Session Cj - Experimental Techniques.
ORAL session, Sunday, November 23
310, Moscone Center
Particle Image Velocimetry (PIV) is becoming a well established experimental technique to measure two components of the velocity in a planar region of a flow field. An experimental method will be described which shows how its proven capabilities can be further extended by using holographic recording to register the particle displacements. Among other unique characteristics, holography enables the acquisition of multiple images on a single plate, and the recording of three dimensional images. These features coupled with cross-correlation digital PIV (CCDPIV) analysis of the digitised reconstructed hologram are used to circumvent some of the limitations of conventional PIV. Some of these possibilities are demonstrated in this study by applying the technique to a high Reynolds number swirling flow using a lens-less off-axis orthogonal recording geometry.