| 1. | The analysis method of failure by particle impact
颗粒碰撞失效分析 |
| 2. | The particle collision frequencies and granular temperature as a function of particle concentration were obtained
得到了颗粒碰撞频率和颗粒温度随颗粒浓度的变化规律。 |
| 3. | The radial distribution function was introduced in order to take into account the effect of the uneven local particle concentration on the particle collision probability
推导了高颗粒浓度气固两相流颗粒间碰撞概率的计算公式,引入径向分布函数来考虑局部颗粒浓度不均匀性对颗粒碰撞概率的影响。 |
| 4. | By introducing the diffusion caused by sediment colliding , the diffusion theory is revised , and the equation for sediment concentration distribution is derived from theory analysis
进而在引入颗粒碰撞扩散的基础上，对泥沙颗粒扩散理论进行修正，从而在理论上得到了挟沙水流泥沙含量分布规律的公式。 |
| 5. | However , the effect of high particle concentration on particle collision should be taken into account in the dense gas - solid two - phase flow . at the same time , gas turbulence should be taken into account in the simulation of gas flow in dense gas - solid two - phase flow
然而,在高颗粒浓度下颗粒碰撞对的确定需要考虑高颗粒浓度存在的影响,同时在高颗粒浓度流化床气固两相流动中,需要考虑气体粘性的作用。 |
| 6. | I think that the filth dropout from surface of filter comes from synthetical action of the particles collide and current sheer ad put forward the most efficient outwash style and outwash coefficient in produce technology and it can use as technology f reference in practical application
认为污物由滤料表面脱落是颗粒碰撞和水流剪切两者综合作用的结果。并提出了针对生产工艺最有效的冲洗方式和冲洗参数，可作为实际运行工艺参考。 |
| 7. | We successfully apply the two - fluid model ( tfm ) to the study of two dimensional and three dimensional dense gas - solid flow characteristics . the results show some rules on the particle collisions and gas particle interactive influence of the vertical upward pipe
在对高浓度气固两相流的研究中，成功的运用双流体模型对两维和三维垂直立管段进行了研究，揭示了垂直立管内的高浓度气固流动的颗粒碰撞以及气相和颗粒相的相互影响的一些规律。 |
| 8. | Then we apply the approach of direct particle simulation ( dps ) to the simulation of soft sphere model and hard sphere model by innovatively combining the different method of dealing the particle collision algorithm of hard and soft sphere model . we also calculate the different cases with the two approaches
接着运用颗粒相直接模拟思想，大胆地鞣和了国内外学者关于软颗粒、硬颗粒模型对颗粒碰撞计算的不同方法，分别用软、硬颗粒模型计算了不同的例子。 |
| 9. | In this paper , to investigate the coagulation process of inorganic suspended particles ( isp ) , online monitoring of the coagulation process was conducted by using pda2000 . the process of floe formation and the morphological characteristics of floes were investigated in detail through tv - microscope . the mechanism of partical collision and coagulation kinetics were preliminary discussed
为了考察无机悬浮颗粒体系的混凝过程，研究絮凝体的构造特征，本文通过pda2000对无机悬浮体系的混凝进行光学在线监测，运用电视显微摄像仪对絮凝体的形成过程及其形态学特性进行了系统的研究，对胶体颗粒碰撞机制及混凝动力学作了初步探讨。 |
| 10. | By making some assumptions , collision frequency were presented . then the the flocculation kinetics model was established through population balance equation . comparison of experimental data and modeling results indicate that there are the same trend between the two . so the model can predict floes number and size during flocculation of yellow river ' s loess particles without using empirical parameters . the tem and sem were used to obsever floes in the study of floe structure . the flocculation was divided as flocculi , floc and floe aggregate . the floes structure model was established by assumption that particles position in floe accords with tetrahedron . the fractal dimension of model and experimental floes was found to be coincidentso the model can reflect the structure of flocs formed in flocculation of yellow river ' s loess particles by macromolecule flocculant at a certain extent
最后，本文还对絮凝动力学和絮体结构进行了研究，在前人研究的基础上，针对高分子絮凝黄河泥沙，对絮凝过程作了一些符合试验条件的假设，建立了颗粒碰撞频率表达式，应用了颗粒数量平衡方程，从而建立了絮凝过程的动力学生长模型，模型计算结果与试验数据对比表明，二者趋势一致，在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程；对絮体结构的研究中，应用扫描电子显微镜和透射电子显微镜对絮体进行了观察，将絮体分为絮粒、絮团和絮网三个不同的生长阶段，通过假设颗粒结合位置符西安建筑科技大学博士学位论文合正四面体，建立了絮体结构模型，计算得到的模型絮体分形维数基本与试验中的实际絮体相符，在一定程度上能够反映高分子絮凝黄河泥沙生成的絮体结构。 |
