Quantitative interpretation of complex, unsteady flows via high-image-density particle-image velocimetry

Donald Rockwell; Jung-Chang Lin

doi:10.1117/12.163733

2 December 1993 Quantitative interpretation of complex unsteady flows via high-image-density particle image velocimetry

Donald Rockwell, Jung-Chang Lin

Proceedings Volume 2005, Optical Diagnostics in Fluid and Thermal Flow; (1993) https://doi.org/10.1117/12.163733
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Representative classes of unsteady separated flows are interpreted using high-image-density particle image velocimetry,l which allows determination of the instantaneous, sectional streamline patterns and distributions of vorticity. Comparison of these instantaneous realizations in two orthogonal planes reveals fundamental mechanisms of distortion of the vorticity concentrations. Furthermore, by acquiring successive images closely spaced in time, it is possible to construct 3D volume representations of iso-vorticity. These quantitative approaches reveal limitations of interpreting patterns of instantaneous and ensemble-averaged flow structure.

Citation Download Citation

Donald Rockwell and Jung-Chang Lin "Quantitative interpretation of complex unsteady flows via high-image-density particle image velocimetry", Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); https://doi.org/10.1117/12.163733

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