact quality of fluidization and cause delayed fluidization even though it may aid reaction kinetics. High temperature hydrodynamic studies in MFBRs remains relatively unexplored despite its enormous potential. In this work, we designed a high temperature MFBR system to perform detailed hydrodynamic experiments using pressure drop characterization approach to analyze the effect of temperature and bed-wall friction on various fluidization regimes with Geldart B limestone sorbents by controlling temperature with portable induction heater. Results show that minimum fluidization velocity decreases with increasing temperature for both Nauli and Oterpkolu limestones due to increased Van der Waals forces and the cohesiveness between particles at elevated temperature; with the gradient of the decrease in minimum fluidization velocity being steeper between ambient temperature and 400 °C compared to the drop between 400 and 800 °C. At 600 °C, bubbles started appearing at air flow rate of (0.065 m/s) but bubbling started at 0.142 m/s and 400 °C. Frequency spectra revealed that the superficial gas velocity at which a dominant frequency is attained (when slugging fluidization begins) reduces as the operating temperature increases. Additionally, bed pressure drop overshoot per volume of particle bed increases with increasing operating temperature.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 156-167"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145658420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of fluidization dynamics and liquid evaporation on particle growth in a top-spray fluidized bed 流态化动力学和液体蒸发对顶喷流化床颗粒生长的影响

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-11-29 DOI: 10.1016/j.partic.2025.11.013

Han Pu, Jiliang Ma, Jialiang Cai, Yi Wang, Xiaoping Chen, Cai Liang, Daoyin Liu, Meng Liu

{"title":"Influence of fluidization dynamics and liquid evaporation on particle growth in a top-spray fluidized bed","authors":"Han Pu, Jiliang Ma, Jialiang Cai, Yi Wang, Xiaoping Chen, Cai Liang, Daoyin Liu, Meng Liu","doi":"10.1016/j.partic.2025.11.013","DOIUrl":"10.1016/j.partic.2025.11.013","url":null,"abstract":"<div><div>The phenomenon of particle agglomeration in a liquid-containing fluidized bed is closely associated with the interactions between gas and solid phases, as well as the evaporation of the liquid component. This study performs an experimental investigation to examine the interactions among particle growth, fluidization behavior, and droplet evaporation within a continuous top-spray fluidized bed system. The research indicates that increased drying air temperatures generate severe drying conditions that promote the conversion of liquid bridges to solid bridges between particles. This conversion significantly decreases the nucleation time and encourages a more consistent distribution of agglomerate sizes. Additionally, a rise in the spraying rate and binder viscosity, strengthen the cohesive forces among particles, resulting in the development of larger agglomerates. The evaporation of the liquid binder exhibits a substantial correlation with the behavior of bubbles within the bed, which in turn affects particle growth and the chaotic dynamics of the fluidized bed system. The process of particle growth is delineated into two separate phases: nucleation growth and shell growth. Notably, the duration of nucleation growth phase exceeds that of the shell growth phase. Ultimately, a regime map has been developed to evaluate the feasibility of the spray granulation process concerning fluidization and drying parameters. The findings suggest that excessively low fluidization numbers, coupled with inadequate drying conditions, could lead to the failure of the liquid-containing fluidization process.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 280-292"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145683488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Promoting simulation reliability for burden distribution of blast furnace: Parameters measurement and calibration of lump ores 提高高炉炉料分布模拟可靠性：块状矿石参数测量与标定

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-11-20 DOI: 10.1016/j.partic.2025.11.009

Runpei Wei, Yu Liu, Hao Wu, Zile Peng, Yue Kang, Qingguo Xue, Haibin Zuo

{"title":"Promoting simulation reliability for burden distribution of blast furnace: Parameters measurement and calibration of lump ores","authors":"Runpei Wei, Yu Liu, Hao Wu, Zile Peng, Yue Kang, Qingguo Xue, Haibin Zuo","doi":"10.1016/j.partic.2025.11.009","DOIUrl":"10.1016/j.partic.2025.11.009","url":null,"abstract":"<div><div>With the increasing proportion of low-carbon burden, represented by lump ores, charged into blast furnaces, the lack of fundamental physical property parameters became a key constraint on in-depth research of burden distribution through numerical simulation. In this study, the intrinsic and contact parameters of lump ores were systematically investigated for the first time. Two typical types, hematite and limonite, which are the most commonly used lump ores in blast furnaces, were selected as the research objects. The intrinsic parameters of the two lump ores, including density, Poisson's ratio, and elastic modulus, were determined according to standard testing methods. Physical experiments were designed to measure contact parameters, through which the coefficients of rolling friction, static friction, and restitution between lump ores, as well as between each ore and steel plate or cement board, were obtained. Parameter calibration was subsequently carried out using discrete element method simulations, ultimately obtaining the representative values for these physical parameters. This study laid the foundation for accurate simulation of lump ore granular motion in ironmaking processes. The methodologies developed or refined in this study have significantly reduced the difficulty of obtaining relevant parameters and avoided the use of data lacking actual physical meaning.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 14-24"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145658400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanistic analysis of drag force model for carbon nanotube fluidized bed based on CFD-DEM with multiscale analysis 基于多尺度CFD-DEM的碳纳米管流化床阻力模型机理分析

IF 4.3 2区材料科学

Particuology Pub Date : 2026-01-01 Epub Date: 2025-11-26 DOI: 10.1016/j.partic.2025.11.011

Chenyu Gao , Xijun Zhang , Peng Wang , Yan Li , Dianming Chu , Wenjuan Bai , Yan He

{"title":"Mechanistic analysis of drag force model for carbon nanotube fluidized bed based on CFD-DEM with multiscale analysis","authors":"Chenyu Gao , Xijun Zhang , Peng Wang , Yan Li , Dianming Chu , Wenjuan Bai , Yan He","doi":"10.1016/j.partic.2025.11.011","DOIUrl":"10.1016/j.partic.2025.11.011","url":null,"abstract":"<div><div>This study investigates the fluidization of aggregative carbon nanotubes (CNTs) by integrating the computational fluid dynamics-discrete element method (CFD-DEM) with a novel multiscale analysis framework. Systematic comparisons with high-speed imaging experiments reveal that Gidaspow model's piecewise formulation delivers optimal simulation performance in the dense-dilute transition zone, but it overestimates the stable fluidization pressure drop by 19.7 % due to the Ergun equation's overprediction of viscous dissipation. Furthermore, multiscale analysis demonstrates that system-averaged particle energy (kinetic, gravitational potential, and rotational energy) nonlinearly modulates reactor-scale fluidization uniformity (R<sup>2</sup>=0.6901–0.8570). This paper elucidates the underlying mechanisms behind the discrepancies in simulation results among various traditional drag models, thereby providing mechanistic insights and data-driven guidance for model selection in laboratory-scale simulations of particle fluidization.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"108 ","pages":"Pages 25-40"},"PeriodicalIF":4.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145658401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0