Particuology最新文献

Strength and friction dependency of the stress Lode angle in true triaxial configurations: A discrete element perspective 真三轴结构中应力载荷角的强度和摩擦依赖性：一个离散元的视角

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-18 DOI: 10.1016/j.partic.2025.04.009

Shiva Prashanth Kumar Kodicherla , Minyi Zhu

{"title":"Strength and friction dependency of the stress Lode angle in true triaxial configurations: A discrete element perspective","authors":"Shiva Prashanth Kumar Kodicherla , Minyi Zhu","doi":"10.1016/j.partic.2025.04.009","DOIUrl":"10.1016/j.partic.2025.04.009","url":null,"abstract":"<div><div>This article investigates the strength and frictional dependence on the stress Lode angle in drained true triaxial configurations using the discrete element method (DEM). A clump logic based on the multi-sphere (MS) approach within the commercial DEM software, particle flow code (PFC3D), was employed to simulate realistic particle shapes. The simulation results indicate that deviatoric stress initially exhibits strain hardening, followed by softening, while pure dilation occurs from the onset of shear. The evolutions of deviatoric stress and volumetric strains are found to be independent of both mean effective stress and intermediate stress ratios (<em>b</em>). The mobilized peak friction angle initially increases up to a certain value of <em>b,</em> then decreases with a further increase in <em>b</em>. The mechanical coordination number (MCN) and sliding contact fractions (SCF) remain unique and independent of <em>b</em> values. Moreover, the critical state friction angle has a significant influence on the stress ratios at the stress Lode angle <span><math><mi>θ</mi><mo>=</mo><mo>+</mo><mn>30</mn><mo>°</mo></math></span> when compared to <span><math><mi>θ</mi><mo>=</mo><mo>−</mo><mn>30</mn><mo>°</mo></math></span>.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"102 ","pages":"Pages 70-77"},"PeriodicalIF":4.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868309","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

On scaling laws of fast-fluidized-bed dynamics: Critical remarks and final solution 关于快速流化床动力学的标度规律：关键评论和最终解决方案

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-16 DOI: 10.1016/j.partic.2025.04.004

Ming-Chuan Zhang

{"title":"On scaling laws of fast-fluidized-bed dynamics: Critical remarks and final solution","authors":"Ming-Chuan Zhang","doi":"10.1016/j.partic.2025.04.004","DOIUrl":"10.1016/j.partic.2025.04.004","url":null,"abstract":"<div><div>Archimedes number (Ar) is the most important parameter characterizing the fluid-particle two-phase-flow system, which determines the ratio of terminal velocity of single particle to minimum gas velocity for fluidization, and then the possibility of two fluidized systems being similar in fast-fluidization flow-regime. After brief revisit of the scaling laws reported in literatures, the problem/limitations of missing Ar were revealed/identified. Starting from Glicksman's full set scaling laws, new simplified four identities scaling laws for mesoscale similarity were derived. They were confirmed, also, by the unified model for fast fluidization dynamics established by the present author and his co-workers. When the new criteria were applied for scaling-down a high-temperature CFB combustor to a cold-air model, about one tenth semi-spontaneous scaling for bed size was identified and declared. With this benefit, scaling down from a large CFB combustor, of 15 m in diameter, to a 1/20 cold model was demonstrated successfully. Further simplification was also conducted to the beds using same gas and particles for partial/macroscale similarity. With guidance of the unified model, the simplest scaling laws having two similitude identities were obtained. And this is coincident well with Qi and Zhu's empirical correlation, deduced from dozens more literature data sets and their own.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"102 ","pages":"Pages 53-69"},"PeriodicalIF":4.1,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868308","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

Heat transfer characteristics of CaO/Ca(OH)2 particle fluidization for thermochemical energy storage CaO/Ca(OH)2颗粒流化热化学储能的传热特性

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-15 DOI: 10.1016/j.partic.2025.04.005

Jingxiao Wang , Yishi Gu , Dingxuan Yuan , Zhongjie Shen , Jianliang Xu , Haifeng Liu

{"title":"Heat transfer characteristics of CaO/Ca(OH)2 particle fluidization for thermochemical energy storage","authors":"Jingxiao Wang , Yishi Gu , Dingxuan Yuan , Zhongjie Shen , Jianliang Xu , Haifeng Liu","doi":"10.1016/j.partic.2025.04.005","DOIUrl":"10.1016/j.partic.2025.04.005","url":null,"abstract":"<div><div>Thermochemical energy storage (TCES) based on the reversible hydration/dehydration of CaO/Ca(OH)<sub>2</sub> is emerging as a promising method for harnessing sustainable and renewable energy sources. In this study, a fluidized bed reactor was utilized to investigate the flow and heat transfer characteristics of micron-sized CaO/Ca(OH)<sub>2</sub> particles under dilute-phase conditions. Detailed experiments were carried out to measure particle concentration, temperature distribution, and heat transfer coefficients across a range of operating parameters. The results demonstrated that the heat transfer coefficient from the heated wall to the fluidized particles increases significantly with both reaction temperature and vapor partial pressure. Furthermore, the cluster renewal model was employed to predict the heat transfer behavior, achieving a low average relative error compared to the experimental data. These findings enhance the fundamental understanding of fluidized-bed-based CaO/Ca(OH)<sub>2</sub> TCES processes and offer practical guidelines for optimizing large-scale, high-temperature energy storage systems in support of intermittent renewable energy applications.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"102 ","pages":"Pages 41-52"},"PeriodicalIF":4.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863416","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

An approach to determine settling properties of flocculated tailings suspensions based on a single batch settling test 基于单批次沉降试验确定絮凝尾砂悬浮液沉降性能的方法

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-12 DOI: 10.1016/j.partic.2025.04.003

Lianfu Zhang , Ke Yang , Feiyue Liu , Lingshan Zhu , Wentao Xia , Hongjiang Wang , Xiang He , Yongqiang Hou

引用次数: 0

Controlled dispersion and velocity evolution of explosion-driven submillimeter particle groups: An experimental and numerical simulation study 爆炸驱动的亚毫米颗粒群的受控分散和速度演化：实验和数值模拟研究

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-11 DOI: 10.1016/j.partic.2025.04.001

Shaohong Wang , Ruijun Fan , Jinying Wang , Aiguo Pi

{"title":"Controlled dispersion and velocity evolution of explosion-driven submillimeter particle groups: An experimental and numerical simulation study","authors":"Shaohong Wang , Ruijun Fan , Jinying Wang , Aiguo Pi","doi":"10.1016/j.partic.2025.04.001","DOIUrl":"10.1016/j.partic.2025.04.001","url":null,"abstract":"<div><div>Low collateral damage munitions incorporate tens of thousands of submillimeter heavy metal particles in the shell, replacing the conventional metal shell. These munitions achieve near-field damage capabilities comparable to that of conventional munitions, while relying on the dispersion decay characteristics of the particles to control the range of damage. However, the submillimeter size of particles poses significant challenger in analyzing explosion-driven scattering. In this study, X-ray test was used to capture the scattering and dispersion state of the particle groups driven by blast load. The scattering evolution was simulated using the discrete element method (DEM) coupled with the finite element method (FEM). The extended velocity field distribution was analyzed in terms of the two-phase flow forces governing particle decay, to reveal the velocity evolution during particle group scattering and qualitatively analyze its influencing factors. Ensuring the strength of the layer structure, results indicate that lower particle content in the structural shell promotes easier expansion and rupture, enhancing the scattering ability of the particle group. The initial particle velocity is determined by the explosive energy and the mass ratio of the composite shell to the explosive (M/C). Near-field explosion dynamics involve complex interactions among shock waves, blast products, and particles groups in a multiphase medium. In contrast, far-field behavior reflects particle decay driven by air resistance, which is related to the resistance characteristic time. This study presents a method for calculating particle group velocity evolution, offering valuable insights for the engineering design and effect assessment of low collateral damage munitions.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"100 ","pages":"Pages 232-244"},"PeriodicalIF":4.1,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847309","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

Fabrication of high-purity alumina particles by spray drying and surface modification with SDS for methylene blue removal 喷雾干燥和SDS表面改性制备高纯度氧化铝颗粒去除亚甲基蓝

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-11 DOI: 10.1016/j.partic.2025.03.019

Van Doan Nguyen, Anh-Tuan Vu, The Vinh La

{"title":"Fabrication of high-purity alumina particles by spray drying and surface modification with SDS for methylene blue removal","authors":"Van Doan Nguyen, Anh-Tuan Vu, The Vinh La","doi":"10.1016/j.partic.2025.03.019","DOIUrl":"10.1016/j.partic.2025.03.019","url":null,"abstract":"<div><div>In the present paper, we facilely fabricated novel high-purity alumina particles with uniform morphology and size distribution by spray drying method. Despite the synthesized alumina's excellent physical characteristics, its interaction with dyes remains low. Sodium dodecyl sulfate (SDS), an anionic surfactant, was chosen to modify the alumina surface for enhanced methylene blue (MB) removal performance. The SDS-modified alumina (SA) adsorbent properties were discovered by utilizing fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), zeta potential, scanning electron microscope (SEM), and nitrogen adsorption/desorption isotherms. The favorable conditions for MB removal onto SA including working solution pH, SDS concentration, material dosage, adsorbate concentration, strength of ionic, and temperature were set at 60 min. The MB removal efficiency on SA reached approximately 99 % with a corresponding reaction rate of 0.05 g/(mg min). In addition, the MB adsorption isotherm was illustrated effectively using a two-step sorption model, with a calculated <em>q</em><sub>max</sub> value of 60.99 mg/g. The novel adsorbent exhibited strong adsorption affinity for both MB, Janus Green B (JGB), and Victoria Blue B (VBB). The removal mechanism of MB on SA was thoroughly conferred and supported by FT-IR analysis and zeta potential. Furthermore, the removal efficiency of SA only decreased nearly 15 % after 5 cycles, indicating that the adsorbent exhibited respectable regeneration performance. These results demonstrated that SA is a promising material for the scavenge of wastewaters containing various cationic dyes.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"102 ","pages":"Pages 27-40"},"PeriodicalIF":4.1,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855006","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

On crystallization procedure of sodium dihydrogen phosphate within H2O-ethylene glycol binary system 磷酸二氢钠在水-乙二醇二元体系中的结晶过程

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-05 DOI: 10.1016/j.partic.2025.03.017

Yayuan Zheng, Hao Lv, Xinka He, You Zhou, Cheng Gou, Huaiming Du, Ping Zhu

{"title":"On crystallization procedure of sodium dihydrogen phosphate within H2O-ethylene glycol binary system","authors":"Yayuan Zheng, Hao Lv, Xinka He, You Zhou, Cheng Gou, Huaiming Du, Ping Zhu","doi":"10.1016/j.partic.2025.03.017","DOIUrl":"10.1016/j.partic.2025.03.017","url":null,"abstract":"<div><div>The application of sodium dihydrogen phosphate (NaH<sub>2</sub>PO<sub>4</sub>) in drinking water and food processing underscores the importance of its crystallization process, which significantly affects product quality and yield. In this study, the dynamic laser method was used to explore the solubility and super-solubility of NaH<sub>2</sub>PO<sub>4</sub> in H<sub>2</sub>O-ethylene glycol (EG) binary systems of different proportions. We first applied the Apelblat, Van't Hoff, and NIBS-RK models to correlate solubility data and identified the best-fitting model. Then, the Mersmann and Barata models were used to determine the solid-liquid surface tension and crystal surface entropy factor. The Van't Hoff model calculated the molar enthalpy, entropy of dissolution, and Gibbs free energy. Experimental results showed that dissolution is endothermic and spontaneous, mainly driven by enthalpy changes, while crystallization is exothermic, providing key data for kinetics research. In the kinetics analysis, NaH<sub>2</sub>PO<sub>4</sub> crystallization was found to be linearly correlated growth, with the logarithm of crystal particle number density positively related to particle size. Comparing the CR and ASL models, the ASL model better reflects the growth rate. The derived nucleation and growth kinetics models indicated that growth and nucleation rates are positively correlated with temperature and supersaturation ratio. During cooling crystallization, the supersaturation ratio has a greater impact on the growth rate than the nucleation rate and a more significant effect on nucleation than suspension density and stirring rate. This research offers valuable guidance for high-quality NaH<sub>2</sub>PO<sub>4</sub> industrial production.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"100 ","pages":"Pages 245-256"},"PeriodicalIF":4.1,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847317","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

Calibration of DEM input parameters for simulation of the cohesive materials: Comparison of response surface method and machine learning models 黏性材料模拟DEM输入参数的标定：响应面法与机器学习模型的比较

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-05 DOI: 10.1016/j.partic.2025.03.018

Behrooz Jadidi, Mohammadreza Ebrahimi, Farhad Ein-Mozaffari, Ali Lohi

引用次数: 0

Enhanced solar absorption and steam generation in lithium bromide-based modified copper oxide nanofluids under simulated solar flux 模拟太阳通量下溴化锂基改性氧化铜纳米流体的增强太阳吸收和蒸汽生成

IF 4.1 2区材料科学

Particuology Pub Date : 2025-04-03 DOI: 10.1016/j.partic.2025.03.016

Tamseela Habib , Muhammad Amjad , Mohamed Edokali , Shahid Imran , Zahid Anwar , Muhammad Asim , Ali Hassanpour

{"title":"Enhanced solar absorption and steam generation in lithium bromide-based modified copper oxide nanofluids under simulated solar flux","authors":"Tamseela Habib , Muhammad Amjad , Mohamed Edokali , Shahid Imran , Zahid Anwar , Muhammad Asim , Ali Hassanpour","doi":"10.1016/j.partic.2025.03.016","DOIUrl":"10.1016/j.partic.2025.03.016","url":null,"abstract":"<div><div>Multiphase flow and heat transfer processes are involved in various applications, such as water desalination, sterilisation, and power generation. Environmentally friendly and sustainable system operation can be ensured through the utilisation of renewable energy resources. Furthermore, the thermal efficiency of these systems can be enhanced by using nanofluids. This study reports an experimental investigation of the photothermal conversion properties of polyethylenimine (PEI) functionalised Copper oxide (CuO) nano particles used in Lithium Bromide (LiBr) salt solutions. The nano particles were characterised by the dynamic light scattering (DLS), transmission electron microscope (TEM), ultraviolet visible (UV–Vis) spectrophotometer. The long-term stability of the prepared nanofluid was evaluated using a high-speed centrifuge analyser. The instability index of 0.071 ± 0.002 indicated low agglomeration and sedimentation tendencies. Photothermal conversion efficiency for different concentrations of CuO was experimentally investigated under a solar simulator. The experiments were conducted with nanofluids containing 55 wt% of LiBr and PEI functionalised nanoparticles, with loading ranging from 0.05 to 0.15 wt%. The addition of nanoparticles resulted in an increase in surface temperature, up to 90.69 ± 2.7 % higher than the base case tested with deionised water (DIW). Experimental results further confirms that the nanofluid tested in this study has the potential to significantly increase solar energy trapping efficiency and evaporation rate due to a localised solar energy harvesting by the surface of nanofluid. It was found that a 0.1 wt% CuO NP concentration is the optimum nanofluid concentration in terms of stability for enhanced sensible and latent heat efficiencies.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"102 ","pages":"Pages 1-14"},"PeriodicalIF":4.1,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855004","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

Effect of co-incineration of sludge with MSW: Evolution characteristics of coarse ash particles and associated de novo synthesis of dioxin 污泥与生活垃圾共焚烧的效果：粗灰颗粒演化特征及相关二恶英的重新合成

IF 4.1 2区材料科学

Particuology Pub Date : 2025-03-27 DOI: 10.1016/j.partic.2025.03.014

Runru Zhu , Yun Huang

{"title":"Effect of co-incineration of sludge with MSW: Evolution characteristics of coarse ash particles and associated de novo synthesis of dioxin","authors":"Runru Zhu , Yun Huang","doi":"10.1016/j.partic.2025.03.014","DOIUrl":"10.1016/j.partic.2025.03.014","url":null,"abstract":"<div><div>This paper aims to report the evolution characteristics of the coarse ash particles generated from the co-incineration of municipal solid waste with other wastes, e.g. sewage sludge, to suggest suitable operational strategies to handle the side effects. By using an evolution model which addresses the mechanism of char combustion, volatile-induced fragmentation, and the transformation of included and excluded minerals particles, the coarse ash particle evolution process in the waste incinerator is successfully predicted. By comparing with in-situ measurement data of a 200 t/d forward grate MSW incinerator, the predicted total particle concentration is 275.7 mg/Nm<sup>3</sup>, and the relative difference is about 4.2 %. Although the variation in flue gas parameters has little effect on the distribution characteristics of coarse ash particles from municipal solid waste incineration (MSWI), the carbon content of coarse ash particles is more sensitive to flue parameter change. Due to the tight relationship between the PCDD/Fs and the carbon content of ash particles under the mechanism of the <em>de novo synthesis</em>, the increase in carbon concentration caused by the co-incineration of low-calorific value waste will increase the probability of the PCDD/Fs formation.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"100 ","pages":"Pages 157-165"},"PeriodicalIF":4.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768894","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