1 November 1990 Quantitative fluid flow analysis by laser speckle velocimetry
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Abstract
Synergizing laser speckle velocimetry (LSV) or particle image velocimetry (PIV) with finite-element smoothing is shown to be a highly effective means of determining the derivatives, divergences, and vorticities of a flow field. A ''pseudo'' finite-element technique is used to smooth and differentiate discrete 2D velocity field data generated by the pointwise analysis of an LSV or a PIV specklegram. This technique is shown to be significantly more effective than either a 1D cubic spline technique or a straight finite-difference technique.
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Robert E. Rowlands, Robert E. Rowlands, Z. Feng, Z. Feng, T. Dixon Dudderar, T. Dixon Dudderar, } "Quantitative fluid flow analysis by laser speckle velocimetry", Proc. SPIE 1404, ICALEO '89: Optical Methods in Flow and Particle Diagnostics, (1 November 1990); doi: 10.1117/12.34954; https://doi.org/10.1117/12.34954
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