TY - JOUR
TI - Convective heat transfer over a wall mounted cube at different angle of attack using large eddy simulation
AU - Heidarzadeh Habibollah
AU - Farhadi Mousa
AU - Sedighi Kurosh
JN - Thermal Science
PY - 2014
VL - 18
IS - 12
SP - 301
EP - 315
PT - Article
AB - Turbulent fluid flow and convective heat transfer over the wall mounted cube  in different flow angle of attack have been studied numerically using Large  Eddy Simulation. Cube faces and plate have a constant heat flux. Dynamic  Smagorinsky (DS) subgrid scale model were used in this study. Angles were in  the range 0≤θ≤45 and Reynolds number based on the cube height and free stream  velocity was 4200. The numerical simulation results were compared with the  experimental data of Nakamura et al [6, 7]. Characteristics of fluid flow  field and heat transfer compared for four angles of attack. Flow around the  cube was classified to four regimes. Results was represented in the form of  time averaged normalized streamwise velocity and Reynolds stress in different  positions, temperature contours, local and average Nusselt number over the  faces of cube. Local convective heat transfer on cube faces was affected by  flow pattern around the cube. The local convective heat transfer from the  faces of the cube and plate are directly related to the complex phenomena  such as horse shoe vortex, arch vortexes in behind the cube, separation and  reattachment. Results show that overall convective heat transfer of cube and  mean drag coefficient have maximum and minimum value at θ=0 deg and θ=25 deg  respectively.