Abstract:
Convective heat transfer about an isothermal, cylindrical
extrudate of constant diameter, issuing continuously from an
extrusion die, is investigated numerically, using a commercial
CFD software package. The hot extrudate is assumed to move
vertically downward, thus giving rise to a combined regime of
forced and free convection in the surrounding fluid. Prandtl
number of 0.707, corresponding to air near standard conditions,
is used. It is seen that when extrudate speed is very low, heat
transfer decreases as speed is increased. However this trend is
reversed at higher extrudate speed. Flow pattern in the ambient
fluid, and effects of Rayleigh number on the extrudate's heat
transfer, will also be presented.
