A coupled LES-Monte Carlo method for simulating aerosol dynamics in a turbulent planar jet
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 20 September 2019
Issue publication date: 3 February 2020
Abstract
Purpose
The purpose of this paper is to study the evolution and growth of aerosol particles in a turbulent planar jet by using the newly developed large eddy simulation (LES)-differentially weighted operator splitting Monte Carlo (DWOSMC) method.
Design/methodology/approach
The DWOSMC method is coupled with LES for the numerical simulation of aerosol dynamics in turbulent flows.
Findings
Firstly, the newly developed and coupled LES-DWOSMC method is verified by the results obtained from a direct numerical simulation-sectional method (DNS-SM) for coagulation occurring in a turbulent planar jet from available literature. Then, the effects of jet temperature and Reynolds number on the evolution of time-averaged mean particle diameter, normalized particle number concentration and particle size distributions (PSDs) are studied numerically on both coagulation and condensation processes. The jet temperature and Reynolds number are shown to be two important parameters that can be used to control the evolution and pattern of PSD in an aerosol reactor.
Originality/value
The coupling between the Monte Carlo method and turbulent flow still encounters many technical difficulties. In addition, the relationship between turbulence, particle properties and collision kernels of aerosol dynamics is not yet well understood due to the theoretical limitations and experimental difficulties. In the present study, the developed and coupled LES-DWOSMC method is capable of solving the aerosol dynamics in turbulent flows.
Keywords
Acknowledgements
This work was supported by the research studentship grant, the Central Research Grant (Project Nos. 4-BCD3 and B-Q54U) and Mechanical Engineering Department (Project No. 88Y9) of The Hong Kong Polytechnic University, the National Natural Science Foundation of China (Project no. 11572274) and the General Research Fund, Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. PolyU 152663/16E).
Citation
Liu, H. and Chan, T.L. (2020), "A coupled LES-Monte Carlo method for simulating aerosol dynamics in a turbulent planar jet", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 30 No. 2, pp. 855-881. https://doi.org/10.1108/HFF-11-2018-0657
Publisher
:Emerald Publishing Limited
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