ディジタルホログラフィを用いたマイクロ流れの高時間分解三次元計測に関する研究(流体工学,流体機械)

概要

論文の詳細を見る
High time-resolution flow field measurements in a micro-flow is performed by a micro digital-holographic particle-tracking velocimetry (micro-DHPTV) method. The system consists of an objective lens, a high-speed camera, and a single high-frequency double pulsed laser. Particle positions in a three-dimensional field can be reconstructed by a computer-generated hologram. The error of reconstruction in the z-directions is evaluated by traverse of particles on a glass plate. A velocity error in z-direction is obtained by uncertainty analysis. The time evolution of a three-dimensional water flow in a semicircular micro-channel of 101.9[μm] width and 32.5[μm] depth and in a circular micro-pipe of 92[μm] inner diameter are obtained successfully using this micro-DHPTV system. The volume of the system is defined by 409.6[μm]×92[μm]×92[μm], and is irradiated by a laser beam with a resolution time of 100[μs], and a repetition rate of 1[kHz]. Consequently, approximately 100 instantaneous velocity vectors on each 1000 frames for 1[s] in the micro-channel can be obtained.
2006-09-25