期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到5篇文章
< 1 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Comparison and applications of solid weighting functions for fluid-particle modeling using the lattice Boltzmann-discrete element coupling method 认领 引用
1
作者 Duo Wang Yuman Han +5 位作者 Yi Zheng Songyan Wang Xiaofang Jiang Shiyi Jiang Mengdi Sun Zhejun Pan 《Theoretical & Applied Mechanics Letters》 EI CAS CSCD 2026年第3期73-82,共10页
This paper presents a comparative study of the solid weighting functions within the text of the modified partially saturated method(MPSM),which is an effective fluid-solid boundary condition in the lattice Boltzmann-d... This paper presents a comparative study of the solid weighting functions within the text of the modified partially saturated method(MPSM),which is an effective fluid-solid boundary condition in the lattice Boltzmann-discrete element coupling method(LBM-DEM).In its original form,the solid weighting function is τ-dependent.Previous studies have shown that the computational drag is viscosity-dependent when using the τ-dependent solid weighting function to solve fluid-particle interactions.To address this issue,two modified solid weighting functions,namely,the higher-order function and the solid-coverage function,are proposed.Nevertheless,the literature lacks a comparison of these functions,especially for viscosity dependence.In this study,the solid weighting functions are implemented and tested through two benchmark multiphase configurations,i.e.,a sphere settling between two parallel plates and the‘drafting,kissing and tumbling’of two settling spheres.The computational accuracy,viscosity dependence and convergence of the two modified functions are validated and compared against the original τ-dependent function.The LBM-DEM-MPSM formulation is then applied to study the settling behavior of a particle pack with varying solid fractions in a narrow fracture,which highlights the potential of employing the LBM-DEM-MPSM approach to a broader range of fluid-particle systems. 展开更多
关键词 Lattice boltzmann method Discrete element method Fluid-solid boundary conditions Fluid-particle interaction particle settling
暂未订购 下载PDF
Petrophysical Characteristics of Silurian Mudstones from Central Taurides in Southern Turkey 认领 引用
2
作者 Zeynep Döner Qinhong Hu +3 位作者 Mustafa Kumral Md Golam Kibria Hongguo Qiao Mengdi Sun 《Journal of Earth Science》 SCIE CAS CSCD 2021年第4期778-798,共21页
This study used a range of integrated and complementary experiments to examine porestructure,fluid-shale wetting characteristics,sample size-dependent porosity towards different fluids,and imbibition behavior,as well ... This study used a range of integrated and complementary experiments to examine porestructure,fluid-shale wetting characteristics,sample size-dependent porosity towards different fluids,and imbibition behavior,as well as the relationships between these properties and the mineralogy of Silurian mudstones in the Central Taurides of Turkey.Working with different sample-sizes,the experiments consisted of helium pycnometry,low-pressure nitrogen physisorption isotherm,mercury intrusion porosimetry,fluid immersion porosimetry,liquid displacement,fluid droplet wettability and contact angle measurements,and spontaneous imbibition of fluids;four fluids with different hydrophilicity were used to assess the characteristics of fluid-shale interaction and its influence on porestructure.Results show that studied mudstones can be grouped into three rock types:siliceous,carbonate-dominated,and mixed mudstones.Siliceous and mixed mudstones have higher porosities,pore-throat diameters,surface areas and tortuosities than the carbonate-dominated mudstones,regardless of sample sizes and fluids used.With low permeabilities and medium pore-throat sizes for the siliceous and mixed mudstones,the wettability and imbibition results show that these mudstones are both oil-wet and moderately-to-high water-wet.In contrast,the carbonate-dominated mudstones exhibit oil-wet characteristics.These results indicate that studied siliceous and mixed mudstones in the Central Taurides seem to have appropriate petrophysical properties in the context of reservoir quality. 展开更多
关键词 Silurian mudstones Central Taurides of Turkey petrophysical properties pore structure connectivity fractal dimension
暂未订购 下载PDF
Toward photocatalytic hydrogen generation over BiVO4 by controlling particle size 认领 引用 被引量：6
3
作者 Mengdi Sun Zemin Zhang +3 位作者 Qiujin Shi Jianlong Yang Mingzheng Xie Weihua Han 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第8期2419-2422,共4页
Owing to excellent light absorption and high activity fo r oxygen evolution,monoclinic bismuth vanadate(BiVO4) is regarded as an ideal candidate for photocatalytic water splitting.However,its application is limited... Owing to excellent light absorption and high activity fo r oxygen evolution,monoclinic bismuth vanadate(BiVO4) is regarded as an ideal candidate for photocatalytic water splitting.However,its application is limited by the large particle size in micrometer scale,as well as the slightly positive conduction band.In this work,we successfully synthesized nano-BiVO4 with particle size ranged from 27 nm to 57 nm by wet chemical method based on electrostatic spinning method.Unlike bulk BiVO4,the nano-sized BiVO4 possesses the ability to generate hydrogen by water splitting,and the activity could reach up to1.66 μmol h-1 g-1 with the assistance of Pt.The enhanced activity is mainly attributed to the improvements resulted from reduced particle size,which includes elevated conduction band,enlarged specific surface area and promoted charge separation.This work provides a simple method for synthesizing photocatalyst with small particle size and high yield. 展开更多
关键词 Nano-sized bismuth vanadate Electrospinning process Charge carrier separation Elevated conduction band Water splitting
暂未订购 下载PDF
交通系统运营可靠性研究方法综述 认领 引用
4
作者 孙梦迪 张毅 《计算机科学与应用》 2020年第12期2270-2273,共4页
在对国内外交通系统运营可靠性分析和研究的基础上,论述了目前有代表性的可靠度指标的定义和研究方法,如连通可靠度、时间可靠性、服务水平可靠度等,并讨论了该领域研究所存在的局限性,最后对在交通系统运营下的可靠性分析进行了展望。
关键词 交通系统运营 可靠性分析 局限性 应用前景
暂未订购 下载PDF
Reservoir characteristics and well-logging evaluation of the Lower Cambrian shales in southeast Chongqing, China 认领 引用 被引量：3
5
作者 Xiaomeng Cao Bingsong Yu +2 位作者 Xintong Li Mengdi Sun Ling Zhang 《Petroleum Research》 EI 2016年第2期178-190,共13页
To accurately identify the reservoir characteristics and main controlling factors of the Cambrian Niutitang black shale in the southeast Chongqing,a series of systematic measurements were conducted on core samples fro... To accurately identify the reservoir characteristics and main controlling factors of the Cambrian Niutitang black shale in the southeast Chongqing,a series of systematic measurements were conducted on core samples from Well Yuke-1 and Well Youke-1.The measurements include clay mineral analysis,XRD analysis,petrophysical properties,specific surface area,pore diameter and TOC,as well as Ro and maceral compositions.The Niutitang shale reservoir contains detrital minerals and clay minerals averagely of 51.34%and 32.74%,respectively.The average effective porosity and permeability are 1.2%and 8.0×10-3mD,respectively,typically of ultra-low porosity and permeability.Mesopores are dominant,accounting for approximately 73%of the total pore volume.The average BET specific surface area is 7.75m2/g and the average pore diameter is 5.3nm.The average TOC is 2.29%and the average Ro is 3.12%,indicating that the organic matter is in over-maturity stage.Statistical analyses of the measurements show that the micropore volume is positively correlated with TOC but negatively correlated with the total content of clay minerals;the mesopore volume is positively correlated with TOC,the total content of clay minerals and the content of carbonate minerals;the macropore volume is positively correlated with TOC and the content of carbonate minerals,weakly positively correlated with the content of detrital minerals but negatively correlated with the total content of clay minerals.The porosity and TOC of the Niutitang shale are computed using the conventional well-logging method for the Yuke-1 and Youke-1 wells,and the porosities are quite consistent with the core analysis resultsr,but in the shallow reservoir that contains no oil and gas,the TOC exhibits no correlation with the core analysis results. 展开更多
关键词 shale reservoir characteristics well logging multiple linear regression Niutitang Formation
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈