| NUMERICAL SIMULATION OF THE GROWTH OF NANOPARTICLES IN A FLAME CVD PROCESS |
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| 作者姓名： | LixiWang SiChen HongyongXie |
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| 作者单位： | CenterforNanomaterialsandScience,DalianUniversityofTechnology,Dafian116012,P.R.China |
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| 摘 要： | The growth of titania nanoparticles in a flame CVD process has been simulated by computational fluid dynamics, based on the change rate of particle number density due to their collisions calculated from an integral collision kernel. The assumptions made on constant particle volume density nv (nd^3), constant density of particle surface area ns (nd^2), and constant entity nd^2.5 in coagulation process have been examined. Comparisons have been made on particle size distribution between measurement results and predictions from present model of particle growth and Kruis model of particle dynamics for titania nanoparticles synthesized by the flame CVD process. Effects of operational parameters such as O2 mole fraction and particle number density on mean particle size and size distribution have been discussed.
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| 关 键 词： | 纳米结构 生长率 二氧化钛 计算机仿真 CVD |
NUMERICAL SIMULATION OF THE GROWTH OF NANOPARTICLES IN A FLAME CVD PROCESS |
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| LixiWang SiChen HongyongXie.NUMERICAL SIMULATION OF THE GROWTH OF NANOPARTICLES IN A FLAME CVD PROCESS[J].China Particuology,2004,2(5):215-221. |
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| Authors: | Lixi Wang Si Chen and Hongyong Xie Center for Nanomaterials and Science Dalian University of Technology Dalian P R China Author to whom correspondence should be addressed E-mail: hyxie@com |
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| Institution: | Lixi Wang,Si Chen and Hongyong Xie* Center for Nanomaterials and Science,Dalian University of Technology,Dalian 116012,P. R. China *Author to whom correspondence should be addressed. E-mail: hyxie@163.com |
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| Abstract: | The growth of titania nanoparticles in a flame CVD process has been simulated by computational fluid dynamics, based on the change rate of particle number density due to their collisions calculated from an integral collision kernel. The assumptions made on constant particle volume density nv (nd3), constant density of particle surface area ns (nd2), and constant entity nd2.5 in coagulation process have been examined. Comparisons have been made on particle size distribution between measurement results and predictions from present model of particle growth and Kruis model of particle dynamics for titania nanoparticles synthesized by the flame CVD process. Effects of operational parameters such as O2 mole fraction and particle number density on mean particle size and size distribution have been discussed. |
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| Keywords: | nanoparticles growth titania flame CVD simulation |
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