[home] [Personal Program] [Help]

---

Session: Wall-bounded flows 6
Session starts: Friday 28 August, 10:30
Presentation starts: 11:30
Room: Room B

---

Marco Mazzuoli (Institute for Hydromechanics (IfH), Karlstuhe Institute of Technology (KIT), Karlsruhe, Germany)
Markus Uhlmann (Institute for Hydromechanics (IfH), Karlstuhe Institute of Technology (KIT), Karlsruhe, Germany)

Abstract:
The Direct Numerical Simulation (DNS) of an incompressible open channel flow over a layer of rigid spherical roughness elements fixed on the wall in well-packed square arrangement has been performed which shows values of the Reynolds number Rb ~ 6900 (ks+ ~ 100) and produces a mean velocity defect ∆U+ ~ 7 in the range of the fully-rough regime. First and second moment statistics of the velocity field have been analyzed. The stress distribution as well as the hydrodynamic force and torque acting on the surface of individual roughness elements have been computed. Results are presently shown and compared with those obtained in the context of a previous DNS performed in the transitionally rough regime.