简介:A stereo-μ-PIV system for the measurement of all three components of the velocity vector in a
measurement plane (2D-3C) in a closed microchannel has been developed and first test measurements have been
performed o简介:A stereo-μ-PIV system for the measurement of all three components of the velocity vector in a
measurement plane (2D-3C) in a closed microchannel has been developed and first test measurements have been
performed on the three-dimensional laminar flow in a T-shaped micromixer. Stereo-μ-PIV measurements in closed
microchannels require a calibration based on the self-calibration of the tracer particle images. In order to include the
effects of different refractive indices of the water in the microchannel, the glass of the entrance window, and the
surrounding air a three-media-model is included in the triangulation procedure of the self calibration. A preliminary
test case shows that the stereo-μ-PIV results deviate less than 5% from theoretical values. First measurements in the
mixing zone of a T-shaped micromixer show that three-dimensional flow in a microchannel can be resolved,
however, the accuracy of the measurements needs to be improved.详细>