Turbulent boundary layer on a mildly curved convex surface
Abstract
Extensive single point turbulence measurements made in the boundary layer on a mildly curved heated convex wall show that the turbulence heat fluxes and Stanton number are more sensitive to a change in wall curvature than the Reynolds stresses and skinfriction coefficient, and that downstream, as the flow adjusts to new curved conditions, the St/c _{f} ratio of Reynolds analogy is appreciably lower than in plane wall flow for the same conditions. Details of the turbulence structure in unheated flow have been documented in an earlier paper; temperature field measurements now described comprise mean temperature distributions, the streamwise variation of wall heat flux, profiles of the temperature variance, transverse and streamwise heat fluxes, and triple correlations. Turbulent diffusion of heat flux is drastically reduced even by mild curvature; changes in the heat fluxes are of the same order as changes in the shear stress, that is, an order of magnitude greater than the ratio of boundary layer thickness to wall radius of curvature. The data include plane flow measurements taken in a developed boundary layer upstream of a change in wall curvature.
 Publication:

Experiments in Fluids
 Pub Date:
 June 1984
 DOI:
 10.1007/BF00261325
 Bibcode:
 1984ExFl....2...73G
 Keywords:

 Flow Geometry;
 Temperature Measurement;
 Turbulent Boundary Layer;
 Wall Flow;
 Cross Flow;
 Curvature;
 Heat Flux;
 Temperature Profiles;
 Turbulent Diffusion;
 Fluid Mechanics and Heat Transfer