NUMERICAL STUDY OF HEAT DISSIPATION FOR FLOW OVER PERFORATED HOT CYLINDER WITH DIFFERENT HOLES ANGLE AT DIFFERENT MATERIALS
The operation of many industrial devices can be improved by increasing the disposal of generated heat. The perforated cylinder can be used in many engineering application as heating pipe and perforated rib. For this reason, the heat dissipation from perforated hot tubes improving by presented a new shape. There are mutually effects between pressure fluctuations, temperature and fluid flow velocity vectors for choosing a suitable turbulent mode that presented the heat perforated tube. Moreover, the shape of hot tube and its holes plays a great rule for improving and increase the heat loss to fluid that flow through it. The turbulent model can be used to illustrate the effect of dimensions and angle of holes for perforated cylinder. The K- turbulent model at high Reynolds number with induced the wall function that presented the effect of holes shape on improving fluid flow behavior at entrance and exit holes regions. The numerical analysis is used to investigate the improvement in thermal translated with annuals space of hollow cylinder affected by changing the arcs and angles of the side holes of the heat pipe at different Reynolds number. The ANSYS 16.1 software used to simulate the 2D geometry of fluid flow over and through perforated heat tubes. Building a simulation turbulent model by (Ansys-Fluent 16.1) using the circular cross section with symmetrical holes at angles (20o, 30o and 40o) with high Reynolds number in real dimensions. The results show that the entrance arc helps flow to continue through the inside space of tubes taking high amount of Excess heat energy. Moreover, the type of materials has a good effect on improving Nusselt number that proportional to the material's conductivity.
Perforated Cylinder, Heat Dissipation, Control Boundary Layer, Stream Lines.