Computational Particle Mechanics最新文献

SPH simulation for 3D non-isothermal injection molding filling process using GPU acceleration 基于GPU加速的三维非等温注射成型填充过程的SPH仿真

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2025-01-03 DOI: 10.1007/s40571-024-00880-2

Yunpu Liu, Mengke Ren, Junfeng Gu, Zheng Li, Shilun Ruan, Changyu Shen

{"title":"SPH simulation for 3D non-isothermal injection molding filling process using GPU acceleration","authors":"Yunpu Liu, Mengke Ren, Junfeng Gu, Zheng Li, Shilun Ruan, Changyu Shen","doi":"10.1007/s40571-024-00880-2","DOIUrl":"10.1007/s40571-024-00880-2","url":null,"abstract":"<div><p>The nature of high viscosity and pressure in the injection molding process poses a great challenge for numerical simulation in terms of numerical stability, especially when using particle-based meshless methods. In the present work, 3D filling stage of injection molding is simulated using smoothed particle hydrodynamics (SPH) method. To counter the instability caused by high viscosity and pressure, various methods including a new non-penetration boundary treatment, modified low-dissipation Riemann solver, kernel gradient correction and particle shift technique are applied. GPU parallel computing is achieved by using Taichi language to boost computing efficiency. 3D non-isothermal injection molding process is performed for rectangular cavity, tensile test specimen and a customized transparent injection mold which we intend to perform visual injection experiment to verify our simulation in future work. The properties of flow field such as pressure and velocity are shown and compared with Moldflow simulation. The results of our simulation show good agreement with Moldflow.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1319 - 1333"},"PeriodicalIF":2.8,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919026","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 fracture energy rate for the combined finite-discrete element method 有限-离散元组合方法的断裂能率研究

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2025-01-03 DOI: 10.1007/s40571-024-00809-9

Peitao Li, Quansheng Liu, Lidan Fan, Yongqiang Yu, Feng Gao

{"title":"Investigation of fracture energy rate for the combined finite-discrete element method","authors":"Peitao Li, Quansheng Liu, Lidan Fan, Yongqiang Yu, Feng Gao","doi":"10.1007/s40571-024-00809-9","DOIUrl":"10.1007/s40571-024-00809-9","url":null,"abstract":"<div><p>In the combined finite-discrete element method, the crack element was an important bridge to realize the transition from continuous to discontinuous deformation. The crack element was assumed as a non-thickness cohesive element, which could not be tested directly. The fracture energy rate for the crack element was an essential parameter determining the deformation and fracture process during the FDEM simulation. However, the common parameter calibration method required experience and time. Thus, a new estimation method of fracture energy rate was derived based on the energy mechanism. The proposed estimation method was consistent with the Griffith fracture criterion but also can reflect the influence of mechanical and inherent properties. Then, the influence of fracture energy rate on rock strength and fracture characteristic was analysed. The results showed that both the tensile strength and uniaxial compressive strength were increased with the fracture energy rate. A smaller tensile fracture energy rate would lead to a larger ratio of tensile fracture and a decrease in shear fracture. It was opposite for the shear fracture energy rate. Based on the rock strength and fracture characteristics, the initial coefficient of fracture energy rate should be 1.0. The fracture energy rate determined by the proposed estimation method and initial coefficient was close to the optimal value, which was well verified by the laboratory test result and tunnel engineering. Finally, the improved calibration steps of fracture energy rate for the complex material were put forward, which was expected for the fast and accurate calibration of model parameters.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 1","pages":"413 - 436"},"PeriodicalIF":2.8,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553843","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

Insights into the flow characteristics during hydraulic fracturing 水力压裂过程中流体特性的深入研究

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-22 DOI: 10.1007/s40571-024-00862-4

Rezvan Abdi, Marek Krzaczek, Meisam Abdi

{"title":"Insights into the flow characteristics during hydraulic fracturing","authors":"Rezvan Abdi, Marek Krzaczek, Meisam Abdi","doi":"10.1007/s40571-024-00862-4","DOIUrl":"10.1007/s40571-024-00862-4","url":null,"abstract":"<div><p>This paper presents a numerical model to study fracture propagation during water-based hydraulic fracturing. To address the computational challenges associated with the numerical model, the proposed approach employs a set of overlapping spheres arranged in a monolayer to construct a porous specimen containing pre-existing cracks. The fluid-filled cracks represent various stages of initiation and propagation of fluid-driven fracture. The high-pressure fluid flow within the fractures is considered under isothermal conditions. Unlike the conventional focus on rock fracture analysis, the presented approach focuses on flow characteristics during fracture growth. The main objective of the presented study is to provide a detailed description of the computational fluid dynamics (CFD) aspects of fracture propagation during hydraulic fracturing to aid in calibration and validation of simplified discrete element method (DEM) models coupled with CFD representing this phenomenon. Experimental validations performed in previous studies support the model's reliability, making it useful in particular for calibration and validation of coupled 2D DEM-CFD models constructed from one layer of spheres. Obtaining experimental data for such cases is practically challenging, and the proposed model addresses the lack of reliable experimental data for hydraulic fracturing. To achieve this, representative specimens are designed, accurate simulations are conducted and precise assessments of the results are performed. Key variables such as density, pressure, velocity, porosity, and permeability were measured to facilitate the validation and calibration of future DEM-CFD studies.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1139 - 1153"},"PeriodicalIF":2.8,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40571-024-00862-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards the estimation of wall shear stress in smoothed particle hydrodynamics 光滑颗粒流体力学中壁面剪应力的估计

IF 2.8 3区工程技术

Computational Particle Mechanics Pub Date : 2024-12-15 DOI: 10.1007/s40571-024-00879-9

Sumanta Laha, Georgios Fourtakas, Prasanta Kumar Das, Amir Keshmiri

{"title":"Towards the estimation of wall shear stress in smoothed particle hydrodynamics","authors":"Sumanta Laha, Georgios Fourtakas, Prasanta Kumar Das, Amir Keshmiri","doi":"10.1007/s40571-024-00879-9","DOIUrl":"10.1007/s40571-024-00879-9","url":null,"abstract":"<div><p>Over the past few decades, smoothed particle hydrodynamics (SPH) has emerged as an alternative computational fluid dynamics (CFD) technique, yet the estimation of wall shear stress lacks adequate standardisation. Wall shear stress is a critical metric in numerous applications, and hence, this is the focus of this paper. The present study proposes a novel SPH-based method for estimating wall shear stress using velocity data from the fluid particles adjacent to the wall. Wall shear stress is then calculated at the wall based on the wall shear stress data of the neighbouring fluid particles. For laminar flow, wall shear stress is estimated directly from velocity gradients, while for turbulent flow, the Smagorinsky large eddy simulation (LES) model with eddy viscosity is used. The results obtained from the model are rigorously validated against experimental, simulation and analytical data, confirming its effectiveness across different flow conditions. This validation highlights the reliability of the proposed model for fluid dynamics and bio-fluid mechanics research.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1309 - 1317"},"PeriodicalIF":2.8,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40571-024-00879-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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

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