STEADY AND UNSTEADY FORCED-CONVECTION PAST AN INCLINED ELLIPTIC CYLINDER

Discussed in this paper is the two dimensional problem of forced conve ction past an inclined elliptic cylinder. Both the steady state and un steady cases have been considered for moderate Reynolds numbers, R, in the range 40 less than or equal to R less than or equal to 70 with a Prandtl number Pr = 1. The numerical results show that there is good a greement between the steady and limiting unsteady heat transfer quanti ties <(Nu)over bar> and Nu which are the average and local Nusselt num bers respectively. The isotherm plots show marked differences as R is increased due to vortex shedding which is known to take place. Lastly, the early development for high Reynolds number flow past a harmonical ly oscillating and translating thin elliptic cylinder is addressed to illustrate the effect of rotation on the convective heat transfer proc ess. The main role of rotation is to cause fluctuations in the time va riation of <(Nu)over bar> and also to distort the thermal tail region emanating from the rear tip of the ellipse.