Author(s)

G.H. Klepp, G.H.D. Mtihlenbruch & J. Schmidt

Abstract

The heat transfer in stationary, fully developed annular flow with static or moving cores and asymmetric wall roughness is simulated. In order to describe the fully developed flow field a Reynolds stress model for high Reynolds num- bers is derived in the cylindrical coordinate system. The accurate description of the highly asymmetric annular flow is a prerequisite for the heat transfer computation, the turbulence transport properties being known, the heat transfer may be readily computed. The near wall region is described by an appropriate distribution law and using the Boussinesq approach. Temperature and flow fields are computed on two different grids, using a finite difference scheme on stretched grids. T

Keywords