DIRECT NUMERICAL SIMULATION OF TURBULENT RAYLEIGH-BÉNARD CONVECTION IN A SLIGHTLY TILTED CYLINDRICAL CONTAINER

St. Petersburg Polytechnical University Journal: Physics and Mathematics

Smirnov Sergei¹  Smirnov Evgeny¹ 

[1] Peter the Great St. Petersburg Polytechnic University;

关键词: rayleigh – bénard convection;    tilted container;    turbulence;    direct numerical simulation;    large-scale circulation;   

DOI  :  10.18721/JPM.13102

来源: DOAJ

【 摘 要 】

Results of direct numerical simulation of turbulent convection in a cylindrical container heated from below are presented. The height-to-diameter ratio is equal to 1.0. The calculations are performed for mercury (Pr = 0.025) at Ra = 10^6 and water (Pr = 6.4) at Ra = 10^8. To prevent azimuthal motion of the global vortex (large-scale circulation) developing in the container, it is tilted by a small angle with respect to the gravity vector. Structure of the time-averaged flow pattern symmetrical with respect to the central vertical plane is analyzed. Peculiarities of vortex structures developing in the corner zones are highlighted. Representative profiles of the Reynolds stresses and components of the turbulent heat flux vector are given for the central vertical plane.

【 授权许可】

Unknown