Abstract
Direct numerical simulation of a zero-pressure gradient drag-reducing turbulent boundary layer of viscoelastic solutions was performed using the constitutive equation models such as Oldroyd-B and Giesekus models. The distinct difference in turbulence statistics near the wall between Oldroyd-B model and Newtonian fluids is observed, as reported in the drag-reducing turbulent channel flow, while the difference between Giesekus model and Newtonian fluids is slight in this study. On the other hand, in the outer region, distributions of mean velocity and turbulence statistics for both Oldroyd-B and Giesekus models are similar to those for Newtonian fluids.
