Numerical computations of steady and unsteady flow in bended pipes.

Authors: Hellström, F., Fuchs, L.F.
Document Type: Conference
Pubstate: Published
Journal: 37th AIAA Fluid Dynamics Conference and Exhibit, June 25-28, Miami, Florida
Volume: AIAA 2007-4350  
Year: 2007


The steady and pulsative turbulent flows in curved pipes have been computed with two different modeling approaches; the Reynolds Averaged Navier-Stokes (RANS) technique and Large Eddy Simulations (LES). The results from computations of the flow in a single bended pipe have been compared to experimental data. The comparisons show poor agreement for the RANS technique at the exit of the bend, while the LES computations show better agreement with the measured velocity profiles. The pulsatile flow in a double bended pipe has also been investigated and the vortex cores are visualized to enable a better insight into the unsteady flow field and the effects of the inflow pulsations.