Measurement of 3-D Flow inside a Micro Curved-tube using Digital Micro Holographic Particle Tracking Velocimetry

A digital micro Holographic Particle Tracking Velocimetry (HPTV) system consisting of a high-speed camera and a single laser with Acoustic Optical Modulator (AOM) chopper was established. The digital micro HPTV system was applied to water flow in a micro curved-tube for measuring instantaneous 3-D velocity field data consecutively. The micro curved-tube is using to reproduce the dorsal aorta or utilize in various lap-on-a-chip. The temporal evolution of a three-dimensional water flow in the micro curved-tube (the curvature, κ=1/φ, 2/φ, 4/φ, 8/φ) of 100 υ μm and 300 μm inner diameters was obtained and mean velocity field distribution was obtained by statistical-averaging the instantaneous velocity fields