Particuology最新文献

An improved particle neighbor search algorithm with multi-level cache optimization strategy for discrete element method using GPU 基于GPU的离散元法多级缓存优化改进粒子邻居搜索算法

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-26 DOI: 10.1016/j.partic.2025.09.013

Hongze Li , Chun Feng , Jili Feng

{"title":"An improved particle neighbor search algorithm with multi-level cache optimization strategy for discrete element method using GPU","authors":"Hongze Li , Chun Feng , Jili Feng","doi":"10.1016/j.partic.2025.09.013","DOIUrl":"10.1016/j.partic.2025.09.013","url":null,"abstract":"<div><div>This paper proposes an improved particle neighbor search algorithm, focusing on optimizing computational efficiency and memory usage in large-scale particle system simulations. By partitioning the simulation space into grids and combining it with Morton encoding, it ensures that adjacent grids are stored contiguously in memory, thereby enhancing the locality of data access and reducing the probability of cache misses. In the particle sorting phase, Morton encoding is used to rearrange the particles, further enhancing memory continuity and leveraging the hardware cache's prefetching mechanism to reduce data read latency. The algorithm also incorporates the idea of the Verlet table method by setting a sorting threshold to optimize the sorting process, avoiding redundant calculations and unnecessary sorting operations. Through the above optimization methods, a multi-level cache optimization strategy is achieved, significantly improving the algorithm's performance and memory utilization efficiency. Experimental results show that the algorithm proposed in this paper has significant advantages in large-scale particle simulations.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"107 ","pages":"Pages 1-10"},"PeriodicalIF":4.3,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204465","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

A novel regime map for twin-screw melt granulation: Unveiling new insights into key operating variables 双螺杆熔体造粒的新制度图：揭示对关键操作变量的新见解

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-25 DOI: 10.1016/j.partic.2025.09.012

Jacquelina C. Lobos de Ponga , Marcos Díaz Muñoz , Ivana M. Cotabarren , Juliana Piña

引用次数: 0

Characteristics of mass transfer between bubble and emulsion phases of high-temperature gas–solid bubbling fluidized beds 高温气固鼓泡流化床泡相与乳相传质特性

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-25 DOI: 10.1016/j.partic.2025.09.014

Jinchao Xie , Han Gao , Qingjin Zhang , Jinliang Chen , Zezhong Wang , Chenxi Zhang , Dingrong Bai

{"title":"Characteristics of mass transfer between bubble and emulsion phases of high-temperature gas–solid bubbling fluidized beds","authors":"Jinchao Xie , Han Gao , Qingjin Zhang , Jinliang Chen , Zezhong Wang , Chenxi Zhang , Dingrong Bai","doi":"10.1016/j.partic.2025.09.014","DOIUrl":"10.1016/j.partic.2025.09.014","url":null,"abstract":"<div><div>Understanding interphase mass transfer is crucial for the efficient design and operation of gas–solid fluidized beds, which are widely used in various industrial processes. However, research on mass transfer behavior in such systems, particularly at high temperatures (e.g., >1000 °C), remains sparse. This study, dedicated to Profs. Yong Jin and Zhiqing Yu's contributions to fluidization, elucidates the mass transfer behavior of gas-solid bubbling fluidized beds at temperatures up to 1600 °C by modeling gas residence time distribution data using a two-phase model. We examine the effects of temperature, gas velocity, bed height, and particle size on mass transfer characteristics. The results reveal that the mass transfer flux increases with temperature up to 800 °C, peaking within this range before stabilizing above 1200 °C. This trend is closely linked to the behavior of bubble dynamics, where bubble size initially decreases significantly as temperature rises, eventually reaching a plateau at higher temperatures. Experimental pressure fluctuation analysis validates this behavior, further supporting the observed temperature effects on bubble dynamics. Higher gas velocity reduces the mass transfer flux and mitigates back-mixing, while bed height and particle size affect bubble dynamics in a nonlinear manner. Experimental validation confirms the potential of these findings for optimizing the design and operation of high-temperature bubbling fluidized bed reactors.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"107 ","pages":"Pages 26-34"},"PeriodicalIF":4.3,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227700","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 study of solid−liquid mixing in a novel pulsed precipitation reactor based on DEM–VOF simulation 基于DEM-VOF模拟的新型脉冲沉淀反应器固液混合流体动力学研究

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-20 DOI: 10.1016/j.partic.2025.09.010

Xin Huang , Dehui Wu , Zongtai Wang , Yunhai Huang , Ting Wang , Na Wang , Jing Ma , Hongxun Hao

{"title":"Hydrodynamics study of solid−liquid mixing in a novel pulsed precipitation reactor based on DEM–VOF simulation","authors":"Xin Huang , Dehui Wu , Zongtai Wang , Yunhai Huang , Ting Wang , Na Wang , Jing Ma , Hongxun Hao","doi":"10.1016/j.partic.2025.09.010","DOIUrl":"10.1016/j.partic.2025.09.010","url":null,"abstract":"<div><div>Efficient and reliable precipitation reactors are of great significance for the recovery of spent nuclear fuel. However, most current spent nuclear fuel precipitation reactors rely on agitation-driven mixing, which suffers from low mixing efficiency and high failure rates. In this study, a pulse pressure-driven spent nuclear fuel precipitation reactor was designed and its hydrodynamics performance were investigated using a CFD–DEM–VOF coupled numerical approach. Three key process parameters were systematically examined, including pulse period, pulse pressure, and initial liquid level. The simulation results revealed that pulse period and pulse pressure significantly influenced hydrodynamic behavior and particle suspension performance, whereas the initial liquid level had a subordinate effect. Under optimized pulse conditions, effective mixing and uniform particle suspension could be achieved regardless of the initial liquid height. Furthermore, a quantitative evaluation of mixing and suspension performance was conducted based on average flow velocity, average turbulent kinetic energy, and the relative standard deviation of particle suspension uniformity. The results demonstrated that efficient fluid mixing and homogeneous particle suspension could be realized under appropriate operating conditions. This study provides theoretical guidance for developing high-performance pulse-driven precipitation reactors and optimizing their operational processes in spent nuclear fuel treatment.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"106 ","pages":"Pages 305-319"},"PeriodicalIF":4.3,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155341","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

Marine inspired design of soil rippers using ship bulbous bow geometries: A cross-disciplinary approach with DEM simulation insights 利用船首球形几何形状的海洋启发设计的土壤撕裂器：具有DEM模拟见解的跨学科方法

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-20 DOI: 10.1016/j.partic.2025.09.011

Egidijus Katinas , Regita Bendikienė , Antanas Čiuplys , Rostislav Chotěborský , Monika Hromasová , Barbora Kuřetová

{"title":"Marine inspired design of soil rippers using ship bulbous bow geometries: A cross-disciplinary approach with DEM simulation insights","authors":"Egidijus Katinas , Regita Bendikienė , Antanas Čiuplys , Rostislav Chotěborský , Monika Hromasová , Barbora Kuřetová","doi":"10.1016/j.partic.2025.09.011","DOIUrl":"10.1016/j.partic.2025.09.011","url":null,"abstract":"<div><div>Over the past decades, scientists have studied tillage and soil processing technologies based on the classical shapes of agricultural tools. Numerous studies highlight the importance of agricultural tool longevity in relation to abrasive wear resistance and draught force values. However, these studies are typically limited to the most common shapes and types of tools. This paper combines the insights gained from the marine industry's experience in the design of ship's bulbous bows with the challenges of designing soil rippers for agricultural machinery. New shape elements were developed based on the delta, oval, and nabla types of bulbous bows used in ships. Thirteen types of designed elements, along with the original shape, were tested virtually using the Discrete Element Method (DEM). The 3D-printed samples were then tested in a sand bin to measure draught force. DEM simulation parameters were validated by measuring the Static Angle of Repose (SAOR) of sand. The results of this study demonstrate that applying a bulbous bow-inspired shape to the soil ripper can reduce draught force by 7.1 %; however, in some cases, it can also increase the force by 4.1 % compared to the original shape. The values are giving statistically significant differences between the experimental measurements. To fully evaluate the application of these designed elements, further soil disturbance and wear analysis studies should be conducted in future research.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"106 ","pages":"Pages 291-304"},"PeriodicalIF":4.3,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155340","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

Acoustic agglomeration for fire smoke control: A state-of-the-art review 火灾烟气控制的声学聚块：最新进展

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-18 DOI: 10.1016/j.partic.2025.09.009

Guangxue Zhang, Ziyue Chen, Sirui Tong, Dingkun Yuan, Yunchao Li, Jiangrong Xu

{"title":"Acoustic agglomeration for fire smoke control: A state-of-the-art review","authors":"Guangxue Zhang, Ziyue Chen, Sirui Tong, Dingkun Yuan, Yunchao Li, Jiangrong Xu","doi":"10.1016/j.partic.2025.09.009","DOIUrl":"10.1016/j.partic.2025.09.009","url":null,"abstract":"<div><div>The increasing complexity of urban buildings has significantly heightened fire risks, posing serious threats to public safety. In the event of a fire, smoke particles scatter and absorb light, drastically reducing visibility and greatly endangering trapped individuals. Existing smoke control methods face notable limitations. Natural ventilation is susceptible to environmental conditions. Solid obstructions such as firewalls can impede evacuation. Fine water mist may remain suspended in air and reduce visibility. Moreover, these approaches do not directly control smoke particles, so there is a need for innovative solutions. Acoustic agglomeration, which leverages high-intensity acoustic fields to induce relative motion among smoke particles and facilitate rapid agglomeration, is a promising technology for improving visibility in smoke-filled environments. It operates independently of ambient conditions, does not require solid barriers, and introduces no additional particles, which underscores its advantages for evacuation and rescue. This review synthesizes the development, mechanisms, operating parameters, sound sources, and hybrid strategies of acoustic agglomeration for fire smoke control, identifies remaining gaps, and assesses feasibility. The insights are intended to support researchers and decision-makers in advancing more effective smoke control strategies.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"106 ","pages":"Pages 261-274"},"PeriodicalIF":4.3,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155338","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

CFD-DEM-SPM modeling of permeability and pressure drop in cohesive zones of heterogeneous alternating layer beds for low-carbon blast furnace ironmaking 低碳高炉炼铁非均质交变层床黏结带渗透率和压降的CFD-DEM-SPM模型

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-18 DOI: 10.1016/j.partic.2025.09.008

Qiang Li , Yu Jiang , Jiayun Dan , Suwei Ma

{"title":"CFD-DEM-SPM modeling of permeability and pressure drop in cohesive zones of heterogeneous alternating layer beds for low-carbon blast furnace ironmaking","authors":"Qiang Li , Yu Jiang , Jiayun Dan , Suwei Ma","doi":"10.1016/j.partic.2025.09.008","DOIUrl":"10.1016/j.partic.2025.09.008","url":null,"abstract":"<div><div>To reduce greenhouse gas emissions in ironmaking, the steel industry is advancing innovative low-carbon blast furnace (BF) technologies. A critical challenge for implementing such innovations lies in optimizing permeability within the BF's cohesive zone (CZ), which directly impacts operational stability and efficiency. This study employs a coupled computational fluid dynamics-discrete element method (CFD-DEM) to calibrate Young's modulus by respectively fitting the relationship between Young's modulus and temperature, as well as pressure drop, based on a reported lab-scale softening and smelting experimental data of ore-coke heterogeneous alternating layer packed beds resembling BFs, and develops a softening particle model (SPM). The SPM establishes a temperature-dependent relationship between mechanical properties of softened ore particles and CZ conditions in industrial-scale BFs. Simulations of particle shrinkage behavior and pressure drop trends using the CFD-DEM-SPM framework demonstrate strong correlation with experimental data, validating its accuracy for predictive analysis. Furthermore, this study investigates how layer arrangement configurations, size ratios between ore and coke particles, and coke blending proportions influence CZ characteristics. Key findings identify an optimal batch weight configuration to enhance permeability within the CZ while maintaining operational stability. Additionally, results indicate that increasing the relative particle size of ore compared to coke or enhancing the proportion of blended coke in burden mixes improves CZ permeability, offering actionable strategies for reducing carbon intensity in BF operations. These insights provide critical guidance toward developing low-carbon BF processes compatible with global climate targets.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"106 ","pages":"Pages 320-335"},"PeriodicalIF":4.3,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217380","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

A drag model containing compressibility, rarefaction and temperature ratio effects based on genetic algorithm fitting 基于遗传算法拟合的包含可压缩性、稀薄性和温度比效应的阻力模型

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-16 DOI: 10.1016/j.partic.2025.09.007

Lite Zhang , Sifan Wu , Yang Feng , Xiangbo Meng , Heng Zhang , Haozhe Jin , Genfu Xu

引用次数: 0

Numerical simulation study of slag discharge process driven by pressure difference in a supercritical water fluidized bed 超临界水流化床压差驱动排渣过程的数值模拟研究

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-13 DOI: 10.1016/j.partic.2025.09.006

Yu Wang, Fanrui Meng, Hui Jin, Liejin Guo

{"title":"Numerical simulation study of slag discharge process driven by pressure difference in a supercritical water fluidized bed","authors":"Yu Wang, Fanrui Meng, Hui Jin, Liejin Guo","doi":"10.1016/j.partic.2025.09.006","DOIUrl":"10.1016/j.partic.2025.09.006","url":null,"abstract":"<div><div>The simulation of the slag discharging process in supercritical water (SCW) fluidized beds is challenging due to the complexity of particle transport in a high-temperature and high-pressure environments. To balance computational efficiency with the need for detailed particle-level information, this study proposes a dynamic three-dimensional numerical model based on computational particle fluid dynamics (CPFD) to investigate the slag discharge process in a SCW fluidized bed reactor. This study presents the dynamic evolution of the flow field, velocity field, and particle phase volume fraction distribution during the slag discharge process, revealing the relationship between the uneven particle distribution and the flow field. Large particles are difficult to be discharged from the bottom of the reactor during the slag discharge process. By increasing the discharging time, the problem of dead zone at the bottom of the reactor can be alleviated effectively. Higher particle velocities and more frequent particle impacts cause more severe wear on the wall near the slag discharge outlet. Reducing the slag discharge differential pressure helps to reduce the wear of the connection. Throughout the entire slag discharge process, the solid holdup remains above 90 %, demonstrating the efficiency and rapidity of the slag discharge system. This work aims to provide valuable insights for the design and optimization of slag discharge systems.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"106 ","pages":"Pages 275-290"},"PeriodicalIF":4.3,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155339","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

Dynamic cell size method for high-efficiency simulation of particle breakage 高效模拟颗粒破碎的动态胞体尺寸法

IF 4.3 2区材料科学

Particuology Pub Date : 2025-09-12 DOI: 10.1016/j.partic.2025.09.004

Fulei Chen, Hui Yuan, Zihan Liu, Yongzhi Zhao

{"title":"Dynamic cell size method for high-efficiency simulation of particle breakage","authors":"Fulei Chen, Hui Yuan, Zihan Liu, Yongzhi Zhao","doi":"10.1016/j.partic.2025.09.004","DOIUrl":"10.1016/j.partic.2025.09.004","url":null,"abstract":"<div><div>The discrete element method (DEM) has become a powerful tool to investigate the breakage process, which has drawn increasing attention in recent years. The process of particle breakage can be regarded as the reduction of the particle size, which results in the explosive growth of particle number, making the computation inefficient. Contact detection is a major process in DEM simulation. The cell size is a crucial parameter for contact detection and has a great influence on computational efficiency. The static cell size method is usually employed, and the size will be set before the simulation according to the particle size. Since the particle size changes during the breakage simulation, the static cell size method is no longer proper. As a result, a dynamic cell size method is proposed in this study. Two parameters are critical in this method that are key to the computational efficiency, including the number of neighbor particles retrieved for a specific particle (<em>N</em><sub><em>p</em></sub>) and the number of search cells retrieved during the process of finding all neighbor particles (<em>N</em><sub><em>c</em></sub>). By integrating this new method, the cell size is supposed to be adjusted according to the ratio of <em>N</em><sub><em>p</em></sub> to <em>N</em><sub><em>c</em></sub> to achieve a high efficiency of contact detection. By comparing the computational time of the same simulation case, the dynamic cell size method achieves substantial computational time reduction for equivalent simulation scenarios, and the efficiency under different cell sizes is recorded to validate the cell size in the subsequent test case.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"106 ","pages":"Pages 213-221"},"PeriodicalIF":4.3,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106659","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