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???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 ?=0 deg and ?=25 deg
respectively.
A Comparative Study of Fluid Flow and Mass Transfer in a Trumpet-Shaped Ladle Shroud Using Large Eddy Simulation