Chinese Optics Letters, 2015, 13 (7): 072801, Published Online: Sep. 14, 2018
Simultaneous 3D temperature and velocity field measurements of micro-flow with laser-induced fluorescence and micro-digital holographic particle tracking velocimetry: Numerical study Download: 764次
Abstract
We propose a method for simultaneous 3D temperature and velocity measurement of a micro-flow field. The 3D temperature field is characterized with two-color laser-induced fluorescence particles which are tracked with micro-digital holographic particle tracking velocimetry. A diffraction-based model is applied to analyze defocused particles to determine the intensity ratio of two fluorescent dyes on the particle. The model is validated with experimental images. As the result shows that the intensity ratio nearly remains unchanged with respect to depth positions, defocused particles can be used as 3D temperature sensors. Numerical work is carried out to check the method, and 3D temperature and velocity field in a 120 μm × 120 μm × 80 μm test volume are retrieved.
Longchao Yao, Xuecheng Wu, Jing Yang, Yingchun Wu, Xiang Gao, Linghong Chen, Gérard Gréhan, Kefa Cen. Simultaneous 3D temperature and velocity field measurements of micro-flow with laser-induced fluorescence and micro-digital holographic particle tracking velocimetry: Numerical study[J]. Chinese Optics Letters, 2015, 13(7): 072801.