Investigation of small-scale flow structures by simultaneous flow -tagging and PIV experiments
Simultaneous observations of flow fields and species transport in a turbulent air flow with particle-imaging velocimetry (PIV) and NO-LIF flow tagging are reported. We discuss the advantages and disadvantages of both techniques in respect of the visualization of species transport processes. Whereas the characterization of the turbulence field is done with PIV, flow tagging shows clear advantages when measuring and predicting the transport of volume elements over extended (several 100 µs) periods.
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