纳米颗粒两相流矩方法模型的研究

项目名称： 纳米颗粒两相流矩方法模型的研究

项目编号： No.10802083

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 生物科学

项目作者： 于明州

作者单位： 中国计量学院

项目金额： 24万元

中文摘要： 纳米颗粒多相流研究是目前多相流研究中新的研究方向及重点发展领域。基于本项目计划书研究内容，采用理论分析、数值计算及实验手段，重点完成如下几方面工作：（1）进一步发展了研究者及其合作者于2008年提出的TEMOM矩方法模型，使之拓展到针对全尺度及非球形颗粒动力学演变机理的研究；（2）提出了用以研究湍动剪切控制机制下的颗粒动力学演变矩方法模型，并在非稀相情况下构建了双向耦合控制方程；（3）针对带电纳米颗粒凝并行为，基于实验结果，构建了二阶张量控制模型（4）系统分析了纳米颗粒在湍动流场中的动力学演变机制，及颗粒在表面的沉积行为。通过上述研究，进一步丰富和发展了Smoluchowski平均场理论，为纳米颗粒制备过程分析及大气气溶胶演变机理研究提供了新的研究手段。但是，湍动控制机制下纳米颗粒多相流相变及颗粒增长机制下的实验研究仍不能给出用以理论分析相对应的合理结果，相关研究有待进一步实验技术的发展及相关理论分析的提高。

中文关键词： 纳米颗粒;两相流;矩方法模型

英文摘要： The study of nanoparticle-laden multiphase flow is an emerging and important research field in the multiphase flow. To deeply understand the basic interaction between two phases and especially the mechanism of their physical nature, we mainly achieved the following studies by theoretical analysis, numerical simulation and experiment supported by NSFC 10802083:(1)The TEMOM model was furhter developed and was extended to study particles covering the whole size distribution and non-sperical particles;(2)The moment model used for particle evolution dominated by turbulence shear mechanism was proposed, and the coupling model at non-dilute state for nanoparticle-laden multiphase flow was constructed;(3)Based on the experiment, the binary moment mode was proposed for charged nanoparticle coagulation process;(4)The fundamentals of evolution of nanoparticle dynamics at turbulent flows was Systematically studied as well as nanoparticle deposition on the surface of fluid. Through the above researches, we further enriched the content of Smoluchowski mean field theory and its application in nanoparticle dynamics which benefits the studies on nanoparticle synthesis at labrotary and the fundamental of aerosol evolution at atmospheric. However, nowadays, the measured technique still has no ability to give the details of nucleation and particle formation at micro-scale, especially at the presence of turbulence,which limit the development of theoretical analysis in this field. Therefore, the achievement of the study on nanoparticle-laden multiphase flow needs the further development of measured technique and the new theoritical method in the futher.

英文关键词： nanoparticle;multiphase flow; moment method