Search results for: Shuixiang Li

Items from 1 to 20 out of 22 results

article

Uniform and decoupled shape effects on the maximally dense random packings of hard superellipsoids

Lufeng Liu, Zhiyuan Yu, Weiwei Jin, Ye Yuan, more

Powder Technology > 2018 > 338 > C > 67-78

The superellipsoid model is a rich geometric model and is convenient to study the particle shape effects on random packings. The particle shape significantly influences the macroscopic and microscopic structure properties of random packings. In this work, we find uniform and decoupled shape effects on the maximally dense random packings (MDRPs) of hard superellipsoids. Slightly changing the surface...

article

Shape effects on time-scale divergence at athermal jamming transition of frictionless non-spherical particles

Ye Yuan, Weiwei Jin, Lufeng Liu, Shuixiang Li

Physica A: Statistical Mechanics and its Applications > 2017 > 484 > C > 470-481

The critical behaviors of a granular system at the jamming transition have been extensively studied from both mechanical and thermodynamic perspectives. In this work, we numerically investigate the jamming behaviors of a variety of frictionless non-spherical particles, including spherocylinder, ellipsoid, spherotetrahedron and spherocube. In particular, for a given particle shape, a series of random...

article

Maximally dense random packings of intersecting spherocylinders with central symmetry

Lingyi Meng, Shuixiang Li, Xiaohu Yao

Powder Technology > 2017 > 314 > C > 49-58

The packing of rod-like particles has arisen in a variety of scientific and industrial applications. For the factors that attribute to the packing properties of such particles, elongation effect is one of the most important. However, rod-like particles can be easily assembled into non-convex shapes, in which the effects of non-convex deformations should be concerned. In this paper, the dense random...

article

Disordered packing density of binary and polydisperse mixtures of curved spherocylinders

Lingyi Meng, Shuixiang Li

Particuology > 2017 > 32 > C > 73-81

Particle elongation is an important factor affecting the packing properties of rod-like particles. However, rod-like particles can be easily bent into non-convex shapes, in which the effect of bending should also be of concerned. To explore the shape effects of elongation and bending, together with the size and volume fraction effects on the disordered packing density of mixtures of non-convex particles,...

article

Two typical structure patterns in jammed monodisperse disk packings at high densities

Ye Yuan, Weiwei Jin, Lufeng Liu, Shuixiang Li

Physica A: Statistical Mechanics and its Applications > 2016 > 461 > C > 747-755

We generate a large number of monodisperse disk packings in two dimensions via geometric-based packing algorithms including the relaxation algorithm and the Torquato–Jiao algorithm. Using the geometric-structure approach, a clear boundary of the geometrical feasible region in the order map is found which quite differs from that of the jammed region. For a certain packing density higher than 0.83,...

article

Maximally dense random packings of spherocylinders

Lingyi Meng, Yang Jiao, Shuixiang Li

Powder Technology > 2016 > 292 > C > 176-185

A spherocylinder, a convex 3D object consisting of a cylinder with two hemispherical ends, can possess a wide range of aspect ratios and is one of the most studied non-spherical particle shapes. Previous investigations on disordered spherocylinder packings yielded inconsistent packing characteristics, especially the packing density φ, indicating that density alone is not sufficient to uniquely characterize...

article

Order metrics and order maps of octahedron packings

Lufeng Liu, Peng Lu, Lingyi Meng, Weiwei Jin, more

Physica A: Statistical Mechanics and its Applications > 2016 > 444 > Complete > 870-882

We apply the ideal octahedron model and the relaxation algorithm in generating octahedron packings. The cubatic order parameter [P4]1, bond-orientational order metric Q6, and local cubatic order parameter P4local of the packings are calculated and their correlations with the packing density are investigated in the order maps. The border curve of packing density separates the geometrically feasible...

article

A novel three-dimensional mesh deformation method based on sphere relaxation

Xuan Zhou, Shuixiang Li

Journal of Computational Physics > 2015 > 298 > C > 320-336

In our previous work (2013) [19], we developed a disk relaxation based mesh deformation method for two-dimensional mesh deformation. In this paper, the idea of the disk relaxation is extended to the sphere relaxation for three-dimensional meshes with large deformations. We develop a node based pre-displacement procedure to apply initial movements on nodes according to their layer indices. Afterwards,...

article

Packing properties of binary mixtures in disordered sphere systems

Lingyi Meng, Peng Lu, Shuixiang Li

Particuology > 2014 > 16 > Complete > 155-166

Mixtures of binary spheres are numerically simulated using a relaxation algorithm to investigate the effects of volume fraction and size ratio. A complete profile of the packing properties of binary spheres is given. The density curve with respect to the volume fraction has a triangular shape with a peak at 70% large spheres. The density of the mixture increases with the size ratio, but the growth...

article

Excluded volumes of clusters in tetrahedral particle packing

Lufeng Liu, Peng Lu, Lingyi Meng, Weiwei Jin, more

Physics Letters A > 2014 > 378 > 10 > 835-838

We investigate the excluded volumes of clusters in tetrahedral particle packing using an ideal tetrahedron model and Monte Carlo simulation. Both the influences of the size and topology of clusters on the excluded volume are studied. We find that the excluded volumes of the dimer composed of two tetrahedra and the wagon wheel composed of five tetrahedra are relatively lower than other cluster forms...

article

A new mesh deformation method based on disk relaxation algorithm with pre-displacement and post-smoothing

Xuan Zhou, Shuixiang Li

Journal of Computational Physics > 2013 > 235 > Complete > 199-215

Mesh deformation is crucial to the accuracy and efficiency of the numerical simulations involving moving boundaries. In this paper, the disk relaxation algorithm and background mesh are applied to develop a new mesh deformation method. The disk relaxation algorithm rearranges the nodes in the mesh by repulsive and attractive interactions to preserve high mesh quality. With the help of background mesh,...

article

Shape and size effects on the packing density of binary spherocylinders

Lingyi Meng, Peng Lu, Shuixiang Li, Jian Zhao, more

Powder Technology > 2012 > 228 > Complete > 284-294

The shape and size of particles are the main factors which influence the packing density of binary mixtures. However, investigations of the single effect of size and shape on the binary mixtures of non-spherical particles are much absent. A systematic computational investigation on the binary packing of spherocylinders considering the single effect of shape and size respectively is carried out with...

chapter

Implementation and Design of Land Use Planning Information Issue System Based on RIA WebGIS

Jianan Luo, Xuesong Zhang, Shuixiang Li

2012 2nd International Conference on Remote Sensing, Environment and Transportation Engineering > 1 - 4

2012 2nd International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE)

Land use planning information is the basic of the publics to participate in the land use planning. Issuing the information effectively and timely and accepting publics' supervise is one of the most important approaches to make the planning success. In order to fix the shortage of the previous land use plan information issue system, this article uses the latest RIA WebGIS products, ArcGIS Server for...

article

Sphericities of non-spherical objects

Teng Li, Shuixiang Li, Jian Zhao, Peng Lu, more

Particuology > 2012 > 10 > 1 > 97-104

Sphericity, as one of the most important shape parameter for non-spherical objects, is extensively applied in evaluating the porosity or packing density of particles. In this paper, the sphericities of common non-spherical objects are deduced and investigated. Maximum sphericities and optimum shapes of these objects are presented as well. A decreasing order of sphericity from sphere (1.0) to regular...

article

Shape influences on the packing density of frustums

Jian Zhao, Shuixiang Li, Peng Lu, Lingyi Meng, more

Powder Technology > 2011 > 214 > 3 > 500-505

The shape of a frustum is a bivariate function of aspect ratio (w) and base radii ratio (c). To investigate the shape influences on the packing density of frustums, random packings of cones (c=0), truncated cones and cylinders (c=1) with various heights and diameters are studied through numerical simulations. An improved relaxation algorithm with assembly sphere models for non-spherical particles...

chapter

Design and implementation on remote control demonstration and teaching system of a fighter plane component based on ARM embedded platform

Shuixiang Li, Jianqiao Gong, Anyuan Yang, Xue Yang

2010 International Conference On Computer Design and Applications > 3 > V3-39 - V3-42

2010 International Conference on Computer Design and Applications (ICCDA 2010)

A remote control demonstration and teaching system of a fighter plane component based on ARM embedded platform is designed to meet the teaching requirement of Aeronautics & Astronautics University. This system has two parts, local keystroke monitoring & communication unit and remote communication & display unit, which are connected through TCP/IP network. The local unit will generate and...

chapter

Development of data communication system applied to electrical instruments based on USB interface

Shuixiang Li, Ying Cai

2010 International Conference On Computer Design and Applications > 4 > V4-424 - V4-428

2010 International Conference on Computer Design and Applications (ICCDA 2010)

In order to meet the requirement of large data processing and high speed data exchanging between the host computer and electrical instruments, a scenario about data communication system based on USB interface is designed and realized. The basic communication system configuration and architecture are discussed. The detail of hardware interface about a specific USB controller chip PIDUSBD12 is described...

chapter

Design and implementation on communication system of maintenance platform applied to self-propelled guns fire control and measurement system

Shuixiang Li, Jianqiao Gong, Ji Luo

2010 International Conference on Computer and Communication Technologies in Agriculture Engineering > 2 > 45 - 48

2010 International Conference on Computer and Communication Technologies in Agriculture Engineering (CCTAE 2010)

In order to fulfill the requirement of maintenance platform applied to self-propelled guns fire control and measurement system, a communication scenario based on RS-485 serials communication network is designed. Data communication between one control terminal and multi-sampling terminals can be realized. The structure of this communication system is presented, the data process flow at sampling terminals,...

article

Maximum packing densities of basic 3D objects

ShuiXiang Li, Jian Zhao, Peng Lu, Yu Xie

Chinese Science Bulletin > 2010 > 55 > 2 > 114-119

Numerical simulation results show that the upper bound order of random packing densities of basic 3D objects is cube (0.78) > ellipsoid (0.74) > cylinder (0.72) > spherocylinder (0.69) > tetrahedron (0.68) > cone (0.67) > sphere (0.64), while the upper bound order of ordered packing densities of basic 3D objects is cube (1.0) > cylinder and spherocylinder (0.9069) > cone (0...

article

A computational investigation on random packings of sphere-spherocylinder mixtures

Peng Lu, ShuiXiang Li, Jian Zhao, LingYi Meng

Science China Physics, Mechanics & Astronomy > 2010 > 53 > 12 > 2284-2292

Random packings of binary mixtures of spheres and spherocylinders with the same volume and the same diameter were simulated by a sphere assembly model and relaxation algorithm. Simulation results show that, independently of the component volume fraction, the mixture packing density increases and then decreases with the growth of the aspect ratio of spherocylinders, and the packing density reaches...

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Search results for: Shuixiang Li

Uniform and decoupled shape effects on the maximally dense random packings of hard superellipsoids

Shape effects on time-scale divergence at athermal jamming transition of frictionless non-spherical particles

Maximally dense random packings of intersecting spherocylinders with central symmetry

Disordered packing density of binary and polydisperse mixtures of curved spherocylinders

Two typical structure patterns in jammed monodisperse disk packings at high densities

Maximally dense random packings of spherocylinders

Order metrics and order maps of octahedron packings

A novel three-dimensional mesh deformation method based on sphere relaxation

Packing properties of binary mixtures in disordered sphere systems

Excluded volumes of clusters in tetrahedral particle packing

A new mesh deformation method based on disk relaxation algorithm with pre-displacement and post-smoothing

Shape and size effects on the packing density of binary spherocylinders

Implementation and Design of Land Use Planning Information Issue System Based on RIA WebGIS

Sphericities of non-spherical objects

Shape influences on the packing density of frustums

Design and implementation on remote control demonstration and teaching system of a fighter plane component based on ARM embedded platform

Development of data communication system applied to electrical instruments based on USB interface

Design and implementation on communication system of maintenance platform applied to self-propelled guns fire control and measurement system

Maximum packing densities of basic 3D objects

A computational investigation on random packings of sphere-spherocylinder mixtures

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