سال انتشار: ۱۳۹۰

محل انتشار: نوزدهمین همایش سالانه مهندسی مکانیک

تعداد صفحات: ۴

نویسنده(ها):

Ahmad Reza Rahmati – Assistant Professor, University of Kashan, Kashan
Mahmud Ashrafizaadeh – Assistant Professor, Isfahan University of Technology, Isfahan

چکیده:

In the present study, for the first time, LES of a D3Q19 Fractional Volumetric Multi-Relaxation-Time Lattice Boltzmann (FV-MRT-LB) model in conjunction with both Smagorinsky and mixed scale viscosity sub-grid closure models is applied to a three-dimensional turbulent natural convection flow in the side-heated cubic cavity at different Rayleigh numbers up to 1015 for Prantdl number of 0.71. Results show that (Hybrid Thermal) HT-FV-MRT-LB LES method produce reasonably accurate results at low Rayleigh numbers and stable results at high Rayleigh numbers