Particuology最新文献_第8页

Optical and radiative properties of coated black carbon during hygroscopic growth and retrieval errors of mixing state using single-particle soot photometer 涂覆黑碳吸湿生长过程中的光学和辐射特性及单粒子烟尘光度计混合态反演误差

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.12.010

Jia Liu , Donghui Zhou , Cancan Zhu , Jinbao Han , Bo Yin

{"title":"Optical and radiative properties of coated black carbon during hygroscopic growth and retrieval errors of mixing state using single-particle soot photometer","authors":"Jia Liu , Donghui Zhou , Cancan Zhu , Jinbao Han , Bo Yin","doi":"10.1016/j.partic.2024.12.010","DOIUrl":"10.1016/j.partic.2024.12.010","url":null,"abstract":"<div><div>Under environment with various water contents, the variations in the mixing state and particle size of coated black carbon (BC) aerosols cause changes in optical and radiative effects. In this study, fractal models for thinly, partially, and thickly coated BC under six relative humidities (RHs = 0–95%) are constructed and optically simulated at 1064 and 532 nm. Differential scattering cross-sections are selected to retrieve the mixing state (<em>D</em><sub><em>p</em></sub>/<em>D</em><sub><em>c</em></sub>) of BC to investigate the possible retrieval errors caused by the nonspherical morphology when using the single-particle soot photometer (SP2). Furthermore, the radiative forcing of BC aerosols at different RHs are analyzed. Results showed that the retrieval errors (REs) of <em>D</em><sub><em>p</em></sub><em>/D</em><sub><em>c</em></sub> are negative for coated particles with BC volume fraction smaller than 0.10, indicating that the mixing states of coated fractal BC are underestimated during the hygroscopic growth. The partially-coated BC has the best retrieval accuracy of the mixing state, followed by the closed-cell and coated-aggregate model, judging from averaged REs. Radiative forcing enhancements for partially-coated aerosols with different BC volume fractions exponentially increase to opposite values, resulting in a warming or cooling effect. This study helps understand the uncertainties in <em>D</em><sub><em>p</em></sub>/<em>D</em><sub><em>c</em></sub> of BC aerosols retrieved by SP2 and their radiative forcing at different RHs.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 183-192"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulations of gas-liquid-solid circulating flows coupled to mesoscale parameters and measurements 气液固循环流动与中尺度参数和测量耦合的数值模拟

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.12.013

Lubin Zhang , Yongli Ma , Mingyan Liu

{"title":"Numerical simulations of gas-liquid-solid circulating flows coupled to mesoscale parameters and measurements","authors":"Lubin Zhang , Yongli Ma , Mingyan Liu","doi":"10.1016/j.partic.2024.12.013","DOIUrl":"10.1016/j.partic.2024.12.013","url":null,"abstract":"<div><div>Gas-liquid-solid circulating fluidized bed (GLSCFB) is an important type of chemical reactor. The complex mesoscale flow structure of GLSCFB was described through the mesoscale flow structure parameters based on the energy-minimization multi-scale (EMMS) model. The liquid-solid drag force model (Drag-ls model) was proposed and it was found that the drag coefficient between liquid and solid in three-phase systems increased compared to liquid-solid two-phase systems because of the influence of gas phase. The gas-solid drag force model (Drag-gs model) was proposed based on a modified unified wake model. Furthermore, the combination of EMMS model and computational fluid dynamics (CFD) in GLSCFB was implemented, and the dynamic evolution process of particle clusters and distributions of gas holdup and solid holdup in GLSCFB were simulated more accurately by the models. The simulation results indicate that the drag forces exerted on the solid phase by both the liquid and gas phases are coupled and mutually influence each other. The simulated values of solid holdup may deviate from the experimental values if the interactions between the gas-solid and liquid-solid phases are corrected independently. When the average solid holdup of the bed is low, the mesoscale phenomena such as particle aggregation are not obvious. As the solid holdup increases, there is a significant phenomenon of particle aggregation in the bed. The particles undergo a spatiotemporal evolution process of forming elongated clusters with high solid holdup, spherical clusters with high solid holdup, and clusters with low solid holdup which has large surface areas.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 236-256"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134324","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 critical velocity model for the incipient motion of non-spherical particles on cuttings bed in extended reach wells 大位移井岩屑床非球形颗粒初动临界速度模型

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.12.011

Wei Hu , Ning Guan , Jinya Zhang , Binggui Xu , Hongwu Zhu

{"title":"A novel critical velocity model for the incipient motion of non-spherical particles on cuttings bed in extended reach wells","authors":"Wei Hu , Ning Guan , Jinya Zhang , Binggui Xu , Hongwu Zhu","doi":"10.1016/j.partic.2024.12.011","DOIUrl":"10.1016/j.partic.2024.12.011","url":null,"abstract":"<div><div>Accurately predicting the minimum velocity required to initiate particles movement on a cuttings bed surface during drilling operations is crucial for efficient and cost-effective removal of deposited particles. However, current models neglect the influence of particle shape on the drag coefficient and static friction coefficient during rolling and sliding on a cuttings bed. Accordingly, this study developed an experimental setup for cuttings transport and employed both theoretical analysis and experimental methods to investigate the critical velocity for the incipient motion of particles under various operational conditions. A novel semi-mechanical criterion model was developed for the incipient motion of particles, incorporating a shape correction factor for non-spherical particles. A balance equation for the threshold Shields number, determined by particle driving forces and resistances, was established, and a numerical procedure was formulated to determine the critical velocity for the incipient motion of particles. The model predictions show strong agreement with experimental results. The study found that higher eccentricity, inclination, and fluid viscosity increased the difficulty of initiating particle movement on the cuttings bed surface, thus requiring higher annular velocities for effective cuttings removal. Conversely, increasing particle size facilitated easier removal of the cuttings bed. Compared to non-Newtonian fluids, Newtonian fluids proved more effective in cuttings removal. The findings of this study are significant for optimizing hole cleaning parameters and improving the efficiency of cuttings removal.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 193-206"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134325","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

DEM investigation into the coupling effects of particle asphericity and interface roughness on shear behaviour of soil-structure interface 颗粒非球形和界面粗糙度对土-结构界面剪切特性耦合影响的DEM研究

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.11.019

Dong Su , Dongzhan Wu , Meng Fan , Runqi Zhang , Jianhang Chen , Hao Xiong , Xiangsheng Chen

{"title":"DEM investigation into the coupling effects of particle asphericity and interface roughness on shear behaviour of soil-structure interface","authors":"Dong Su , Dongzhan Wu , Meng Fan , Runqi Zhang , Jianhang Chen , Hao Xiong , Xiangsheng Chen","doi":"10.1016/j.partic.2024.11.019","DOIUrl":"10.1016/j.partic.2024.11.019","url":null,"abstract":"<div><div>Soil-structure interfaces (SSI) are common in geotechnical structures, and understanding their shear behavior is essential for effective design. However, the coupling effects of particle shape and interface roughness on SSI remain understudied. This study addresses this gap by employing five types of super-ellipsoid particles with varying asphericity (<em>η</em>) values to model non-spherical particles. Interface shear tests with different roughness levels (<em>R</em><sub><em>n</em></sub>) were conducted using Discrete Element Method (DEM) simulations. The results show that both <em>η</em> and <em>R</em><sub><em>n</em></sub> significantly influence shear strength, localized shear band thickness, and soil fabric, with two types of coupling effects: single-factor dominance and double-factor interaction. The influence on coordination number (<em>C</em><sub><em>n</em></sub>) and probability distribution of normalized contact force is more straightforward. Specifically, non-spherical particles exhibit a higher initial <em>C</em><sub><em>n</em></sub> due to enhanced interlocking, while <em>R</em><sub><em>n</em></sub> has a lesser impact. The normalized contact force at the interface follows an exponential distribution, similar to pure soil, and is largely independent of <em>η</em> and <em>R</em><sub><em>n</em></sub>. Notably, the shear zone is divided into three equal parts for soil fabric analysis. These findings offer new insights into SSI, contributing to more effective and safer geotechnical designs.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 39-57"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134454","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

Experimental study on single-unit solid particle packed bed for thermal energy storage of extracted steam from thermal power plant to consume more renewable energy 火力发电厂抽汽蓄热单单元固体颗粒填料床的实验研究，提高可再生能源的利用率

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.12.007

Xiang Liu, Huaan Li, Laiquan Lv, Lijia Wei, Hao Zhou

{"title":"Experimental study on single-unit solid particle packed bed for thermal energy storage of extracted steam from thermal power plant to consume more renewable energy","authors":"Xiang Liu, Huaan Li, Laiquan Lv, Lijia Wei, Hao Zhou","doi":"10.1016/j.partic.2024.12.007","DOIUrl":"10.1016/j.partic.2024.12.007","url":null,"abstract":"<div><div>Solid particles instead of molten salt as a heat storage medium for extracted steam energy storage are essential in thermal power flexibility retrofit. This study constructs a charge-discharge experimental device using by-products from the steel industry as heat storage materials, similar to a battery cell, which is easily scalable and accomplishes the steam-solid particle-steam energy conversion. Investigation parameters include temperature distribution, power variation, and cycle efficiency for different charging and discharging modes. Results indicate that the charging mode II outperforms mode I in temperature uniformity, charging flow rate, and pressure loss, yielding higher charging power and total convective heat transfer coefficients at 13 kW and 275 W/(m<sup>2</sup> K), respectively. The pilot device demonstrates commendable insulating properties. Its heat dissipation rate is approximately 33.33%, which surpasses that of reported thermal storage devices. Moreover, the mode II exhibits superior temperature non-uniformity during heat release, ensuring that 40 kg/h of superheated steam at 220 °C can be produced continuously for 5 min. The cycling efficiency is noteworthy, reaching 65% in low flow rate discharge, accompanied by 79% charging efficiency and 82% discharging efficiency. A temperature difference cloud map elucidates the primary phase change region, emphasizing preheating, evaporation, and superheating segments. Experimental results provide new ideas for combining waste elimination in the steel industry and energy storage in thermal power plants.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 99-116"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134457","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

Green synthesis and eco-biological evaluation of Ag/Fe bimetallic nanoparticles using Vallaris solanacea leaf extract targeting insecticide resistance 抗虫缬草叶提取物银/铁双金属纳米颗粒的绿色合成及生态生物学评价

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.12.003

Arooj Azeem , Muhammad Naveed , Sarmad Mahmood , Shafiq ur Rehman , Tariq Aziz , Nouf A. Assiri , Sahar A. Alshareef , Maha Aljabri , Rewaa S. Jalal , Fakhria A. Al-Joufi

{"title":"Green synthesis and eco-biological evaluation of Ag/Fe bimetallic nanoparticles using Vallaris solanacea leaf extract targeting insecticide resistance","authors":"Arooj Azeem , Muhammad Naveed , Sarmad Mahmood , Shafiq ur Rehman , Tariq Aziz , Nouf A. Assiri , Sahar A. Alshareef , Maha Aljabri , Rewaa S. Jalal , Fakhria A. Al-Joufi","doi":"10.1016/j.partic.2024.12.003","DOIUrl":"10.1016/j.partic.2024.12.003","url":null,"abstract":"<div><div>The emergence of insecticide resistance presents a major challenge in pest control and agriculture, while the use of conventional pesticides raises environmental and health concerns. This study addresses these issues through the green synthesis of Ag/Fe bimetallic nanoparticles (BMNPs) using <em>Vallaris solanacea</em> plant extract and evaluates their eco-biological activities. The synthesized Ag/Fe BMNPs, with an average size of 30 nm as determined by SEM, were characterized by UV–Vis spectroscopy, FTIR, EDX, and SEM. In vitro assays revealed significant anti-inflammatory (91%), antioxidant (95%), anti-diabetic, anti-hemolytic, and antimicrobial activities. Additionally, the nanoparticles demonstrated 100% mortality against <em>Sitophilus oryzae</em> (rice weevil) and exhibited 97% degradation of the pesticide Novacide, indicating potent pesticidal and environmental remediation capabilities. Computational analysis, including molecular docking and molecular dynamics simulations, revealed strong interactions between Ag/Fe BMNPs and insecticide resistance (IR) proteins, with binding energies surpassing those of traditional pesticides, suggesting an ability to circumvent resistance mechanisms. These findings highlight the potential of Ag/Fe BMNPs as a sustainable, eco-friendly alternative for pest management and environmental applications in agriculture and beyond.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 80-98"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134465","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

Three-dimensional CFD-DEM investigation of dynamic characteristics of biomass particles in a conical spouted bed 锥形喷流床中生物质颗粒动态特性的三维CFD-DEM研究

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.11.013

Ming Hao , Xiaolong Xing

{"title":"Three-dimensional CFD-DEM investigation of dynamic characteristics of biomass particles in a conical spouted bed","authors":"Ming Hao , Xiaolong Xing","doi":"10.1016/j.partic.2024.11.013","DOIUrl":"10.1016/j.partic.2024.11.013","url":null,"abstract":"<div><div>A numerical investigation of the three-dimensional conical spouted bed was conducted using CFD coupled with discrete element method to systematically analyze particle-gas flow patterns, bubble volume fluctuations, and fountain characteristics. Moreover, the impact of conical angles on dynamic characteristics is demonstrated under varying gas inlet velocity and particle diameter. Firstly, the simulation result shows that increasing the conical angle is advantageous for enhancing both <em>y</em>-direction and angular velocities of particles, while the impact of this angle varies with inlet velocity and particle diameter. The great inlet velocity and particle diameter significantly enhance the voidage, while the larger conical angle promotes the uniform radial particle distribution. Besides, smaller conical angle and medium inlet velocity is prone to result in the higher frequency and amplitude for the fluctuations of particle height. Meanwhile, enlarging the conical angle results in a shift of the fountain frequency from high to low when the particle size is small. The conical angle plays a crucial role in determining bubble behavior under the condition of medium velocity and small diameter. Besides, the fine particle and small conical angle are prone to cause the noticeable main frequencies.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 207-218"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigations on the deposition characteristics of lunar dust in the human bronchial airways 月尘在人体支气管内沉积特性的数值研究

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.11.018

Hao Jing , Yuan Xue , Bin Wu , Yixiao Wang , Zhaojun Xi , Xinguang Cui

{"title":"Numerical investigations on the deposition characteristics of lunar dust in the human bronchial airways","authors":"Hao Jing , Yuan Xue , Bin Wu , Yixiao Wang , Zhaojun Xi , Xinguang Cui","doi":"10.1016/j.partic.2024.11.018","DOIUrl":"10.1016/j.partic.2024.11.018","url":null,"abstract":"<div><div>Although it is widely acknowledged that lunar dust (LD) is toxic to the human health, its deposition characteristics in the bronchial airways remain unknown, which is significantly important to understand its toxicity. Therefore, this study employs computational fluid dynamics and machine learning algorithm methods to address this issue considering the difficulty of conducting the experiments of LD deposition. The major results are: (1) the deposition efficiencies (DE) of micrometer-sized LD in the terminal bronchioles vary significantly depending on the human body posture, with a notable difference of DE up to 29% between standing and lying flat postures; (2) LD deposition in various bronchial regions shows differences under activity intensities, with higher DE in segmental bronchi and terminal bronchioles under intense and lower intensive activities, respectively; (3) In predicting DE of LD, machine learning algorithms outperform fitting functions, achieving higher precision and smaller errors, reducing the root mean square error by approximately 60%–80%. These results indicate that LD deposition characteristics in the bronchial airways under lunar environment are also influenced by the combined factors of particle size, activity intensity, and body posture.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 25-38"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134453","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

One-step synthesis of hierarchically porous fly ash-based NaX zeolite as assisted by CTAB for low-concentration CO2 adsorption CTAB辅助一步合成分级多孔粉煤灰基NaX沸石吸附低浓度CO2

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.12.002

Yao Wei , Hong Wu , Haowen Kong , Yingju Miao , Ping Wang

{"title":"One-step synthesis of hierarchically porous fly ash-based NaX zeolite as assisted by CTAB for low-concentration CO2 adsorption","authors":"Yao Wei , Hong Wu , Haowen Kong , Yingju Miao , Ping Wang","doi":"10.1016/j.partic.2024.12.002","DOIUrl":"10.1016/j.partic.2024.12.002","url":null,"abstract":"<div><div>Despite significant attention being drawn to the synthesis of zeolites from fly ash for CO<sub>2</sub> adsorption, few studies have focused on hierarchical porous NaX zeolites derived from fly ash. The existing synthesis methods are often complex, and the role of CTAB in zeolite formation remains unclear. To address these research gaps, we employed a one-step method for synthesizing hierarchically porous fly ash-based NaX zeolites with tunable mesoporosity. Utilizing CTAB as a template agent, we conducted a comprehensive investigation into the effects of varying CTAB dosages and aluminum source types on zeolite formation. The synthesized materials were fully characterized through XRD, FTIR, SEM, TEM, and N<sub>2</sub> adsorption/desorption analysis. The results showed that the mesoporous volume of the zeolites can be effectively controlled by adjusting the CTAB/Al<sub>2</sub>O<sub>3</sub> ratio. At an optimal ratio of 0.04, the synthesized zeolite has a surface area of 422 m<sup>2</sup>/g and a mesoporous volume of 0.116 cm<sup>3</sup>/g, which represents a two-fold increase compared to the NaX synthesized without CTAB. This improvement of mesoporosity significantly reduces the resistance to CO<sub>2</sub> diffusion, thereby enhancing the adsorption performance with a maximum adsorption capacity of 3.37 mmol/g and a high cyclic stability. A further investigation reveals the crucial role of CTAB in promoting mesopore formation and inhibiting crystal growth during zeolite synthesis. These findings provide valuable insights into the one-step synthesis of hierarchical porous zeolites.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 69-79"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134456","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 meso-scale flow model of gas-liquid-solid mini-fluidized beds with improved macro-scale interaction of wall effects 改进壁面效应宏观尺度相互作用的气液固微型流化床中尺度流动模型

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-01 DOI: 10.1016/j.partic.2024.12.005

Shaojie Li , Yongli Ma , Hao Guo , Mingyan Liu

{"title":"A meso-scale flow model of gas-liquid-solid mini-fluidized beds with improved macro-scale interaction of wall effects","authors":"Shaojie Li , Yongli Ma , Hao Guo , Mingyan Liu","doi":"10.1016/j.partic.2024.12.005","DOIUrl":"10.1016/j.partic.2024.12.005","url":null,"abstract":"<div><div>Gas-liquid-solid mini-fluidized beds known for high efficiency with controllable mass and heat transfer characteristics, have good application prospects in fields such as multiphase reaction process enhancement and intrinsic kinetic detection. For three-phase mini-flow systems, the bed wall has a significant impact on spatiotemporal distribution of multi-phase flow structure, which influence the motion state of dispersed phase, make predicted phase holdup and residence time deviate from experimental values. However, current research on the quantitative impact of bed walls on flow structures is still limited, which hinders the optimization design and industrial application of such reactors. In this work, a meso-scale flow model of gas-liquid-solid mini-fluidized beds considering macro-scale effects between bed wall and flow is developed based on the principle of meso-scale science and introducing semi-theoretical formulas that take the effects of bed walls on particles and bubbles into account. The calculated values of this model are in good agreement with experimental data, where prediction of phase holdup fits well with experimental results, the deviation of bubble size and terminal velocity are within 10%. Compared to existing models, this model demonstrates a higher level of accuracy in predicting the flow patterns of mini-fluidized beds, particularly those with pronounced wall effect. This research has laid a foundation for the design, scale-up and industrial application of mini-fluidized bed reactors.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"97 ","pages":"Pages 117-129"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134458","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