Aerosol Coagulation and Morphology Studies

叙述：建议研究细颗粒的凝聚 气溶胶使用静态和动态光散射和电子 显微镜检查 目标是： L. 以确定是否适用于 分形概念描述 气溶胶粒子形态学和如何 这种分形形态取决于 克努森数 交互，以及并发 表面生长 2. 要测试 气溶胶的凝结增长 整个努森政权， 确定的依赖性 凝固核均匀性和 动态分形维数 克努森数 交互，以及并发 表面生长 3. 为了测量一个 任意气溶胶粒径 自我保护的分配 形成和研究的影响 分形形态学 测量. 4. 为了测量凝血速度 在努森政权的中期 在液体和固体颗粒中 气溶胶 5. 来描述 气溶胶凝聚，并确定其 对凝固生长的影响。 气溶胶将由油滴（DOP）或固体产生 (NaCl，Ag）和来自预混火焰的烟灰。 尺寸将在 凝固前5-100 nm范围。 对气溶胶的认识 混凝，其速率和时间演变，以及其对 由此产生群集形态将有助于我们的基本 了解气溶胶和凝结过程。

Narrative: It is proposed to study coagulation of fine particle aerosols using static and dynamic light scattering and electron micrography inspection. The goals are: l. To determine the applicability of the fractal concept to describe aerosol particle morphology and how this fractal morphology depends on Knudsen number, particle interactions, and concurrent surface growth. 2. To test temporal scaling of the coagulative growth of aerosols in the entire Knudsen regime and determine the dependence of the coagulation kernel homogeneity and dynamic fractal dimension on Knudsen number, particle interactions, and concurrent surface growth. 3. To measure the approach of an arbitrary aerosol particle size distribution to the self-preserving form and study the effects of fractal morphology on the measurement. 4. To measure the rate of coagulation in the intermediate Knudsen regime in both liquid and solid particle aerosols. 5. To characterize the phenomenon of aerosol clumping and determine its effect on coagulative growth. Aerosols will be created from either oil droplets (DOP) or solids (NaCl, Ag) and soot from premixed flames. Sizes will be in the 5-100 nm range before coagulation. An understanding of aerosol coagulation, its rate and temporal evolution, and its effect on the resultant cluster morphology will help our fundamental understanding of aerosols and the coagulative process.