Journal
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
Volume 30, Issue 2, Pages 855-881Publisher
EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/HFF-11-2018-0657
Keywords
Particle size distribution; Turbulent flow; Aerosol dynamics; Differentially weighted operator splitting Monte Carlo; Jet temperature and Reynolds number
Funding
- National Natural Science Foundation of China [11572274]
- General Research Fund, Research Grants Council of the Hong Kong Special Administrative Region, China [PolyU 152663/16E]
- Hong Kong Polytechnic University
- Central Research Grant of The Hong Kong Polytechnic University [4-BCD3, B-Q54U]
- Mechanical Engineering Department of The Hong Kong Polytechnic University [88Y9]
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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.
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