Laminar and turbulent cavity wind flow: M. Immer
In the PhD of M. Immer the influence of turbulent inflow conditions on the cavity flow was measured using time-resolved PIV. The set-up consisted of a split-floor setup and turbulence generating spires and barriers. It was found that for low turbulent cases vortices are produced due to Kelvin-Helmholtz instabilities, while for high turbulent cases intermittent large sweep events penetrate into cavity
Measurement setup of cavity in a split-floor setup in the wind tunnel.
Snap shots of the instantaneous velocity field for the case of a laminar inflow (left), a moderate (middle) and high turbulent inflow (right).