基于粒子系统的土壤胶粒快速凝聚的三维可视化仿真  

3D-Visual simulation of soil diffusion-limited colloidal aggregation based on particle system

作　　者：郑红波[1,2] 吴健平[2] 丁维龙[1] 

机构地区：[1]浙江工业大学计算机科学与技术学院,杭州310032 [2]华东师范大学地理信息科学教育部重点实验室,上海200062

出　　处：《农业工程学报》2011年第6期219-224,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(61075118);上海市科学技术委员会重大科研计划项目(07DZ12037);浙江省基金资助项目(Y1100880)

摘　　要：土壤胶体凝聚三维可视化有助于更好地理解土壤凝聚动力学过程和土壤团聚体形成。该文构建了土壤胶粒粒子系统算法,实现了土壤胶粒建模及其胶体快速凝聚动态演化可视化。首先将土壤整体当作土壤立方体,土壤胶体颗粒看作球形,实现所有胶粒的建模。然后胶粒在布朗运动作用下以扩散系数随机移动,移动后发生碰撞而快速凝聚。该文分别实现了有固定中心的单体凝聚和集团凝聚,其仿真效果良好。根据本系统进行的三维分形维数计算,其结果与分形理论相符。研究并发现分形维数随粒子浓度增大而增大,回转半径随粒子浓度增大而减小。该方法初步实现了土壤胶体快速凝聚三维可视化动态演化过程,具有一定的研究价值。Three-dimensional visualization of soil colloidal aggregation would be helpful to better understand the dynamics of soil cohesion and aggregate formation.In this paper particle system was applied to simulate soil colloidal particles and realize visualization for dynamic evolution of soil colloidal rapid condensation .Firstly,the soil as a soil cube,soil colloidal particles as sphere,all particles were used for model construction.Secondly,under the action of Brownian motion colloidal particles moved random with diffusion coefficient and aggregated when collision occurred.A fixed center of the monomer cohesion and cluster cohesion were implemented and the simulation result was satisfactory.Three-dimensional fractal dimension was calculated and the values were consistent with the fractal theory and similar research.Fractal dimension increased with the particle concentration,gyration radius decreased with the particle concentration.The method implementes visualization of soil colloid aggregation dynamic process.

关 键 词：可视化 分形 土壤 胶粒 粒子系统 快速凝聚 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]