中文摘要：

在有硫磺的酸蒸汽二进制代码系统的混合的层的 nanoparticle 成核和凝结的数字模拟用大旋涡模拟和时刻的直接的照方法被执行。nanoparticles 的数字集中，体积集中，和平均直径的分布被获得。结果证明协调结构经由连续地把 nanoparticles 搬运并且扩散到低粒子集中的区域在数字集中，体积集中和 nanoparticles 的平均直径的分布上有重要效果。在 streamwise 方向， nanoparticles 的数字集中减少，当体积集中和平均直径增加时。数字集中，体积集中和 nanoparticles 的平均直径的分布是空间地不同类的。成核的典型时间比凝结的短。因为 nanoparticles 的数字集中在哪儿高，当凝结的紧张主要是时，由数字集中影响了，成核更容易发生在低温度的区域。在 nanoparticles 的平均直径的变化的成核和凝结结果。关键词 Nanoparticles - 成核 - 凝结 - 混合层 - 工程被中国(10632070 ) 的国家自然科学基础的主要节目支持的时刻的直接的照方法。

英文摘要：

Numerical simulation of nanoparticle nucleation and coagulation in a mixing layer with sulfuric acid vapor binary system is performed using the large eddy simulation and the direct quadrature method of moment. The distributions of number concentration, volume concentration, and average diameter of nanoparticles are obtained. The results show that the coherent structures have an important effect on the distributions of number concentration, volume concentration and average diameter of nanoparticles via continuously transporting and diffusing the nanoparticles to the area of low particle concentration. In the streamwise direction, the number concentration of nanoparticles decreases, while the volume concentration and the average diameter increase. The distributions of number concentration, volume concentration and average diameter of nanoparticles are spatially inhomogeneous. The characteristic time of nucleation is shorter than that of coagulation. The nucleation takes place more easily in the area of low temperature because where the number concentration of nanoparticles is high, while the intensity of coagulation is mainly affected by the number concentration. Both nucleation and coagulation result in the variation of average diameter of nanoparticles.