Computational Particle Mechanics最新文献_第7页

Resistance force scaling and the solution for penetration depth of impacting wet granular materials 冲击湿颗粒材料的阻力结垢及渗透深度求解

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-13 DOI: 10.1007/s40571-024-00867-z

Xingli Zhang, Dashuai Zhang, Xiangjin Wang, Honghua Zhao

{"title":"Resistance force scaling and the solution for penetration depth of impacting wet granular materials","authors":"Xingli Zhang, Dashuai Zhang, Xiangjin Wang, Honghua Zhao","doi":"10.1007/s40571-024-00867-z","DOIUrl":"10.1007/s40571-024-00867-z","url":null,"abstract":"<div><p>In-depth understanding and mastery of the dynamic characteristics of objects during impact and penetration into granular materials are of great significance for studying natural phenomena and applications in industrial fields. Existing studies mainly focus on the impact of dry and non-cohesive granular materials, while the presence of liquid leads to differences in penetration depth. There are relatively few studies on the wet granular materials, especially regarding the effect of interstitial liquids in wet particle packings on the resistance force experienced by projectiles, which has not yet been quantitatively described. To clarify the effect of interstitial liquid on the resistance force borne by the projectile and the final penetration depth, this study conducted laboratory tests of the spherical projectile impacting wet particle packings and monitored the dynamic characteristics of the projectile during the impact process. Based on the motion equations of the projectile, the relationship between the inertial resistance term, the frictional resistance term, and the water content of the granular material was investigated, and an empirical parametric scale for the impact resistance force in wet granular materials was proposed. Additionally, with the help of the Lambert W function in mathematics, the analytical solution for the final penetration depth is given, and its reasonableness and accuracy were verified through experimental data.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1169 - 1180"},"PeriodicalIF":2.8,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 multifield discrete element model for concrete 混凝土的多场离散元模型

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-13 DOI: 10.1007/s40571-024-00883-z

Christian Flack, Dieter Dinkler

引用次数: 0

Characterization of the ellipsoidal particle motion in a two-stage lifting pump using CFD-DEM method 用CFD-DEM方法表征两级提升泵中椭球粒子的运动

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-13 DOI: 10.1007/s40571-024-00887-9

Zuchao Zhu, Jiabin Sun, Zhe Lin, Yanjun Jin, Yi Li

{"title":"Characterization of the ellipsoidal particle motion in a two-stage lifting pump using CFD-DEM method","authors":"Zuchao Zhu, Jiabin Sun, Zhe Lin, Yanjun Jin, Yi Li","doi":"10.1007/s40571-024-00887-9","DOIUrl":"10.1007/s40571-024-00887-9","url":null,"abstract":"<div><p>The lifting pump is the core power equipment of the solid–liquid mixing system in deep-sea mining, but maintaining its stable operation while transporting particles is a major challenge for deep-sea mining hydro-transportation technology. This paper employs a CFD-DEM model suitable for the motion of ellipsoidal particles within a lifting pump and calculates the particle upstream surface at different inclination angles. Hydraulic transport of three types of ellipsoidal particles with aspect ratios of 1.0, 1.5 and 2.0 was simulated. An analysis of the motion characteristics of particles with different aspect ratios in a two-stage lifting pump found that an increase in aspect ratio decreased the overall velocity of the particles. When the aspect ratio increased, the aggregation effect of particles at the impeller inlet became more significant, and the conveying stability of the lifting pump decreased. Particles with high aspect ratios tend to clog the impeller vane inlets and create gyrations in the diffusion section of the pump. The peak velocity slip of particles in the diffusion section (pump outlet) decreases with an increasing aspect ratio. The results of the study will provide engineering theoretical support for the stable operation of lifting pumps.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 3","pages":"1579 - 1594"},"PeriodicalIF":2.8,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Accurate implicit moving particle simulation method with angular momentum conservation for high-viscous free-surface flow 高粘性自由表面流动的角动量守恒精确隐式运动粒子模拟方法

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-12 DOI: 10.1007/s40571-024-00865-1

Zidi Wang

{"title":"Accurate implicit moving particle simulation method with angular momentum conservation for high-viscous free-surface flow","authors":"Zidi Wang","doi":"10.1007/s40571-024-00865-1","DOIUrl":"10.1007/s40571-024-00865-1","url":null,"abstract":"<div><p>Particle methods, benefiting from the Lagrangian meshfree framework, have gained widespread application in free-surface flow simulations. Nonetheless, accurately modeling high-viscosity fluids remains a persistent challenge. In this study, we propose a new implicit moving particle simulation (IMPS) method specifically designed to address the complexities associated with high-viscous free-surface flows, tackling two main issues. Firstly, unlike the traditional Laplacian model, where orthogonal velocity components are treated as independent variables, this method enforces the velocity divergence-free constraint when discretizing the viscous term, effectively coupling the velocity components. This coupling is crucial for conserving angular momentum, especially in high-viscosity scenarios. Secondly, to overcome the time step restrictions imposed by high viscosity, a novel implicit calculation algorithm has been developed. This algorithm enables the simultaneous and implicit solution of pressure and velocity, ensuring the precise application of both free-surface and wall boundary conditions. The effectiveness of the IMPS method is rigorously verified through simulations, including a rotational flow in a circular pipe and a square fluid dropping from a platform. The results indicate that the developed method successfully captures the dynamics of high-viscous free-surface flows, demonstrating its potential for broader applications.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 3","pages":"1491 - 1505"},"PeriodicalIF":2.8,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Investigation of typical cavitation flow mode and flow field characteristics in a centrifugal pump 离心泵典型空化流态及流场特性研究

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-12 DOI: 10.1007/s40571-024-00878-w

Yong Wang, Jianing Lei, Jie Chen, Xiaolin Wang, Ming Li

{"title":"Investigation of typical cavitation flow mode and flow field characteristics in a centrifugal pump","authors":"Yong Wang, Jianing Lei, Jie Chen, Xiaolin Wang, Ming Li","doi":"10.1007/s40571-024-00878-w","DOIUrl":"10.1007/s40571-024-00878-w","url":null,"abstract":"<div><p>The objective of this paper is to investigate the cavitation flow field in centrifugal pump by combining experimental and numerical methods. The cavitation structure in the pump is captured experimentally by high-speed camera, and the PANS model is modified numerically by DCM method and FBM model. The flow modes in the cavitation development stage under the three flow rates are defined (cavitation flow mode A, B, C), and the cavity evolution, velocity distribution and vortex distribution of the three modes are further analyzed. Then the irreversible flow loss of the three modes in the impeller is analyzed by using the entropy production theory. The results show that mode B has the widest high-speed region, followed by mode C, and mode A has the narrowest high-speed region. In the low-speed region, mode A presents downstream distribution, mode B presents elongated distribution, and mode C presents disorderly distribution. In addition, mode C has a significant distribution of alternating positive and negative vorticity, followed by mode B, with mode A being the weakest while the distribution of vortex stretching and vortex expansion terms is significantly larger for mode B and mode C compared to mode A. In the impeller, the irreversible flow loss is highest in mode C, followed by mode B, and lowest in mode A.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1291 - 1307"},"PeriodicalIF":2.8,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Mechanical anchoring mechanism of prestressed bolt for rock-coal-bolt combination under uniaxial compression 单轴压缩下煤岩组合预应力锚杆机械锚固机理研究

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-10 DOI: 10.1007/s40571-024-00869-x

Tengyuan Song, Fuqiang Ren, Jun Lu, Ming Huang, Shuo Song, Chun Zhu

{"title":"Mechanical anchoring mechanism of prestressed bolt for rock-coal-bolt combination under uniaxial compression","authors":"Tengyuan Song, Fuqiang Ren, Jun Lu, Ming Huang, Shuo Song, Chun Zhu","doi":"10.1007/s40571-024-00869-x","DOIUrl":"10.1007/s40571-024-00869-x","url":null,"abstract":"<div><p>Understanding the mechanical behavior of rock-coal-bolt systems is crucial for ensuring the stability and safety of coal mine roadways. This study presents uniaxial compression tests conducted on four rock-coal-bolt (RCB) and rock-coal-prestress bolt (RCPB) combinations, each with varying interface dip angles (<i>β</i> is 15°, 30°, 45°, 60°). Through acoustic emission (AE) monitoring, the influence of prestressed and non-prestressed bolts on mechanical properties, energy dissipation, and AE entropy characteristics was analyzed. Additionally, the microscopic mechanisms of prestressed bolt reinforcement were explored using PFC2D simulations. Results demonstrate that increasing <i>β</i> leads to a shift in failure mode, transitioning from tensile-shear failure within the coal to slip failure along the interface. Prestressed bolt induces secondary stresses through tensile or bending deformation, effectively hindering shear crack propagation and controlling slip failure, thereby enhancing the overall strength of the RCPB system. Furthermore, prestressed bolt improves energy storage capacity and order stability within the rock-coal system. Numerical findings reveal a spatiotemporal evolution of contact force chains within the RCPB system, leading to the formation of a prestressed anchorage zone characterized by a concentration of high-strength and high-density compressive force chains at the rock-coal-bolt interface. This zone acts as the primary load-bearing region within the system.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1197 - 1215"},"PeriodicalIF":2.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Cross-interface propagation behavior of tension cracks during Brazilian experiments of coal–concrete bi-materials with different cementation strengths 不同胶结强度煤-混凝土双材料巴西试验中拉伸裂纹的界面扩展行为

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-10 DOI: 10.1007/s40571-024-00854-4

Xianzhong Li, Tao Wu, Zhenhua Li, Shuai Heng, Shaolei Wang, Bing Liu

{"title":"Cross-interface propagation behavior of tension cracks during Brazilian experiments of coal–concrete bi-materials with different cementation strengths","authors":"Xianzhong Li, Tao Wu, Zhenhua Li, Shuai Heng, Shaolei Wang, Bing Liu","doi":"10.1007/s40571-024-00854-4","DOIUrl":"10.1007/s40571-024-00854-4","url":null,"abstract":"<div><p>Understanding the cross-interface propagation behavior of tension cracks during hydraulic fracturing in coalbed methane exploitation involving multiple coal seams is crucial for enhancing fracturing efficiency. This study investigated the propagation behavior of cracks at the coal–concrete interface under varying interface conditions through numerical simulations and laboratory experiments. The crack propagation patterns were analyzed, and mechanical parameters were determined from laboratory experiments conducted at seven different angles. Based on the experimental results, the microparameters for the Particle Flow Code 2D were calibrated, and a numerical model for the Brazilian test of coal–concrete bi-materials using a flat-joint model was developed. Numerical simulations were conducted to examine the crack propagation patterns and processes at seven interface angles and fourteen interface cementation strengths. The results indicated that the cross-interface propagation behavior of tension cracks during the Brazilian test of coal–concrete bi-materials is significantly influenced by the interface angle and cementation strength. Crack initiation points tend to occur at the interface, within the coal, or simultaneously, depending on the interface cementation strength. The propagation behavior of cracks at the interface can be classified into three main types: pass-through, propagation along the interface, and deflection at the interface, depending on the interface angle and cementation strength. Furthermore, this study provides valuable insights for guiding hydraulic fracturing practices.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1019 - 1043"},"PeriodicalIF":2.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 impact of wall roughness on new generation cyclone performance and erosion: a numerical study 壁面粗糙度对新一代旋风分离器性能和冲蚀影响的数值研究

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-07 DOI: 10.1007/s40571-024-00861-5

Mobina Heidari, Hossein Moghadamrad, Abolfazl Mohammadebrahim

{"title":"The impact of wall roughness on new generation cyclone performance and erosion: a numerical study","authors":"Mobina Heidari, Hossein Moghadamrad, Abolfazl Mohammadebrahim","doi":"10.1007/s40571-024-00861-5","DOIUrl":"10.1007/s40571-024-00861-5","url":null,"abstract":"<div><p>In this study, the performance and erosion of new generation cyclones were evaluated under different conditions of wall roughness using computational fluid dynamics. The Navier–Stokes equations were solved using the Reynolds stress model. Additionally, the Oka model was used to predict erosion, and the discrete phase model (DPM) simulated the behavior of suspended particles. The study compared pressure contours, tangential velocity, and axial velocity across various wall roughness conditions. The impact of wall roughness on separation efficiency, pressure drop, and wall erosion was investigated, along with the effects of velocity parameters and particle diameter on wall erosion. The findings revealed a significant influence of wall roughness on cyclone behavior and performance. An increase in wall roughness from 0 to 1 mm at a velocity of 20 m/s led to a reduction in pressure drop by approximately 34.06% and separation efficiency by about 6.20%, due to enhanced friction between the vortex and the wall. Additionally, increased wall roughness reduced particle impact velocity on the cyclone wall, decreasing the erosion rate by approximately 31%. However, higher inlet velocity and larger particle diameter were found to exacerbate cyclone wall erosion.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1127 - 1138"},"PeriodicalIF":2.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Advanced hybrid modeling of alumina nanoparticle deposition patterns in heat exchangers with triangular tube models 基于三角管模型的热交换器中氧化铝纳米颗粒沉积模式的先进混合建模

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-06 DOI: 10.1007/s40571-024-00836-6

Seyed Hamed Godasiaei

{"title":"Advanced hybrid modeling of alumina nanoparticle deposition patterns in heat exchangers with triangular tube models","authors":"Seyed Hamed Godasiaei","doi":"10.1007/s40571-024-00836-6","DOIUrl":"10.1007/s40571-024-00836-6","url":null,"abstract":"<div><p>This study meticulously explores the deposition dynamics of aluminum oxide nanoparticles in a triangular tube heat exchanger to enhance heat transfer efficiency and gas dynamics, crucial for mitigating deposition risks. By investigating various parameters such as nanoparticle diameters (10–100 nm), heat flux (1000–3000 W/m<sup>2</sup>), Reynolds numbers (308–925), mass fractions (0.5–2%), and geometry lengths (50–90 mm), the research provides a comprehensive understanding. Employing Python programming, the methodology integrates machine learning algorithms (RF and DNN) with Eulerian and Lagrange methods, achieving an impressive model accuracy of 84% with low errors. Key findings include the correlation between heightened heat flux and increased nanoparticle deposition, particularly at a 100 nm diameter, and the direct relationship between mass fraction and deposition, peaking at 2% mass fraction and a 100 nm diameter. The Reynolds number significantly influences deposition, peaking with lower Reynolds numbers and larger nanoparticle diameters, shedding light on critical aspects of deposition behavior in heat exchangers. Furthermore, the research identifies tube geometry and nanoparticle size as critical factors affecting deposition patterns.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 1","pages":"737 - 758"},"PeriodicalIF":2.8,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

An updated Lagrangian particle hydrodynamics (ULPH) implementation of heat conduction model for weakly-compressive fluid 弱压缩流体热传导模型的更新拉格朗日粒子流体力学（ULPH）实现

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-04 DOI: 10.1007/s40571-024-00873-1

Junsong Xiong, Zhen Wang, Shaofan Li, Xin Lai, Lisheng Liu, Xiang Liu

引用次数: 0