Forced convective heat transfer in concentric annuli with turbulent flow

This Data Item is available as part of the ESDU Sub-series on Heat Transfer. From a wide range of data sources, a correlation giving the variation of Stanton number with Reynolds number and Prandtl number for a complete range of annulus diameter ratios from zero (plain circular tube) to unity (parallel plates) is derived. The basic calculation is derived for a uniform heat flux at one surface with the other surface insulated. Data and method for dealing with other situations are also provided. These include uniform heat flow, of equal or differing magnitudes, at both surfaces, varying heat flux at one or both surfaces, and constant surface temperature at one or both surfaces. In addition, some qualitative guidance is provided on the influence of effects such as free convections, eccentricity, and developing temperature profile.