Powder Technology最新文献_第2页

Rapid and versatile numerical simulations of acoustic agglomeration by the fixed pivot-based population balance modeling

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-23 DOI: 10.1016/j.powtec.2025.120821

Pengzhan Liu , Xiaopeng Shang , Morgan WeiZhi Tan , Duojia Shi , Xin Zhang , Guicai Liu , Shi Hao Lim , Hang Yin , Man Pun Wan , Grzegorz Lisak , Bing Feng Ng

{"title":"Rapid and versatile numerical simulations of acoustic agglomeration by the fixed pivot-based population balance modeling","authors":"Pengzhan Liu , Xiaopeng Shang , Morgan WeiZhi Tan , Duojia Shi , Xin Zhang , Guicai Liu , Shi Hao Lim , Hang Yin , Man Pun Wan , Grzegorz Lisak , Bing Feng Ng","doi":"10.1016/j.powtec.2025.120821","DOIUrl":"10.1016/j.powtec.2025.120821","url":null,"abstract":"<div><div>Acoustic agglomeration (AA), which harnesses sound waves to enhance particle collision for agglomeration, is a promising technology for aerosol emission control. In addition to direct experimentation, numerical modeling has become another type of useful auxiliary toolsets for AA research. However, the existing modeling methods are computationally demanding and fail to precisely capture critical information on evolution of particle statistics with a versatile manner. Here, we present a novel temporal population balance modeling (PBM) methodology for AA processes using an efficient fixed-pivot strategy, which is capable of implementing rapid and versatile numerical simulations to investigate time-domain evolution of statistical properties of aerosol particles under sound waves. The reliability of the algorithm is validated through a classic analytical solution and a set of experimental results from a previous study. Furthermore, by incorporating multiple AA kernels, we cover a wide spectrum of aerosol and acoustic conditions and numerically investigate and analyze a series of simulation cases. This universal and robust PBM tool based on the fixed pivot method provides a rapid approach to theoretically predict, visualize, and understand sound-induced evolution behaviors of aerosol particle populations, which could further be favored by other physical aerosol agglomeration topics.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120821"},"PeriodicalIF":4.5,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512399","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 investigation and analysis of pressure fluctuations in pneumatic conveying systems with fine bulk solids

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-23 DOI: 10.1016/j.powtec.2025.120803

M. Dikty

引用次数: 0

Experimental research on lateral pressure of five-compartment cement silo wall with inverted cone-bottom

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-22 DOI: 10.1016/j.powtec.2025.120820

Haiyan Liu , Ying Li , Zhaoming Wang , Lingyu Wu , Qikeng Xu , Hongbo Qu

{"title":"Experimental research on lateral pressure of five-compartment cement silo wall with inverted cone-bottom","authors":"Haiyan Liu , Ying Li , Zhaoming Wang , Lingyu Wu , Qikeng Xu , Hongbo Qu","doi":"10.1016/j.powtec.2025.120820","DOIUrl":"10.1016/j.powtec.2025.120820","url":null,"abstract":"<div><div>In the cement industry, five-compartment silos are employed to achieve the “a silo multi-storage” function, aiming to save costs and land area. However, when designing a five-compartment cement silo, fan-ring section and inverted cone-bottom shape make it difficult to accurately calculate the wall lateral pressure because height-to-diameter ratio and calculated storage height ill-defined. This paper designs two models of five-compartment silo with flat-bottom and inverted cone-bottom with 1000 mm outer diameter and 2000 mm high, completes experiments on static and dynamic lateral pressures for four tests. Calculated storage height is the clear height from the upper surface of the stored material to the point where the silo wall meets the inverted cone-bottom; The more elongated compartments cause 73 % of static average lateral pressure to exceed Janssen theoretical values; More than 80 % of maximum dynamic lateral pressure during discharge appear at the moment of initial cement outflow and mass flow stage, dynamic pressure fluctuation at inverted cone-bottom is more obvious; The concept of overpressure contrast coefficient is proposed and modified lateral pressure calculation formulas applicable to slender five - compartment reinforced concrete silos are given.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120820"},"PeriodicalIF":4.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487449","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 uncertainty evaluation of Moment-Ratio mean diameters for multimodal distribution

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-22 DOI: 10.1016/j.powtec.2025.120809

Qiwen Jin, Dian Zhu, Liangliang Tan, Lechong Chen, Zhiliang Xue, Zhiming Lin, Yingchun Wu, Xuecheng Wu

{"title":"On the uncertainty evaluation of Moment-Ratio mean diameters for multimodal distribution","authors":"Qiwen Jin, Dian Zhu, Liangliang Tan, Lechong Chen, Zhiliang Xue, Zhiming Lin, Yingchun Wu, Xuecheng Wu","doi":"10.1016/j.powtec.2025.120809","DOIUrl":"10.1016/j.powtec.2025.120809","url":null,"abstract":"<div><div>The uncertainty in Moment-Ratio (M-R) mean diameters for multi-modal or multi-peak particle systems has not been fully addressed within a comprehensive theoretical framework. This study presents a generalized approach that utilizes Gaussian decomposition and error propagation principles to tackle this issue. For a particle size distribution (PSD) expressed as a linear combination of independent log-normal distributions (LNDs), an expression for the overall M-R mean diameter is derived, based on the distribution parameters and weight coefficients of each LND. Since the terms in this expression are independent, the uncertainty in the M-R mean diameter for a multi-modal distribution is quantified through error propagation. Incorporating Masuda’s classical theory, a theoretical formula is developed. Numerical simulations validate the proposed theory, demonstrating high accuracy in estimating uncertainties for <span><math><msub><mrow><mi>D</mi></mrow><mrow><mn>3</mn><mo>,</mo><mn>2</mn></mrow></msub></math></span> and <span><math><msub><mrow><mi>D</mi></mrow><mrow><mn>4</mn><mo>,</mo><mn>3</mn></mrow></msub></math></span>, with some underestimation observed for <span><math><msub><mrow><mi>D</mi></mrow><mrow><mn>1</mn><mo>,</mo><mn>0</mn></mrow></msub></math></span> and <span><math><msub><mrow><mi>D</mi></mrow><mrow><mn>3</mn><mo>,</mo><mn>0</mn></mrow></msub></math></span>.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120809"},"PeriodicalIF":4.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474415","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

Nucleation and crystallization behaviors of dipyrone in the pilot-scale stirred tank with different impeller types: Experiments and simulations

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-22 DOI: 10.1016/j.powtec.2025.120825

Yi Sui , Wenchun Jiang , Huibo Meng , Zhuwen Shao , Yingzheng Meng , Jiayue Liu

{"title":"Nucleation and crystallization behaviors of dipyrone in the pilot-scale stirred tank with different impeller types: Experiments and simulations","authors":"Yi Sui , Wenchun Jiang , Huibo Meng , Zhuwen Shao , Yingzheng Meng , Jiayue Liu","doi":"10.1016/j.powtec.2025.120825","DOIUrl":"10.1016/j.powtec.2025.120825","url":null,"abstract":"<div><div>Nucleation processes in solution crystallization are significantly affected by scaling up. This study focuses on the crystallization behavior of dipyrone in a 37 L stirred tank with 95 % ethanol, while the effects of three impeller types (SH-PI, DH, and A320-DW) on nucleation are examined. The nucleation parameters including nucleation rate <em>J</em>, critical Gibbs free energy, critical nucleation size, and chemical potential difference ∆<em>μ</em>, were calculated using the modified Sangwal's model and classical nucleation theory. The ∆<em>μ</em> was influenced by both impeller type and cooling rate <em>R</em>, with the latter exerting a more significant influence. <em>J</em> was most significantly affected by <em>T</em><sub>0</sub>. As <em>T</em><sub>0</sub> increased from 328.15 K to 338.15 K and then to 348.15 K, the average <em>J</em> value increased by 7.99-fold and 4.99-fold, respectively. Particle size distribution (PSD) analysis revealed that particle size increased as <em>T</em><sub>0</sub> decreased and <em>R</em> increased. Based on the <em>J</em> value and PSD, A320-DW impeller is recommended for the nucleation process at higher <em>T</em><sub>0</sub>. The electron structure of the dipyrone molecule was calculated by density functional theory (DFT), suggesting that the monoclinic crystal habit of dipyrone arises from stronger interactions at one end of the long chain of the molecules. This study provides valuable insights into the nucleation and characteristics of crystals from the perspective of industrial crystallization.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120825"},"PeriodicalIF":4.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511777","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

Enhancing supergravity separation performance of oil shale using sodium carboxymethyl cellulose as a dispersant

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-21 DOI: 10.1016/j.powtec.2025.120826

Lingtao Zhu , Jingfeng He , Bin Yang

{"title":"Enhancing supergravity separation performance of oil shale using sodium carboxymethyl cellulose as a dispersant","authors":"Lingtao Zhu , Jingfeng He , Bin Yang","doi":"10.1016/j.powtec.2025.120826","DOIUrl":"10.1016/j.powtec.2025.120826","url":null,"abstract":"<div><div>Currently, efficient separation of fine-grained oil shale using gravity separation method is challenging due to particle agglomeration. In this study, sodium carboxymethyl cellulose (CMC-Na) was employed as a dispersant to enhance the separation of fine-grained oil shale through supergravity separation. Supergravity separation experiments and XPS analysis revealed that the addition of CMC-Na significantly improved the recovery of combustible matter in oil shale. Settlement tests and particle size distribution analysis had shown that oil shale particles exhibited better dispersion in the CMC-Na solution. Furthermore, contact angle measurements and zeta potential analyses indicated that CMC-Na enhanced the wettability of oil shale particle surfaces and increased electrostatic repulsion between particles, thereby reducing particle agglomeration and entrainment. Consequently, at a centrifugal speed of 500 rpm, the use of CMC-Na as a dispersant facilitated the pre-enrichment of oil shale, effectively increasing the combustible recovery rate by 10.35 %. This study provides an effective method for the separation and improvement of fine-grained oil shale.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120826"},"PeriodicalIF":4.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512401","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

Numerical investigation of bed hydrodynamics for biomass-coal blending in a dual fluidized bed system

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-21 DOI: 10.1016/j.powtec.2025.120807

Rabindra Kangsha Banik, Hirakh Jyoti Das, Pankaj Kalita

{"title":"Numerical investigation of bed hydrodynamics for biomass-coal blending in a dual fluidized bed system","authors":"Rabindra Kangsha Banik, Hirakh Jyoti Das, Pankaj Kalita","doi":"10.1016/j.powtec.2025.120807","DOIUrl":"10.1016/j.powtec.2025.120807","url":null,"abstract":"<div><div>Dual fluidized bed gasification (DFBG) technology yields superior syngas from a variety of feedstock. The performance of a DFBG system is greatly influenced by the hydrodynamics, heat and mass transfer within the solid-gas flow system. The hydrodynamic characteristics become more complex with the use of blended feedstock of varying physio-chemical properties owing to their non-linearity and transient nature. Therefore, it is crucial to understand hydrodynamic characteristics of such a blended gas-solid system. The present study uses Multiphase Flow with Interphase eXchanges (MFiX) simulation to examine the effects of blending biomass and coal with sand on hydrodynamics of a DFBG system. The simulation of the gasifier and riser has been performed using two-fluid model (TFM) considering constant superficial air velocities for six alternative biomass-coal blending proportions, such as 0:5, 1:4, 2:3, 3:2, 4:1, and 5:0. The numerical analysis has revealed that in biomass-coal blending, increasing the biomass fraction reduces static pressure as well as bed pressure drop, while axial voidage rises in the gasifier as well as riser. Similar to the pressure profile, the suspension density of the gasifier declines as biomass content in the blending increases. Nonetheless, voidage and solid velocity profiles in the radial direction of the gasifier and riser reveal an inverted U-shape, with biomass having the highest voidage and velocity, whereas sand possesses the lowest voidage and velocity. This study establishes the foundation for experimental investigation of the DFBG system's performance using blended feedstock.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120807"},"PeriodicalIF":4.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487450","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

The hydrodynamic characteristics of a squirmer swimming in a lid-driven cavity

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-20 DOI: 10.1016/j.powtec.2025.120817

Yining Yang , Zhenyu Ouyang , Hao Ye , Jianbao Xu , Jianzhong Lin

{"title":"The hydrodynamic characteristics of a squirmer swimming in a lid-driven cavity","authors":"Yining Yang , Zhenyu Ouyang , Hao Ye , Jianbao Xu , Jianzhong Lin","doi":"10.1016/j.powtec.2025.120817","DOIUrl":"10.1016/j.powtec.2025.120817","url":null,"abstract":"<div><div>This article employs the Lattice Boltzmann method (LBM) to investigate the hydrodynamic characteristics of a squirmer, modeled after a classic microbial, swimming in a lid-driven cavity. The study analyzes the effects of self-propulsion strength (<em>β</em>), fluid inertia caused by the swimming Reynolds number (<em>Re</em><sub><em>s</em></sub>), shear Reynolds number (<em>Re</em>) of the flow field, and the particle-to-cavity size ratio <em>k</em> on the swimming behavior of the squirmer. Three typical swimming modes are defined: closed-loop swimming, periodic swimming, and directional trapping. The results show that <em>β</em> and <em>Re</em><sub><em>s</em></sub> jointly affect the transitions between these modes, with stronger self-propulsion and fluid inertia favoring directional trapping. During directional trapping, although the squirmer remains relatively stationary, it interacts with the surrounding fluid, potentially causing the development of multiple secondary vortices. Increasing <em>Re</em> induces a transition from the mode of closed-loop swimming to directional trapping, particularly when <em>Re</em> ≥ 500. The particle-to-cavity size ratio also influences the movement of the squirmer, particularly in the case of the Puller (one kind of squirmer). Pusher (the other kind of squirmer) consistently maintains the closed-loop swimming mode, while Puller experiences multiple swimming mode transitions. These findings contribute to a deeper understanding of the dynamic interactions of microswimmers in complex environments, providing valuable insights for designing microrobots for biomedical applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120817"},"PeriodicalIF":4.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487442","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

A green approach for silicon separation and purification from diamond wire saw silicon powder waste slurry

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-20 DOI: 10.1016/j.powtec.2025.120812

Shifeng Han , Yun Li , Yile Xiong , Shicong Yang , Kuixian Wei , Wenhui Ma , Jianqiang Zhang

{"title":"A green approach for silicon separation and purification from diamond wire saw silicon powder waste slurry","authors":"Shifeng Han , Yun Li , Yile Xiong , Shicong Yang , Kuixian Wei , Wenhui Ma , Jianqiang Zhang","doi":"10.1016/j.powtec.2025.120812","DOIUrl":"10.1016/j.powtec.2025.120812","url":null,"abstract":"<div><div>During silicon wafer cutting, a significant amount of diamond wire saw silicon powder (DWSSP) waste slurry is generated, leading to severe oxidation and hindering silicon purification due to prolonged conventional processing. In this study, a green approach based on centrifugation and on-line H<sub>2</sub>SO<sub>4</sub> leaching, is proposed for the silicon separation and purification. The results indicate that under the influence of centrifugal force, rapid solid-liquid separation and impurity removal of the DWSSP waste slurry have been achieved. Direct concentrated H<sub>2</sub>SO<sub>4</sub> to the concentrated liquid eliminates acid mixing, and efficiently purifying while minimizing silicon oxidation interference, reducing total impurity content in silicon-rich powder to 54.8 ppmw. In-situ experiment verifies the total impurity content in silicon-rich powder at 99.5 ppmw, with oxygen content decreased to 2.73 %, confirming the viability of the green silicon purification approach. This study provides crucial guidance for the rapid recovery and preparation of high-purity silicon from DWSSP waste slurry.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120812"},"PeriodicalIF":4.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487451","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

DEM simulation of particle attrition in mechanofusion device

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-20 DOI: 10.1016/j.powtec.2025.120822

Wei Pin Goh, Mojtaba Ghadiri

引用次数: 0