A Study of a Low Reynolds Number Flow over a Backward Facing Step

A study on flow around the micro device is strongly required in MEMS development. The objective of this paper is to study dependence of Reynolds number on reattachment process over a backward-facing step in low Reynolds number flow. The Reynolds number based on step height H is 190930 and vortex structure was observed by Digital Video Camera (DV Camera) in a Micro Sensing Wind Tunnel which was constructed in the present research program. The transition vortex structure is observed depending on Reynolds number.