Digital holographic PTV for complicated flow in a water by two cameras and refractive index-matching method

摘要

A basic heat transfer promoter such as packed beds of spheres is one of the technologies of the promotion of heat transfer using the turbulent mixture. We carried out 3-D visualization of digital holographic PTV to understand the complicated flow in a sphere-packed pipe (SPP) using a refractive index-matching method with a water used as a working fluid, the spheres was made of MEXFLON, whose refractive index is the same as that of a water. To visualize the detail flow structure around the spheres in water, we performed three-dimensional simultaneous measurements of velocity field in a water flow in the SPP are performed by our proposed holography technique with two cameras. The velocity field by two cameras could obtain finer flow structures than that by one camera.