Abstract:
Convective heat transfer in a homogeneous fluid flow Reynolds number of order
less than 2000 over an immersed axi-symmetrical body with curved surfaces has
been investigated. The fluid flow in consideration was unsteady and of constant
density .This study analysed the extent to which convective heat transfer has on
drag and lift on bodies submerged in fluid. The different temperature profiles
which were as a result of temperature gradients, caused the convective heat
transfer. These different temperature profiles were brought about by frictional
forces on and within the surface of the body when fluid flowed over it. Velocity
variations were also determined and were used to evaluate these temperature
profiles. To obtain these profiles, various flow parameters were varied in the
equations governing the fluid flow. These equations were non-linear and there
exists no analytical method of solving them, hence a suitable numerical method in
this case finite difference method was used. Results of the velocity variations and
temperature variations were obtained followed by graphical representation of the
results. It was however noted that when the Reynolds number was increased, the
heat dissipation also increased, when the curvature of the surface was increased,
the dissipation also increased. These results have major application in designing
devices requiring high manoeuvrability and less resistance to the motion e.g.
aerofoil, spray atomizers and cooling fans.
