Separated Turbulent Flow Over a Wavy Wall
DNS by Maaß and Schumann
The impact of a wavy surface on turbulent flow is investigated by direct numerical simulations. By means of
finite differences in terrain following coordinates, the method treats the flow in a plane channel with wavy
lower and flat top surface. Both surfaces are smooth. The lower surface wave amplitude is 0.05 and the
wavelength is 1 in units of the mean channel height. The Reynolds number in terms of mean velocity and mean
channel height is 6760. At this Reynolds number an intermittend recirculation occurs. These parameters and
flow conditions are, apart from the exact surface shape, similar to those reported by Hudson et. al (1996).
Figure 1: Perspective view of the computational domain (from Maaß and Schumann, 1996).
Previous and Reference Numerical Solutions