Title of article :
Investigation of particle deposition and dispersion using hybrid LES/RANS model based on lattice Boltzmann method
Author/Authors :
Sajjadi, H Department of Mechanical Engineering - Faculty of Engineering - University of Bojnord - Bojnord, Iran , Salmanzadeh, M Department of Mechanical Engineering - Shahid Bahonar University of Kerman - Kerman, Iran , Ahmadi, G Department of Mechanical and Aeronautical Engineering - Clarkson University - Potsdam - NY, USA , Jafari, S Department of Petroleum Engineering - Shahid Bahonar University of Kerman - Kerman, Iran
Abstract :
In this study, a new hybrid RANS/LES turbulence model within the framework of the Multi Relaxation Time (MRT) Lattice Boltzmann Method (LBM) was used to study
particle dispersion and deposition in a room. For the hybrid RANS/LES method, the nearwall
region was simulated by the RANS model, while the rest of the domain was analyzed
using the LES model within the framework of the LBM. In the near-wall layer where RANS
was used, the k " turbulence model was employed. To simulate the particle dispersion
and deposition in the room, particles with diameters of 10 nm to 10 m were investigated.
The simulated results for particle dispersion and deposition showed that the predictions
of the present hybrid method were quite similar to those of earlier LES-LBM. In addition,
the predictions of the hybrid model for the particle deposition and dispersion were closer
to LES simulation results, as compared to those of the k " model.
Keywords :
Hybrid RANS/LES , LBM , Particle deposition , Particle dispersion
Journal title :
Scientia Iranica(Transactions B:Mechanical Engineering)
