Flow structure and heat transfer around the cube

Abstract

In this paper we present the results of a numerical study of convective heat transfer from a single cube, located on a plane surface perpendicular to the incoming flow. The Reynolds numbers, calculated from the height of the cube and the average velocity, are Re = 4200 and 46400. Numerical simulation is performed using the RANS and LES methods. The working fluid is air. Thermal condition on a flat surface and on the cube faces is a constant heat flux. A three-dimensional picture of the structure of the horseshoe-shaped vortex around the cube is clearly shown. Areas with maximum pressure loads on the surface of the cube are identified. The main attention is paid to the peculiarities of heat transfer in the flow around a cube with a turbulent flow. Areas on the cube surface where the most effective heat transfer occurs, as well as low-efficiency stagnant zones with low fluid velocity and high temperatures are shown. The obtained data on aerodynamics and heat transfer are compared with the experimental data of other authors.