Modeling of Generation and Growth of Non-Spherical Nanoparticles in a Co-Flow Flame |
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| Authors: | Kim HJ Jeong JI Park Y Yoon Y Choi M |
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| Institution: | (1) National CRI Center for Nano Particle Control, Institute of Advanced Machinery and Design, Seoul National University, Seoul, 151-742, South Korea;(2) School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, South Korea |
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| Abstract: | Generation and growth of polydisperse non-spherical silica nanoparticles in an oxy-hydrogen co-flow diffusion flame have been simulated for the first time. A complete set of Navier–Stokes equations describing multi-component chemically-reacting fluid flows was first solved considering the detailed H2/O2 chemistry and oxidation/hydrolysis reactions of SiCl4. A recently developed aggregate sectional model (Jeong & Choi, 2001) was employed to solve the dynamics of particles undergoing generation, convection, diffusion, coagulation and coalescence in a spatially two-dimensional flame system. Non-uniform spatial distributions of flame temperatures and non-spherical particle sizes were successfully simulated. Comparison on flame temperature and particle size between the numerical simulation and the experimental data has also been done. Performance of a simple monodisperse model was also studied by comparing with the detailed sectional model. |
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| Keywords: | co-flow flame H2/O2 combustion nanoparticles sectional model sintering |
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