This paper demonstrates experimentally that imposed periodic forcing can significantly alter the global flow characteristics of over a double backward-facing step. The geometry consists two equal height steps spaced up to eight step heights apart. A zero-mass flux jet located at first step's top corner was issued frequencies ranging from below step-mode instability frequency approximately five ...

Simulations of turbulent convection flow adjacent to a two-dimensional backward-facing step are presented to explore the effects of step height on turbulent separated flow and heat transfer. Reynolds number and duct’s height downstream from the step are kept constant at Re0 = 28,000 and H = 0.19 m, respectively. Uniform and constant heat flux of qw = 270 W/m 2 is specified at the stepped wall d...