CONVECTIVE HEAT-TRANSFER IN ROTATING ISOTHERMAL DUCTS

Convective heat transfer in the hydrodynamically and thermally fully developed region of rotating radial rectangular ducts is studied theoretically. A pair or pairs of vortices superimposed on the main flow are introduced in the duct by the coriolis force. The fluid with a temperature T0 is heated by the duct wall with an isothermal temperature Tw and the fluid bulk temperature may increase exponentially after a sufficiently long heating length. Consequently, the three-dimensional energy equation can be reduced to a two-dimensional eigenvalue problem and the axial conduction is also considered for a small Peclet number. The present study covers parameters Pr = 0.7 and 7.0, Pe = ∞, 5 and 1 and Re Reω = 0-2×105 for rectangular channels with aspect ratios γ = 0.2, 0.5, 1, 2 and 5. f{hook} Re/(f{hook} Re)0 and Nu/Nu0, indicating the flow and heat transfer characteristics of the problem, are shown. The results are compared with the existing data in the literature. © 1990.