Profilometry using structured illumination - presented by Philippe Bardet | Practical aspects of designing background-oriented schlieren (BOS) experiments for vortex measurements - presented by Dr. Clemens Schwarz

Profilometry using structured illumination

Philippe Bardet

Practical aspects of designing background-oriented schlieren (BOS) experiments for vortex measurements

Dr. Clemens Schwarz

Dr. Clemens SchwarzPB
Slide at 04:52
Most common optical techniques for surface reconstruc Philippe Bardet Stereo-correlation/ Projection based PLIF/S-PLIF Surface tracers tracking Refraction based 0.5 mm 10221) 2019) 10013) Roct Trume Andre Gon't Duncan et al. (1999) 2 cm André & Bardet (2014) Murase (1992) Tsubaki & Fujita (2005) Eaket et al. (2005) Charogiannis et al. (2019) Moisy et al. (2009) Oya et al. (2008) Turney et al. (2009) van Meerkerk et al. (2020) Gomit et al. (2013) Hu et al. (2015) Fleming et al. (2018) Damiano et al. (2016) Roth et al. (2020) Steinmann et al. (2021) THE GEORGE WASHINGTON UNIVERSITY WASHINGTON DO
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References
  • 1.
    A. Roth et al. (2020) Snapshot 3D reconstruction of liquid surfaces. Optics Express
  • 2.
    R. Tsubaki and I. Fujita (2005) Stereoscopic measurement of a fluctuating free surface with discontinuities. Measurement Science and Technology
  • 3.
    10.1109/ICSENST.2008.4757091
  • 4.
    H. Kim et al. (2015) Nodal to Nodeless Superconducting Energy-Gap Structure Change Concomitant with Fermi-Surface Reconstruction in the Heavy-Fermion CompoundCeCoIn5. Physical Review Letters
  • 5.
    J. Eaket et al. (2004) Use of Stereoscopy for Dam Break Flow Measurement. Journal of Hydraulic Engineering
  • 6.
    J. E. Turney et al. (2009) Predicting phonon properties and thermal conductivity from anharmonic lattice dynamics calculations and molecular dynamics simulations. Physical Review B
  • 7.
    10.1177/1475090218797785
  • 8.
    T. Steinmann et al. (2021) Volumetric Lagrangian Particle Tracking, Air water interface, insect locomotion, surface tension. 14th International Symposium on Particle Image Velocimetry
  • 9.
    C. S. M. Turney et al. (2020) A global mean sea surface temperature dataset for the Last Interglacial (129–116 ka) and contribution of thermal expansion to sea level change. Earth System Science Data
  • 10.
    B. D. Duncan and K. N. Ghia (1999) Direct Numerical Simulation of Transitions Toward Turbulence in Complex Channel Flows. Fluid Mechanics and Its Applications
  • 11.
    M. A. André and P. M. Bardet (2014) Velocity field, surface profile and curvature resolution of steep and short free-surface waves. Experiments in Fluids
  • 12.
    A. Charogiannis et al. (2019) Structured planar laser-induced fluorescence (S-PLIF) for the accurate identification of interfaces in multiphase flows. International Journal of Multiphase Flow
  • 13.
    M. v. Meerkerk et al. (2020) Scanning stereo-PLIF method for free surface measurements in large 3D domains. Experiments in Fluids
  • 14.
    H. Murase (1992) Surface shape reconstruction of a nonrigid transport object using refraction and motion. IEEE Transactions on Pattern Analysis and Machine Intelligence
  • 15.
    F. Moisy et al. (2009) A synthetic Schlieren method for the measurement of the topography of a liquid interface. Experiments in Fluids
  • 16.
    G. Gomit et al. (2013) Free surface measurement by stereo-refraction. Experiments in Fluids
  • 17.
    A. P. Damiano et al. (2016) Surface topography measurements of the bouncing droplet experiment. Experiments in Fluids
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Summary (AI generated)

Projection-based techniques typically require an opaque flow and projection of a pattern on the surface. However, this method cannot be used to measure the velocity below the surface using surface th three cells. Luckily, there has been fantastic development lately, with Steinman 2021 being the latest development. Although they have a similar resolution to what we have, we use a different approach, traditional laser and fluorescent planar techniques, in my group.

This approach is what inspired us to move to the next phase of structural deli investigations. We realized that some of our data had dots on the windows, which created structural issues. We thought we could reconstruct this using a refraction-based approach. There are four options for methods here, and we could reconstruct the velocity interface profile in front of the laser plane.

In typical refraction-based techniques, there are two ways to approach it. One way is to put a pattern on the bottom wall of the experiment, take an image from the gas side, and observe the deformations of this pattern due to the snapshot of light. This method allows you to put an interface. Another option is to plow the surface and correlate images to get the deformation from that random pattern of PAB dot.

However, working with a parallel plane can lead to red crossing, which may lead to ambiguity in the reconstruction.