Abstract
A sphere-packed pipe (SPP) was scrutinized to clarify the complicated turbulent flow field by means of PIV measurement. The geometrically complicated system was visualized by matching refractive index of acrylic resin as the channel material and Sodium Iodide solution as the working fluid. The visualization experiment was conducted with Reynolds number based on the sphere diameter and Darcy velocity of 5,000. As a result, it was found that high velocity regions appeared in the vicinity of packed sphere near penetrating paths formed in the SPP. In addition, it was clarified that turbulence energy was mainly generated in the large velocity shear regions formed near the pipe wall behind the packed spheres.
