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(Color online) (a) Schematic of the custom-configured echo PIV system. (b) Transducer control interfaces, controllable parameters, and range of control values for each parameters.
Rotating flow measurement: (a) -mode particle image of the flow; (b) velocity field measured by echo PIV; and (c) echo PIV and optical PIV velocities along one radial line within the flow field.
(Color online) Jet flow measurement using echo PIV: (a) -mode particle imaging of the whole flow field; (b) velocity field of the vortex ring at the head of the jet.
Pipe flow measurement using echo PIV: (a) a comparison between echo PIV measured velocities of one laminar flow condition and the corresponding analytically derived velocity profile; (b) comparison of peak velocities obtained from echo PIV and ultrasound Doppler for the high-velocity pipe flow conditions.
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