| 报告题目 | 复杂流体环境中颗粒成核过程的高性能计算模拟 |
| 报告人 | Dr. LIU Jun |
| 报告人单位 | Division of Engineering and Applied Sciences, Caltech |
| 报告时间 | 2014-12-27 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室(9004室) |
| 主办单位 | 合肥微尺度物质科学国家实验室、中国科学技术大学化学物理系 |
| 报告介绍 | Abstract:
Particle formation process via gas-to-particle conversion (nucleation) within complex flow systems is critical for environmental aerosol generations, as well as in many industrial applications. The main concern is the entangled interaction of fluid dynamic and particle nucleation, where the later is highly sensitive to accurately predicting both thermal and chemical transports within the flows. For practical-scale systems, a complete coupling of fluid and nucleation is still absent up-to-date, mostly due to computational techniques and cost. The focus of this work is to investigate particle nucleation within three-dimensional jet flows, both laminar and turbulent, and via direct numerical simulations. In this talk I will start by incorporating a recently developed size-dependent surface tension nucleation theory with computational fluid dynamics, probing metal particle nucleation within simple physics flows. Then I will discuss the effects of fluid turbulence on metal nucleation in turbulent jet flows. Then I will present effects of heat release on DBP nucleation in both laminar and turbulent flows. This work probes physical processes coupled with fluid transport phenomena, and the goal is to obtain a more accurate understanding and description of particle nucleation and growth mechanism in complex flow systems, such as formation of haze in the atmosphere. |
