简介:Along with the rapid growth of research of microfluidics, monitoring and understanding micro flow
behavior is a challenge for researchers. Particle Image Velocimetry (PIV), a powerful tool that
makes flow visible, was 简介:Along with the rapid growth of research of microfluidics, monitoring and understanding micro flow
behavior is a challenge for researchers. Particle Image Velocimetry (PIV), a powerful tool that
makes flow visible, was extended to microscale by Santiago et al. 1998. In this paper, we presented
the micro Particle Image Velocimetry (μPIV) system at Nanyang Technological University (NTU),
its calibration and characterizations of microfluidic devices using μPIV. Since the fully developed
microchannel flow has been well investigated, it is suitable to calibrate the measurements of μPIV.
In our experiment, an in-channel microdispenser fabricated on printed circuit board is used to form a
microchannel. A syringe pump forces water that contains fluorescent particles. The flow field is obtained
by μPIV. At the same time, a three-dimensional model with ANSYS/FLOTRAN was used.
The comparison between the two results demonstrates that our μPIV system works well. Furthermore
we use this system to characterize a Tesla valve - a non-moving part valve. The valve consists
of a fluid channel structure that has rectification property, which favors forward flow while hampers
reverse flow. The velocity fields are also validated by ANSYS/FLOTRAN.详细>