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高温微纳颗粒动力学
10/28
2021
Seminar
- Title 高温微纳颗粒动力学
- Speaker 张易阳 （清华大学）
- Date 2021年10月28日 14:00-16:00
- Venue 中科院理论物理所新楼6620 https://meeting.tencent.com/dm/ub24JnyIt3xd
Abstract
微纳颗粒的动力学行为是能源动力、材料合成、大气环境等领域共同关注的科学问题。在高温反应流中，微纳颗粒的生成、长大和输运等主要过程包括如下特有现象：化学反应和核化（均相和异相）主导的气相向颗粒的转化（gas-to-particle transformation）；布朗运动主导的纳米颗粒碰撞-聚并（collision-coalescence）;扩散、热泳、惯性等多机制联合主导的微纳颗粒沉积等。本报告将介绍课题组针对高温微纳颗粒动力学的几个关键问题开展的研究工作：1）复杂相互作用下纳米颗粒的聚并和沉积动力学；2）反应流中气相向颗粒转化的在线诊断新光谱PS-LIBS；3）非球形粘附性颗粒碰撞的动态能量耗散。
参考文献：
1. Zhang, Y., Li, S., Yan, W., Yao, Q., & Tse, S. D. (2011). Role of dipole–dipole interaction on enhancing Brownian coagulation of charge-neutral nanoparticles in the free molecular regime. The Journal of chemical physics, 134(8), 084501.
2. Zhang, Y., Li, S., Yan, W., & Yao, Q. (2012). Nanoparticle transport and deposition in boundary layer of stagnation-point premixed flames. Powder technology, 227, 24-34.
3. Zhang, Y., Li, S., Ren, Y., Yao, Q., & Law, C. K. (2014). Two-dimensional imaging of gas-to-particle transition in flames by laser-induced nanoplasmas. Applied Physics Letters, 104(2), 023115.
4. Ren, Y., Li, S., Zhang, Y., Stephen, D. T., & Long, M. B. (2015). Absorption-ablation-excitation mechanism of laser-cluster interactions in a nanoaerosol system. Physical review letters, 114(9), 093401.
5. Fang, Z., Zhang, Y., Wei, M., Zhao, S., Wu, X., & Sun, L. (2020). A numerical study on adhesive collision between a micro-sized particle and a wall. Powder Technology, 360, 769-779.
6. Ren, Y., Zhang, Y., Mao, Q., & Pitsch, H. (2020). Amorphous-to-Crystalline Transition during Sintering of Nascent TiO2 Nanoparticles in Gas-Phase Synthesis: A Molecular Dynamics Study. The Journal of Physical Chemistry C, 124(50), 27763-27771.
参考文献：
1. Zhang, Y., Li, S., Yan, W., Yao, Q., & Tse, S. D. (2011). Role of dipole–dipole interaction on enhancing Brownian coagulation of charge-neutral nanoparticles in the free molecular regime. The Journal of chemical physics, 134(8), 084501.
2. Zhang, Y., Li, S., Yan, W., & Yao, Q. (2012). Nanoparticle transport and deposition in boundary layer of stagnation-point premixed flames. Powder technology, 227, 24-34.
3. Zhang, Y., Li, S., Ren, Y., Yao, Q., & Law, C. K. (2014). Two-dimensional imaging of gas-to-particle transition in flames by laser-induced nanoplasmas. Applied Physics Letters, 104(2), 023115.
4. Ren, Y., Li, S., Zhang, Y., Stephen, D. T., & Long, M. B. (2015). Absorption-ablation-excitation mechanism of laser-cluster interactions in a nanoaerosol system. Physical review letters, 114(9), 093401.
5. Fang, Z., Zhang, Y., Wei, M., Zhao, S., Wu, X., & Sun, L. (2020). A numerical study on adhesive collision between a micro-sized particle and a wall. Powder Technology, 360, 769-779.
6. Ren, Y., Zhang, Y., Mao, Q., & Pitsch, H. (2020). Amorphous-to-Crystalline Transition during Sintering of Nascent TiO2 Nanoparticles in Gas-Phase Synthesis: A Molecular Dynamics Study. The Journal of Physical Chemistry C, 124(50), 27763-27771.