Evaluation of Measurement Uncertainty of Temperature and Velocity by Stereoscopic PTIV Using Artificial Color Images for Liquid Crystals

Abstract

Measurement uncertainty of temperature and velocity by stereoscopic observation was evaluated using artificial color images. They were generated based on the numerical simulation data of thermal convection and with the experimental color- temperature relationship of the liquid crystals at various viewing angles of observation. The accuracy of temperature measurement was found to be improved at relatively small viewing angles between the light sheet and the camera, while that of the velocity measurement was optimized by selecting suitable combinations of PIV parameters, such as the interrogation window size, the search window size and the pixel.displacement of the images.