Abstract
In the present study, the flow over a backward-facing step has been investigated experimentally. The relative step height to boundary layer thickness of an incoming flow are H/δ_0 = 0.5, 1.0 and 1.5. Mean and fluctuating velocity distributions for H/δ_0 = 0.5 and 1.0 were examined by a stationary hot-wire and flying hot-wire anemometer with I-type probe. Streamwise distributions of the forward-flow fraction, γ near the wall were calculated, and then reattachment points of the separating flow were evaluated as a location of γ= 50%. In the range of H/δ_0 = 0.5 to 1.5 in the present study, the reattachment length is almost constant.
