Smoothed Particle Hydrodynamics Simulations of Turbulent Flow in Curved Pipes With Different Geometries: A Comparison With Experiments

The swirling secondary flow in curved pipes is studied three-space dimensions using a weakly compressible Smoothed Particle Hydrodynamics (WCSPH) formulation coupled to new non-reflecting outflow boundary conditions. A large-eddy simulation (LES) model for turbulence benchmarked with existing experimental data. After validation of the present against results 90 grades pipe bend, detailed numerical study aimed at reproducing measurements wide range Reynolds numbers has been performed different geometries, including U bends, S-shaped and helically coiled pipes. In all cases, SPH calculated behavior shows reasonably good agreement across downstream bend terms streamwise velocity profiles cross-sectional contours. Maximum mean-root-square deviations from experimentally obtained are always less than 1.8%. This combined very matching between contours uprising capabilities scheme handling engineering applications streamline curvature, such as flows bends manifolds.