Axial Development of Unusual Velocity Profiles due to Heat Transfer in Variable Density Fluids

Abstract

Velocity profiles exhibiting maxima away from the axis of symmetry have been calculated for supercritical carbon dioxide flowing vertically in a heated circular duct. The analysis was carried out at the two-dimensional level and the turbulent fluxes are represented by a two equation model of turbulence. The existence of such velocity profiles has been accepted previously but the nature of their growth along a pipe was not known previous to this work.