PIV measurements of interface turbulence over hetero-porous media

In order to understand turbulent flow physics in the interface region over porous media, PIV measurements are carried out by the refractive index matching method. Two kinds of heterogeneous model porous media, whose porosities are the same but mean pore diameters are different, are applied to the measurements. The turbulent flow fields are discussed using the statistical measurement data. It is found that the fluctuation velocities increase as the mean pore diameter increases inside porous media. Also, it is confirmed that the fluctuation velocity normal to the interface increases as the interface-normal permeability increases.