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Proceedings Paper

Wavefront sensors for optical diagnostics in fluid mechanics: application to heated flow, turbulence, and droplet evaporation
Author(s): Daniel R. Neal; Timothy J. O'Hern; John R. Torczynski; Mial E. Warren; Randy J. Shul; T. Stewart McKechnie
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Paper Abstract

Optical measurement techniques are extremely useful in fluid mechanics because of their non- invasive nature. However, it is often difficult to separate measurement effects due to pressure, temperature and density in real flows. Using a variation of a Shack-Hartmann wavefront sensor, we have made wavefront measurements that have extremely large dynamic range coupled with excellent sensitivity at high temporal and spatial resolution. These wavefront variations can be directly related to density perturbations in the fluid. We have examined several classes of flow including volumetrically heated gas, grid turbulence and droplet evaporation.

Paper Details

Date Published: 2 December 1993
PDF: 10 pages
Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); doi: 10.1117/12.163703
Show Author Affiliations
Daniel R. Neal, Sandia National Labs. (United States)
Timothy J. O'Hern, Sandia National Labs. (United States)
John R. Torczynski, Sandia National Labs. (United States)
Mial E. Warren, Sandia National Labs. (United States)
Randy J. Shul, Sandia National Labs. (United States)
T. Stewart McKechnie, S-Systems Corp. (United States)

Published in SPIE Proceedings Vol. 2005:
Optical Diagnostics in Fluid and Thermal Flow
Soyoung Stephen Cha; James D. Trolinger, Editor(s)

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