改进的Dillmann-Meier自发凝结模型探讨  

Modified Dillmann-Meier model of homogenous nucleation

作　　者：代玉强[1] 胡大鹏[1] 邹久朋[1] 

机构地区：[1]大连理工大学化工学院,辽宁大连116012

出　　处：《化学工程》2009年第12期43-46,共4页Chemical Engineering(China)

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA05Z216)

摘　　要：考虑单分子聚团间相互作用下,Dillmann-Meier模型冷凝成核率结果较为准确,然而该模型运算量较大,不能适应于含有凝结现象的流动过程分析中。文中在Dillmann-Meier模型基础上,给出了改进后的模型,将不同理论用于计算水和n-C9的成核率结果与所有理论模型和实验结果进行比较,表明改进后的MDM模型精度接近Dillmann-Meier模型但运算更快捷。通过对尺寸校正函数研究了不同温度、过饱和度对微观表面张力的影响,分析了造成不同理论计算成核率存在差别的主要原因。Based on the Dillmann-Meier droplet model, a modified semi-phenomenological model of homogenous nucleation was proposed by modifying Dillmann-Meier model in consideration of imperfect behavior of real gas without neglecting any monomer-monomer interaction. The prediction of the modified Dillmann-Meier （MDM） and other various models for n-C9 and water were compared with available experimental data, and it follows that the MDM model has a similar precision with the Dillmann-Meier model. By means of surface energy correction function under the conditions of various temperature and supersaturation, the microscopic surface tension was studied and the main reason of difference between nucleation rates calculated from various models was also analyzed.

关 键 词：表面张力 自发凝结 成核率 

分 类 号：O641.1[理学—物理化学]