Numerical analysis has been made for turbulence promoter which has a pair of circumferential fin and circular disk plate in series within a pipe. As a closure model for the turbulent equations, the curvature dependent 2-equation model was used since all the flow field is occupied by separated flows with intensive streamline curvature.
The periodic nature of flow and temperature field enables numerical analysis to be confined in a single isolated module without involvement of the entrance region problem. For the Numerical work, a general 2-D elliptic code(CHAMPION) was modified with the skew-upwind scheme to reduce numerical diffusion problem. The boundary condition was specified a constant wall heat flux and the diameter of the fin and disk and pitch of the fins were varied to investigate their effect on the overall heat transfer rate.
Although since experimental data are not available for direct comparison, predicted profiles of various turbulence quantities and the overall Nusselt number variation depending on the geometric configuration seem to be physically realistic. Further experimental study is required to verify the observed heat transfer augmentation by the proposed geometry of the pair of fin and circular disk.
