Abstract
To understand the flow physics in a serpentine passage over a porous wall, PIV measurements are carried out. Two kinds of porous media (#06, #20) which have the same porosity but different permeability are used. Flows at Re_b=600, 2700 are considered. It is found that the flow rates in the porous media and the flow motions going in and out of the porous media increase as the permeability increases. In the bend region, turbulence is enhanced by the bend structure, and in the flow after the bend region, it is also enhanced as the permeability increases. Also at Reb-600, longer turbulent flow regions are retained near the bend as the permeability increases because of the presence of the flow motions going in and out of the porous media.
