摘要
探讨了气凝胶形成过程的分形动力学特征，在扩散限制集团凝聚（ＤＬＣＡ）模型的基础上，考虑溶胶粒子的密度和能量分布对凝胶化过程的影响，建立了关于气凝胶分形结构生长机制的溶胶活性粒子模型．利用Ｃ语言编制了模拟凝胶生长过程的软件，该软件具有图形模拟和数值模拟两种功能，主要输入参数为溶胶粒子密度和溶胶反应的活化能以及图形边界条件，当模拟凝聚到一定程度时，软件可自动存储图形数据．利用该软件对气凝胶的分形生长过程进行模拟，得到了形成凝胶的各阶段分形图像，以及凝胶分形维数的变化，确定了气凝胶分形结构生长的两种模式．
The fractal characteristics of aerogels structure was studied. The model of activity particles in sol was established based on the Diffusion Limited Cluster Cluster Aggregation(DLCA) model. Considered are the influences of the density and energy distribution of sol particles on the initial state of sol gel process. The C language is used with two kinds of functions, corresponding to the graphical and numerical representation. The input parameters are the particles density of sol and the activity energy of sol gel reaction in addition to the edge conditions. The gel morphology was obtained for different stages of the sol gel process. Two growing modes of aerogel were found.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1999年第6期68-71,共4页
Journal of Xi'an Jiaotong University
基金
陕西省自然科学基金
西安交通大学科学研究基金
