72th Annual Meeting of the APS Division of Fluid Dynamics (November 23, 2019 — November 26, 2019)

V0073: Talbot-Effect Structured Illumination - TESI: Application to 3D profilometry and micro-MTV

  • Charles Fort, The George Washington University
  • Matthieu André, The George Washington University
  • Philippe Bardet, The George Washington University
DOI: https://doi.org/10.1103/APS.DFD.2019.GFM.V0073

Based on a fascinating fractal optical interference feature, Talbot-Effect Structured Illumination (TESI) is implemented into two laser-based diagnostics used in experimental fluid dynamics: laser-induced fluorescence (LIF) and molecular tagging velocimetry (MTV). The developed technique offers a broad range of resolution, down to 10 µm, and is demonstrated with 3D surface reconstruction of a free surface (TESI-LIF) and with velocity measurements in water (TESI-MTV), opening new possibilities for small scale measurements of wall turbulence and interfacial transfers.

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