Research on nucleation and coagulation of nanoparticles in parallel twin jets

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Research on nucleation and coagulation of nanoparticles in parallel twin jets

The large eddy simulation method has been used to simulate the diffusion of H2SO4 vapor in the parallel twin jets.The distributions of number concentration and size of nanoparticles produced by nucleation and coagulation in sulfuric acid/water system are given.The functions of the sulfur content,relative humidity and jet Reynolds number are evaluated according to the distributions of number concentration and size of nanoparticles.The results show that the nucleation in sulfuric acid/water system produces large number of nanoparticles ,and gas-to-nanoparticle conversion mostly takes place in the middle and interface of the twin jets.The coagulation process of particles reduces the number concentration,while increases the mean particle size.For the case with higher sulfur content,more number and smaller size nanoparticles are produced by nucleation and coagulation.There is also a larger number of nanoparticles for the cases with higher relative humidity and jet Reynolds number.

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作 者: YIN Zhao-qin LIN Jian-zhong ZHOU Kun  
作者单位:YIN Zhao-qin,LIN Jian-zhong(Institute of Fluid Engineering,Department of Mechanics,Zhejiang University,Hangzhou 310027,P.R.China;China Jiliang University,Hangzhou 310018,P.R.China)
+S(]pq5we3_2s,W0ZHOU Kun(Institute of Fluid Engineering,Department of Mechanics,Zhejiang University,Hangzhou 310027,P.R.China) 
刊 名:应用数学和力学(英文版)  EI SCI
英文刊名:APPLIED MATHEMATICS AND MECHANICS 
年,卷(期):2008 29(2) 
分类号:O359 
关键词:nanoparticle   twin jets   nucleation   coagulation   numerical calculation  
机标关键词:relative humidityReynolds numbersulfur contentsulfuric acidlarge eddy simulationcoagulation processparticle size 
基金项目:National Major Basic Research Special Foundation of China 
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