Forced Convection Heat Transfer in an Annulus at Low Reynolds Numbers.

In this paper the results are presented of an experimental investigation on heat transfer with air in forced convection flow in an annulus with a heated core at uniform temperature and an insulated outer wall, at low Reynolds numbers (Re equals 700 divided by 2200). Referring to analytical investigations on the subject, developed on the basis of constant fluid properties, a comparative analysis is carried out between the experimental and theoretical data on temperature distributions and heat fluxes, at the aim of evaluating the effect of fluid properties variation on heat transfer problems. 12 Refs.