Powder Technology最新文献

Unveiling precision and limitations in submicron particle size analysis methods: EM, LD, and DLS 揭示亚微米粒度分析方法的精度和局限性：EM， LD和DLS

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-09 DOI: 10.1016/j.powtec.2025.121694

Haruhisa Kato, Ayako Nakamura, Shinichi Kinugasa

{"title":"Unveiling precision and limitations in submicron particle size analysis methods: EM, LD, and DLS","authors":"Haruhisa Kato, Ayako Nakamura, Shinichi Kinugasa","doi":"10.1016/j.powtec.2025.121694","DOIUrl":"10.1016/j.powtec.2025.121694","url":null,"abstract":"<div><div>Accurate characterization of submicron particles in the range of 100 to 1000 nm is essential in industrial, biomedical, and environmental applications because particle size strongly affects physicochemical behavior and biological responses. This study systematically evaluated three widely used sizing techniques, electron microscopy (EM), laser diffraction (LD), and dynamic light scattering (DLS), using well characterized monomodal and bimodal polystyrene latex (PSL) reference materials. Reference values were established and an interlaboratory comparison assessed trueness and precision, where trueness reflects closeness to reference values and precision indicates variability among analysts. For monomodal PSLs, all techniques provided highly accurate and precise diameters. Mixed PSL samples exhibited greater variability, particularly in LD, while EM and DLS at backscattering angles yielded values closer to the reference. These results highlight that method selection and instrument configuration significantly influence submicron particle sizing and emphasize the importance of carefully considering measurement conditions for reliable characterization.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121694"},"PeriodicalIF":4.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heterogeneity detection of void structure in discrete particle assemblies: Case-based analysis on asphalt mixtures utilizing digital image processing 离散颗粒组合中空隙结构的非均质性检测：基于案例的沥青混合料数字图像处理分析

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-09 DOI: 10.1016/j.powtec.2025.121738

Zhibin Ren , Yiqiu Tan , Chao Xing , Lei Zhang , Lan Huang , Anxin Meng , Xing Liu

{"title":"Heterogeneity detection of void structure in discrete particle assemblies: Case-based analysis on asphalt mixtures utilizing digital image processing","authors":"Zhibin Ren , Yiqiu Tan , Chao Xing , Lei Zhang , Lan Huang , Anxin Meng , Xing Liu","doi":"10.1016/j.powtec.2025.121738","DOIUrl":"10.1016/j.powtec.2025.121738","url":null,"abstract":"<div><div>Discrete Particle Assemblies (DPAs), such as Hot Mix Asphalt (HMA), display notable performance variability, often driven by internal void structure heterogeneity. This study aims to develop a practical and applicable framework for quantifying and analyzing structural heterogeneity in HMA voids. To this end, high-resolution 3D digital image processing was employed to extract and reconstruct void structures from a randomized asphalt mixture database. Subsequently, void morphology, spatial distribution, and volumetric classification are quantified using statistical, fractal, and multifractal descriptors. Parameters such as void ratio, Homogeneity Index, and Shape Index are used to characterize global and local heterogeneity, while multifractal spectrum metrics provide deeper insight into geometric complexity. Finally, the correlation between particle interference and structural heterogeneity was analyzed. The results confirm that the void structure exhibits significant heterogeneity. Specifically, the coefficient of variation for Statistical Descriptors can reach about 30 %, and the proportion of outliers can be as high as 7 %. For Fractal Geometry-Based Descriptors, these values are even larger. Furthermore, particle interference was found to greatly increase void heterogeneity by altering void shape. Therefore, controlling particle skeleton features can serve as an effective way to regulate void structure heterogeneity, providing theoretical support for improving the engineering reliability of granular materials.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121738"},"PeriodicalIF":4.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discrete numerical analysis of cohesive granular flow in a thin rotating drum: Flow regimes and cohesion estimation 薄转鼓内粘性颗粒流动的离散数值分析：流动形式和粘性估计

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-09 DOI: 10.1016/j.powtec.2025.121723

Riccardo Artoni , Benoît Jabaud , Antonio Pol , Patrick Richard , Erwan Le Menn , Gabriel Tobie

{"title":"Discrete numerical analysis of cohesive granular flow in a thin rotating drum: Flow regimes and cohesion estimation","authors":"Riccardo Artoni , Benoît Jabaud , Antonio Pol , Patrick Richard , Erwan Le Menn , Gabriel Tobie","doi":"10.1016/j.powtec.2025.121723","DOIUrl":"10.1016/j.powtec.2025.121723","url":null,"abstract":"<div><div>In this study, we investigate the rheological behavior of cohesive granular flows within a rotating drum geometry using discrete element method (DEM) simulations. By systematically varying particle size, cohesion, and stiffness, we identify the emergence of distinct flow regimes—consistent with prior experimental observations. While the transitions between these regimes are primarily governed by cohesion, particle stiffness is also shown to significantly influence flow dynamics.</div><div>To interpret the numerical results, we employ a dimensional analysis rooted in the physics of adhesive particle collisions. This analysis provides a conceptual framework for the remainder of the paper, which explores how “upscaled” discrete simulations can replicate experimental findings and help infer interparticle contact properties such as the adhesive surface energy. Notably, we use it to examine rotating drum experiments involving a unique class of granular materials, ice powders, which holds particular relevance in planetary science applications, and which flowability was shown to be strongly temperature-dependent.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121723"},"PeriodicalIF":4.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the defect formation during laser powder bed fusion of high-fraction SiC particle reinforced AlMgScZr composites 高分数SiC颗粒增强AlMgScZr复合材料激光粉末床熔合过程中缺陷的形成

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-08 DOI: 10.1016/j.powtec.2025.121740

Long Geng , Xuntao Xiong , Yongxia Wang , Zhe Feng , Yuguang Chen , Wei Fan , Hua Tan , Fengying Zhang , Xin Lin

{"title":"On the defect formation during laser powder bed fusion of high-fraction SiC particle reinforced AlMgScZr composites","authors":"Long Geng , Xuntao Xiong , Yongxia Wang , Zhe Feng , Yuguang Chen , Wei Fan , Hua Tan , Fengying Zhang , Xin Lin","doi":"10.1016/j.powtec.2025.121740","DOIUrl":"10.1016/j.powtec.2025.121740","url":null,"abstract":"<div><div>Laser powder bed fusion (LPBF) of SiC particle-reinforced aluminum matrix composites (PAMCs) is extensively utilized in aerospace and electronic device fields. High-fraction SiC-PAMCs exhibit superior intrinsic properties, but their mechanical performance is significantly compromised by defect formation. This study investigates the effect of SiC on the powder spreading behavior, melt pool characteristics, and defect formation during the LPBF of SiC/AlMgScZr composites. The results reveal a strong negative correlation exists between SiC fraction and the achievable relative density of the composites. Specifically, low-fraction SiC-PAMCs (≤2 wt%) achieve excellent powder bed homogeneity and melt pool stability, achieving relative density exceeding 98 %. In contrast, increasing the SiC fraction to 10 wt% induces severe powder agglomeration, which promotes the formation of lack-of-fusion defects and significantly reduces the relative density. This phenomenon originates from two aspects: powder spreading and fusion. The interplay between recoater blade-pushing force, interparticle cohesion, and friction, creating alternating agglomeration and cavity zones in powder bed. During laser processing, unmelted powder and SiC particle agglomerates are present within the agglomeration zones. While elevated laser power partially penetrates agglomerates, it cannot fully counteract agglomeration-induced defects. The critical fraction of SiC is 7.17 wt% under an acceptable relative density of 98 %. To break through the critical value, we recommend changes in powder mixing techniques, powder spreading strategies, and fabrication approaches. Within the current framework, this study provides qualitative guidance for practical production and establishes the foundation for further optimization of process parameters and composite design in LPBF-fabricated high-fraction PAMCs.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121740"},"PeriodicalIF":4.6,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient combustion of low concentration methane over perovskite/BN-La: Enhanced catalytic performance and fundamental kinetic analysis 低浓度甲烷在钙钛矿/BN-La上的高效燃烧：增强的催化性能和基本动力学分析

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-08 DOI: 10.1016/j.powtec.2025.121742

Qiang Ni , Aikun Tang , Lu Xiao , Tao Cai , Leiqi Yang

{"title":"Efficient combustion of low concentration methane over perovskite/BN-La: Enhanced catalytic performance and fundamental kinetic analysis","authors":"Qiang Ni , Aikun Tang , Lu Xiao , Tao Cai , Leiqi Yang","doi":"10.1016/j.powtec.2025.121742","DOIUrl":"10.1016/j.powtec.2025.121742","url":null,"abstract":"<div><div>Catalytic combustion is an efficient method for removing low concentration methane from exhaust gases, with the key challenge being the development of highly effective catalysts. This study develops a composite powder perovskite MFC/BN using BN as a high thermal conductivity carrier and La as an additive for efficient methane combustion. This catalyst can achieve complete methane combustion at 455.7 °C, and run efficiently for over 25 h at 800 °C (methane conversion rate > 97 %). The structural and chemical characterizations (XRD, BET, SEM, and XPS) reveal an increased specific surface area (28.8 m<sup>2</sup>/g) and Mn<sup>4+</sup> species (46.31 %). The excellent thermal conductivity of BN carrier improves heat transfer while reducing catalyst aging and sintering, and its interaction with MFC decreases perovskite grain size and increases the specific surface area. La can induce the formation of more Mn<sup>4+</sup>, Fe<sup>3+</sup> and O<sub>lat</sub> species on the surface. Then, kinetic analysis demonstrates the pre-exponential factor (1.42 × 10<sup>9</sup> mol·g<sup>−1</sup>·s<sup>−1</sup>·kPa<sup>−1</sup>) and reaction activation energy (73.6 kJ/mol) in the reaction with a power function, and clarifies the relationship between the reactant and the catalyst surface. The mechanism shows that methane dehydrogenation and oxidation are rate-controlling steps, with BN and La facilitating CH<sub>4</sub> dehydrogenation to form CH<sub>3</sub>, CH<sub>2</sub>, and CHO intermediates.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121742"},"PeriodicalIF":4.6,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and theoretical quantification of in-situ crushing characteristics of irregularly-shaped particles under multi-axis pressure with X-ray micro-computed tomography (μCT) and discrete element method (DEM) 基于x射线微计算机断层扫描（μCT）和离散元法（DEM）的多轴压力下不规则颗粒原位破碎特性实验与理论量化

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-07 DOI: 10.1016/j.powtec.2025.121733

Xiangyu Wang , Daoyong Yang , Chenwei Liu , Mingzhong Li

{"title":"Experimental and theoretical quantification of in-situ crushing characteristics of irregularly-shaped particles under multi-axis pressure with X-ray micro-computed tomography (μCT) and discrete element method (DEM)","authors":"Xiangyu Wang , Daoyong Yang , Chenwei Liu , Mingzhong Li","doi":"10.1016/j.powtec.2025.121733","DOIUrl":"10.1016/j.powtec.2025.121733","url":null,"abstract":"<div><div>In this study, an integrated and robust framework has been developed to experimentally and theoretically quantify the in-situ crushing characteristics of irregularly-shaped particles under reservoir conditions. Experimentally, a multi-axis pressure loading system was customized to evaluate the in-situ crushing behaviour of packed proppants utilizing the X-ray micro-computed tomography (μCT) analysis. Based on the reconstructed CT images, the particle crushing behaviour was evaluated and analyzed, and its key parameters (e.g., failure modes, particle size distribution (PSD), and mean coordination number (CN)) were quantitatively determined. Based on force chain and fracture propagation dynamics, theoretically, the discrete element method (DEM) has been employed to generate irregularly-shaped particles and thus confirm their morphologies of the reconstructed images so as to determine the simulation parameters. Particle failure modes are found to be influenced by both particle morphology and pressure loading conditions. Stress propagates along the force chains and then extends in chain-like or networked patterns. Along these paths, the principal stress directions of individual proppants vary, resulting in diverse failure modes. The crushing process transitions from a dynamic state to a steady one, during which sub-particles generated from crushed particles are compacted under the applied load and fill the entire pore spaces. Such compaction increases the overall average CN, while higher CNs are less likely to crush the larger particles in a given system. With lateral confining stress, the internal force chain network of the packed proppants is found to be more homogeneous, leading to the strain hardening effect and significant improvement of the compressive strength.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121733"},"PeriodicalIF":4.6,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controlled fabrication of spherical HNS with Micro/Nano secondary structure for performance augmentation 微纳二级结构球形HNS的性能增强控制制备

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-07 DOI: 10.1016/j.powtec.2025.121737

Zheng Li, Bao Zhang, Min Yang, Ruixing Liu, Qian Wang, Xingquan Zhang, Changping Guo

{"title":"Controlled fabrication of spherical HNS with Micro/Nano secondary structure for performance augmentation","authors":"Zheng Li, Bao Zhang, Min Yang, Ruixing Liu, Qian Wang, Xingquan Zhang, Changping Guo","doi":"10.1016/j.powtec.2025.121737","DOIUrl":"10.1016/j.powtec.2025.121737","url":null,"abstract":"<div><div>Spherical energetic materials with micro-nano secondary structure have broad application prospects in the fields of aerospace, defense and military. In this paper, spherical HNS with micro-nano secondary structure was prepared by oil-in-oil emulsion method with Tween-80 as surfactant, dimethyl sulfoxide (DMSO) as solvent oil phase and cyclohexane as non-solvent oil phase. The effects of surfactant type and concentration, solvent-nonsolvent ratio and emulsion standing time on emulsion stability were investigated. The morphology, crystal structure and thermal decomposition properties of spherical HNS were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). The combustion performance, mechanical sensitivity and short pulse initiation performance of raw HNS and spherical HNS were tested and compared. The results showed that spherical HNS with uniform particle size and good dispersion could be obtained when Tween-80 was used as surfactant, the concentration was 5 g·L<sup>−1</sup>, the volume ratio of solvent to non-solvent was 3:3, and the standing time was less than 30 min.Compared with the raw materials, the thermal decomposition peak temperature of spherical HNS was 15.5 °C earlier, and the combustion performance was improved. The specific surface area of spherical HNS was expanded by 15 times, showing good insensitive effect and excellent short pulse detonation performance.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121737"},"PeriodicalIF":4.6,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aluminium dust explosion suppression by KHCO3 and K2CO3: The influence of the inhibitor's particle size and thermochemical synergy KHCO3和K2CO3抑制铝粉尘爆炸：抑制剂粒度和热化学协同作用的影响

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-07 DOI: 10.1016/j.powtec.2025.121732

Jianxu Ding , Yufang Chen , Xingjun Wu , Maodong Li , Xiangbao Meng , Zhiyue Han , Shihang Li , Runzhi Li , Chuyuan Huang

{"title":"Aluminium dust explosion suppression by KHCO3 and K2CO3: The influence of the inhibitor's particle size and thermochemical synergy","authors":"Jianxu Ding , Yufang Chen , Xingjun Wu , Maodong Li , Xiangbao Meng , Zhiyue Han , Shihang Li , Runzhi Li , Chuyuan Huang","doi":"10.1016/j.powtec.2025.121732","DOIUrl":"10.1016/j.powtec.2025.121732","url":null,"abstract":"<div><div>This study investigated the effects of potassium carbonate salts (KHCO<sub>3</sub> and K<sub>2</sub>CO<sub>3</sub>) on the suppression of aluminium dust explosions. The inhibitor variables mainly include the particle size, the inerting ratio, and the mixing strategy. Experiments in a 20 L spherical explosion system revealed that the maximum explosion pressure (<em>P</em><sub>max</sub>) decreased significantly with increasing inerting ratios or with decreasing inhibitor particle sizes. Adding KHCO<sub>3</sub> reduced <em>P</em><sub>max</sub> more effectively than adding K<sub>2</sub>CO<sub>3,</sub> which achieved near extinction at 70 wt%. Compared with KHCO<sub>3</sub>, a 7:3 KHCO<sub>3</sub>/K<sub>2</sub>CO<sub>3</sub> mixture at 60 wt% lowered <em>P</em><sub>max</sub> by 23 %. Thermal characteristic analyses, explosion residue analyses, and numerical modelling analyses indicated that the two inhibitors had different methods for reducing the aluminium explosion pressure. KHCO<sub>3</sub> primarily acted in the early stage of the aluminium explosion, whereas K<sub>2</sub>CO<sub>3</sub> chemically participated in oxygen radical competition. The synergistic effects of the two inhibitor mixtures were clarified. These findings highlight the critical role of optimising the particle size, inerting ratios, and hybrid formulations to maximise the suppression efficiency and economic viability.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121732"},"PeriodicalIF":4.6,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-local updated Lagrangian peridynamics model for granular flow with μ(I) rheology 具有μ(I)流变的颗粒流动非局部更新拉格朗日动力学模型

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-06 DOI: 10.1016/j.powtec.2025.121736

Changyun Yin , Jianbo Fei , Zhihao Liu , Zhankui Liu , Yuxin Jie

{"title":"Non-local updated Lagrangian peridynamics model for granular flow with μ(I) rheology","authors":"Changyun Yin , Jianbo Fei , Zhihao Liu , Zhankui Liu , Yuxin Jie","doi":"10.1016/j.powtec.2025.121736","DOIUrl":"10.1016/j.powtec.2025.121736","url":null,"abstract":"<div><div>Granular materials exhibit complex behaviors in different flow states that feature nonlocality. In this study, we propose a non-local updated Lagrangian peridynamics model for granular flow. The model treats the granular flow as a weakly compressible fluid, governed by the framework of Navier–Stokes equation and incorporating the <em>μ</em>(<em>I</em>) rheology. The introduction of peridynamics with the Wendland C<sup>2</sup> kernel function enables this nonlocal feature. The proposed model is implemented to simulate granular collapse processes. Simulated flow velocities and deposition configurations are compared with experimental observations. It is the found that the proposed peridynamics method naturally includes non-local effects through considering the non-contact interaction between material points in the peridynamics horizon, specifically, slower static-to-flowing transitions and wider shear bands can be captured compared with the local model. Sensitive analysis indicates that increasing the peridynamic horizon enhance stress redistribution, widen shear band, and extend runout. In addition, the influence of the compressibility of granular properties and the adopted kernel functions is further investigated. In general, the updated Lagrangian nonlocal peridynamics model can reproduce simultaneously the behaviors exhibited by granular materials, especially in the quasi-static regime.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121736"},"PeriodicalIF":4.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","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 investigation of the flow and heat transfer characteristic of copper slag and biomass particles in a coupled waste heat utilization system 废热耦合利用系统中铜渣与生物质颗粒流动及传热特性的CFD-DEM研究

IF 4.6 2区工程技术

Powder Technology Pub Date : 2025-10-06 DOI: 10.1016/j.powtec.2025.121713

Chaowei Ma , Jianhang Hu , Hua Wang , Cheng Tan , Yong Yu

{"title":"CFD-DEM investigation of the flow and heat transfer characteristic of copper slag and biomass particles in a coupled waste heat utilization system","authors":"Chaowei Ma , Jianhang Hu , Hua Wang , Cheng Tan , Yong Yu","doi":"10.1016/j.powtec.2025.121713","DOIUrl":"10.1016/j.powtec.2025.121713","url":null,"abstract":"<div><div>As a high-energy-consuming sector, the metallurgical industry possesses substantial untapped waste heat resources, with efficient recovery of slag heat emerging as a critical challenge. To address the limitations of conventional recovery technologies, this study proposes an innovative approach that integrates biomass thermochemical conversion with metallurgical slag heat recovery, resulting in a novel coupled waste heat utilization system. A three-dimensional rotary reactor model was created using a coupled CFD-DEM, incorporating the dense discrete phase model (DDPM) to numerically analyze the multiphase flow and heat transfer interactions between hot copper slag (CS) and biomass particles (WTS). The results demonstrate that increasing CS loading enhances particle mixing, elevates average rolling velocity, and improves thermal contact between WTS and CS, thereby accelerating heat transfer. The particle bed exhibits a typical rolling flow regime with distinct active (near-wall) and passive (core) zones. Notably, a 20 % CS loading produces the highest and most uniform temperature distribution, while even a 5 % loading significantly improves heating performance. Particle trajectory analysis reveals strong radial segregation driven by centrifugal and shear forces, which influences thermal conductivity. Across all cases, the mixing index remains below 0.2, indicating limited mixing due to disparities in particle size and density. Moreover, higher rotation speeds improve thermal uniformity, with 8 rpm identified as the optimal condition. CS enhances the gas phase's effective thermal conductivity, leading to a more uniform temperature distribution. These findings provide detailed insights into particle dynamics and heat transfer in rotary kilns, enhancing biomass conversion efficiency and industrial waste heat recovery.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"469 ","pages":"Article 121713"},"PeriodicalIF":4.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0