Computation of Oscillating Turbulent Flows at Transitional Re-Numbers

The paper describes the application of a second moment closure to the computations of oscillating boundary layers, channel- and pipe flows at transitional and higher Reynolds numbers. The model reproduced well the ‘conditional turbulence’ with sudden turbulence bursts and subsequent relaminarization in the oscillating boundary layers in the whole range of transitional Reynolds numbers in accord with results of direct numerical simulation and experiments. Predictions of turbulence dynamics in the outer region of a channel or pipe show also a good qualitative agreement with experimental records.