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CLC number: TQ038.3

On-line Access: 2012-05-04

Received: 2011-12-13

Revision Accepted: 2012-02-06

Crosschecked: 2012-04-05

Cited: 3

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2012 Vol.13 No.5 P.361-374

http://doi.org/10.1631/jzus.A1100338


Modeling droplet vaporization and combustion with the volume of fluid method at a small Reynolds number


Author(s):  Xiao-bin Zhang, Wei Zhang, Xue-jun Zhang

Affiliation(s):  Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   xuejzhang@zju.edu.cn

Key Words:  Droplet, Vaporization, Combustion process, Volume of fluid (VOF), Numerical simulation


Xiao-bin Zhang, Wei Zhang, Xue-jun Zhang. Modeling droplet vaporization and combustion with the volume of fluid method at a small Reynolds number[J]. Journal of Zhejiang University Science A, 2012, 13(5): 361-374.

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author="Xiao-bin Zhang, Wei Zhang, Xue-jun Zhang",
journal="Journal of Zhejiang University Science A",
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pages="361-374",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1100338"
}

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%T Modeling droplet vaporization and combustion with the volume of fluid method at a small Reynolds number
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%A Xue-jun Zhang
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%V 13
%N 5
%P 361-374
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%D 2012
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1100338

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T1 - Modeling droplet vaporization and combustion with the volume of fluid method at a small Reynolds number
A1 - Xiao-bin Zhang
A1 - Wei Zhang
A1 - Xue-jun Zhang
J0 - Journal of Zhejiang University Science A
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SP - 361
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Y1 - 2012
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1100338


Abstract: 
The volume of fluid (VOF) formulation is applied to model the combustion process of a single droplet in a high-temperature convective air free stream environment. The calculations solve the flow field for both phases, and consider the droplet deformation based on an axisymmetrical model. The chemical reaction is modeled with one-step finite-rate mechanism and the thermo-physical properties for the gas mixture are species and temperature dependence. A mass transfer model applicable to the VOF calculations due to vaporization of the liquid phases is developed in consideration with the fluctuation of the liquid surface. The model is validated by examining the burning rate constants at different convective air temperatures, which accord well with experimental data of previous studies. Other phenomena from the simulations, such as the transient history of droplet deformation and flame structure, are also qualitatively accordant with the descriptions of other numerical results. However, a different droplet deformation mechanism for the low Reynolds number is explained compared with that for the high Reynolds number. The calculations verified the feasibility of the VOF computational fluid dynamics (CFD) formulation as well as the mass transfer model due to vaporization.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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