Particuology最新文献

{"title":"Tabulation as a method to accelerate intraparticle models in DEM: Thermal conduction as an example","authors":"Torben Bergold,&nbsp;Enric Illana-Mahiques,&nbsp;Viktor Scherer","doi":"10.1016/j.partic.2025.06.004","DOIUrl":"10.1016/j.partic.2025.06.004","url":null,"abstract":"<div><div>Intraparticle models of thermal processes are essential in the Discrete Element Method (DEM) when particles are thermally thick. Accurately solving the intraparticle conservation equations using the finite volume method requires sufficient spatial and temporal resolution, increasing simulation cost. This short communication proposes to replace the finite volume method (FVM) by a novel tabulated model that reduces the computational effort without compromising accuracy. The look-up database is generated from a set of single-particle simulations under different boundary conditions using the FVM. To assess the capability of the tabulated model to reproduce the results of the finite volume method, another single particle case with periodic functions for the fluid temperature is simulated. Results showed that tabulation provides accurate predictions while reducing computational cost by a factor of 3–10.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 277-285"},"PeriodicalIF":4.1,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338337","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}

{"title":"Simulation of binder migration behavior and bridge network morphology in frozen sand mold additive manufacturing","authors":"Haoming Shi ,&nbsp;Zhongde Shan ,&nbsp;Haoqin Yang ,&nbsp;Dandan Yan ,&nbsp;Weifei Song","doi":"10.1016/j.partic.2025.06.005","DOIUrl":"10.1016/j.partic.2025.06.005","url":null,"abstract":"<div><div>Frozen sand mold additive manufacturing is a new process that utilizes water-based binder phase transition freezing in a low-temperature environment to create sand molds. The aim is to reduce resin binder pollution. However, binder migration and phase transition behavior require further investigation. This study uses CFD method to numerically simulate the droplet size, injection frequency, and environmental temperature in the migration behavior of water-based binder. The results show that changes in process parameters lead to alterations in the binder migration path, which in turn affects the structure of the binder bridge network. The pore throat guides binder migration, leading to a higher concentration of binder near the sand layer surface. At 268 K, the freezing rate of the binder is much faster than the migration rate of the binder during the slow development stage, significantly affecting the migration behavior of the binder and the binder bridge network structure.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 286-300"},"PeriodicalIF":4.1,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331334","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}

{"title":"Redox processes on the lunar surface: Current status and progress","authors":"Xi Wang ,&nbsp;Zhi Cao ,&nbsp;Chen Li ,&nbsp;Zhenhao Hu ,&nbsp;Rui Li ,&nbsp;Yang Li ,&nbsp;Bingkui Miao","doi":"10.1016/j.partic.2025.06.003","DOIUrl":"10.1016/j.partic.2025.06.003","url":null,"abstract":"<div><div>The lunar regolith records signatures of material‒energy interactions with both the solar system and beyond. Traditional space weathering processes, based on laboratory analyses and remote-sensing data, emphasize a reduction-dominated paradigm in which nanophase metallic iron (np-Fe⁰) formation and spectral reddening are primarily driven by micrometeorite impacts and solar wind irradiation. However, emerging evidence of complex oxidation processes, including impact-generated magnetite, disproportionation reactions, and oxidation signatures potentially induced by Earth's magnetotail, challenges this conventional view. These conflicting evolutionary signatures indicate that existing models may fail to capture the full spectrum of oxidation and reduction pathways involved in lunar space weathering. Integrating laboratory analyses and remote-sensing data, we here construct a multi-scale redox dynamics framework that elucidates three critical reaction processes: vapor deposition, in situ reduction, and self-redox reactions. This framework reveals a spatiotemporal decoupling between globally sustained reduction and localized, episodic oxidation events. This review provides key constraints for understanding the complex lunar surface evolution mechanisms and long-term evolution of airless planetary bodies.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 267-276"},"PeriodicalIF":4.1,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313957","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}

{"title":"Corrigendum to “Study of hydraulic transport characteristics and erosion wear of twisted four-lobed pipe based on CFD-DEM” [Particuology 95 (2024) 356–369]","authors":"Chunya Sun ,&nbsp;Zhifang Xu ,&nbsp;Yanqiu Xiao ,&nbsp;Guangzhen Cui ,&nbsp;Zhengdong Xiao ,&nbsp;Wanbin Cui ,&nbsp;Pengpeng Wang ,&nbsp;Lianhui Jia","doi":"10.1016/j.partic.2025.05.010","DOIUrl":"10.1016/j.partic.2025.05.010","url":null,"abstract":"","PeriodicalId":401,"journal":{"name":"Particuology","volume":"102 ","pages":"Pages 275-276"},"PeriodicalIF":4.1,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263681","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}

{"title":"A generalized memory effect in fluid/flame dynamics due to unsteady events","authors":"Cheng Chi ,&nbsp;Zhisong Ou ,&nbsp;Chunkan Yu ,&nbsp;Wang Han ,&nbsp;Dominique Thévenin","doi":"10.1016/j.partic.2025.05.021","DOIUrl":"10.1016/j.partic.2025.05.021","url":null,"abstract":"<div><div>Though being an important mechanism in systems involving unsteady fluid flows (e.g., fluids interacting with moving structures, particles in turbulent flows, turbulent flame propagation), the memory effect is usually not considered and has not attracted much attention. The present study tries to highlight the importance of this memory effect based on a variety of examples. In this manner, the three key components characterizing the memory effect can be identified in a general manner. The central mechanism controlling the memory effect is then investigated by studying the flow over a shrinking particle. It is found that the Damköhler number comparing the timescales of the unsteady (trigger) event and of the feedback on the flow directly determines the intensity of the memory effect; a smaller Damköhler number results in a more intense effect. Finally, the flow induced by a flapping wing is considered to demonstrate that the memory effect could be also beneficial for practical applications, for instance for biomimetic locomotion.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 232-241"},"PeriodicalIF":4.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144252909","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}

{"title":"A resolved LBM-DEM coupling method for fluid-solid interaction of non-spherical particles based on the super-ellipsoid model","authors":"Chao Xu ,&nbsp;Xiang Li ,&nbsp;Zihan Liu ,&nbsp;Du Zhou ,&nbsp;Zhixiong Wang ,&nbsp;Likuan Chen ,&nbsp;Jian Yang ,&nbsp;Lianyong Zhou ,&nbsp;Yongzhi Zhao","doi":"10.1016/j.partic.2025.05.023","DOIUrl":"10.1016/j.partic.2025.05.023","url":null,"abstract":"<div><div>This paper introduces a resolved coupling method based on the LBM (Lattice Boltzmann Method and DEM (Discrete Element Method) for simulating fluid-particle interactions involving non-spherical particles. The super-ellipsoid model is applied so that a wide range of particle shapes can be represented with high accuracy and efficiency, enabling a detailed investigation of shape effects on flow behavior. The proposed method is validated by comparing simulation results with experimental data on the sedimentation of both spherical and non-spherical particles. Then a fluidized bed system containing different kinds of non-spherical particles is studied and the influence of particle shape on the flow field is investigated. The result further confirms the accuracy and robustness of this method in complex multiphase flow systems. Compared to existing LBM-DEM coupling approaches, this study is more accurate and efficient for simulating flow fields involving particles with smooth surfaces, offering a powerful tool for the study of multiphase systems with regular non-spherical particles.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 252-266"},"PeriodicalIF":4.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279418","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}

{"title":"Design and performance evaluation of a paint particle dispersion reduction device for airless spraying","authors":"Jin-Han Park,&nbsp;Han-Joon Kim,&nbsp;Se-Jin Yook","doi":"10.1016/j.partic.2025.05.022","DOIUrl":"10.1016/j.partic.2025.05.022","url":null,"abstract":"<div><div>Airless spray painting, widely adopted for its efficiency and cost-effectiveness, generates a significant amount of airborne paint particles that contribute to air pollution and pose health risks to workers and nearby residents. In this study, a paint particle dispersion reduction device (PPDRD) utilizing an axial cyclone separator and a high efficiency particulate air (HEPA) filter was designed and evaluated to minimize the dispersion of paint particles during airless spray applications. The cyclone separator captured larger paint particles through centrifugal force, while the HEPA filter effectively removed smaller particles that escaped the cyclone separator. Computational fluid dynamics (CFD) simulations were conducted to optimize key design parameters, including the number and height of guide vanes and suction flow rate. Lab-scale and field experiments demonstrated that the PPDRD significantly reduced airborne paint particles, with respirable particles (4 μm or smaller) decreasing by 50–80 % depending on particle size, while maintaining coating quality. These findings indicate that the PPDRD effectively mitigates the inhalation risks associated with hazardous paint aerosols, providing a practical solution for improving workplace safety and environmental compliance. This technology is expected to be widely applicable in exterior building painting, shipbuilding, and the automotive industry.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 242-251"},"PeriodicalIF":4.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144262470","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}

{"title":"Influence of sand size on motion and transport characteristics of wind-sand two-phase flow in desert environments","authors":"Xueqing Liu ,&nbsp;Zhengming Yi ,&nbsp;Jianlan Li ,&nbsp;Luyi Lu ,&nbsp;Linqiang Cui ,&nbsp;Qi Tao","doi":"10.1016/j.partic.2025.05.019","DOIUrl":"10.1016/j.partic.2025.05.019","url":null,"abstract":"<div><div>The influence of sand size on motion and transport characteristics of wind-sand two-phase flow is a crucial theoretical foundation for addressing global desertification issues. This study conducts a detailed investigation into the influence of sand size on air flow characteristics, sand motion behaviors, and transport distributions in the wind-sand two-phase flow using TFM method. The results indicate that the existence of sand particles decreases the air velocity, widens the air dynamic range and intensifies the momentum transfer process. When the sand size increases from 10 to 400 μm, the dynamic height and maximum turbulent kinetic energy decrease by 79.3 % and 82.1 %, respectively. The initial saltation velocities in the horizontal and vertical directions are predominantly distributed within the ranges of −0.1 to 0.7 m/s and 0–0.6 m/s, respectively. The initial horizontal and vertical saltation velocities corresponding to the peak proportion increase with decreasing sand size. The horizontal and vertical distributions of sediment transport flux conform to the exponential decline law, reflecting the magnitude, distribution and extent of sand transportation into the desert flow field. When the sand diameter rises from 100 to 400 μm, the maximum values of sediment transport flux in vertical and horizontal directions increase by 1.83 times and 1.01 times, respectively, while the transport indexes decrease by 5.6 % and 10.3 %, respectively. The variation characteristics of sediment transport range differ between low and high air friction velocities as sand size increases. These research findings provide important theoretical guidance for the control of desertification.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 104-116"},"PeriodicalIF":4.1,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222504","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}

{"title":"Experimental and DFT simulation of collective dissolution of anode/cathode of Li−ion batteries using a ChCl−PTSA deep eutectic solvent","authors":"Saeid Karimi ,&nbsp;Bahram Behnajady","doi":"10.1016/j.partic.2025.05.020","DOIUrl":"10.1016/j.partic.2025.05.020","url":null,"abstract":"<div><div>In this study, the cumulative dissolution of the anode and cathode (A/C) mixture of Li-ion batteries (LIBs) in a deep eutectic solvent (DES) composed of choline chloride (ChCl) and p-toluenesulfonic acid (PTSA) was evaluated within a temperature range of 40–100 °C and a time range of 20–1440 min. The results showed that Ni, Co, Li, Mn, and Cu metals dissolved with over 90 % efficiency at 100 °C and 1440 min, while Al dissolved at only about 26 % under the same conditions. XRD and SEM-EDS analyses confirmed these findings, with minimum residual compounds of Ni, Co, Li, Mn, or Cu detected. FTIR confirmed ChCl−PTSA DES formation and its after-leaching stability, allowing reuse with minimal changes for sustainable metal recovery. The ChCl–PTSA DES exhibits a symmetric σ−profile (centered at σ = 0 ± 0.2 e/Ų), COSMO-identified nucleophilic/electrophilic regions (+0.214 to −0.158 e/Ų), and Mulliken charges (O: −0.47 to −0.65, Cl: −0.39, H: +0.06 to 0.15). These density functional theory (DFT) simulations highlight charge complementarity, stabilizing the eutectic structure via sulfonic oxygen, chloride, and ammonium group interactions. According to DFT simulation for pure and containing metal ions DES, the ChCl−PTSA exhibits a 3.87 eV HOMO−LUMO gap, enabling efficient metal leaching. Co(II) (2.29 eV gap) and Mn(II) (0.56 eV) show higher stability than higher oxidation states, while Li(I) widens the gap (3.97 eV), enhancing stability. DFT simulations reveal distinct COSMO surface charge distributions for metal ions in ChCl–PTSA, categorized as: (1) highly polarized (Co(II): +0.3253 to −0.2158 e/Ų; Mn(II): +0.3769 to −0.2496 e/Ų), exhibiting strong charge separation and high reactivity; (2) moderately polarized (Ni(II): +0.2240 to −0.2061 e/Ų; Al(III): +0.2547 to −0.2192 e/Ų), balancing reactivity and stability; and (3) minimally perturbed (Li(I): +0.2485 to −0.1861 e/Ų; Cu(I): +0.3233 to −0.1876 e/Ų), showing stable charge delocalization.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 217-231"},"PeriodicalIF":4.1,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144252908","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}

{"title":"Steam cracking of polypropylene for the production of light olefins in a fountain confined conical spouted bed reactor","authors":"Manomita Mollick ,&nbsp;Laura Santamaria ,&nbsp;Ziliang Wang ,&nbsp;Pablo Comendador ,&nbsp;Maite Artetxe ,&nbsp;Enara Fernandez ,&nbsp;Martin Olazar ,&nbsp;Gartzen Lopez","doi":"10.1016/j.partic.2025.05.018","DOIUrl":"10.1016/j.partic.2025.05.018","url":null,"abstract":"<div><div>This paper presents an alternative approach for plastic waste valorization in a fountain confined conical spouted bed reactor. The study evaluates the application of an upgraded spouted bed design for the steam cracking of polypropylene (PP) at 750 °C, focusing on high value added products. The highly efficient cracking process results in a high gas yield of 80.9 wt%. This stream is composed of H₂, CO, CO₂, C₁-C₄ paraffins and C₂-C₄ olefins, with the latter reaching a total yield of 49.2 wt%. Among the light olefins, propylene (21.8 wt%) and ethylene (16.5 wt%) are the most relevant. Interestingly, a remarkable yield of the valuable BTX fraction was obtained, 14.0 wt%, with benzene being the predominant compound. The reactor configuration and excellent control of process conditions enhanced light olefins yield by β-scission and radical mechanism, promoting the formation of light hydrocarbons, as well as minimizing secondary oligomerization and reforming reactions. This study is a proof of the viability of steam cracking in a fountain confined spouted bed reactor for converting PP into valuable chemical intermediates, as well as the viability of this technology for industrial application in waste plastic valorization.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 206-216"},"PeriodicalIF":4.1,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240197","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}