Wavefront sensors for optical diagnostics in fluid mechanics: application to heated flow, turbulence, and droplet evaporation | Zendy

Daniel R. Neal | Zendy; Timothy J. O’Hern | Zendy; J. R. Torczynski | Zendy; Mial E. Warren | Zendy; R. J. Shul | Zendy; T. Stewart McKechnie | Zendy

Open Access

<title>Wavefront sensors for optical diagnostics in fluid mechanics: application to heated flow, turbulence, and droplet evaporation</title>

Author(s) -

Daniel R. Neal,

Timothy J. O’Hern,

J. R. Torczynski,

Mial E. Warren,

R. J. Shul,

T. Stewart McKechnie

Publication year - 1993

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.163703

Subject(s) - wavefront , turbulence , adaptive optics , optics , wavefront sensor , fluid dynamics , fluid mechanics , flow (mathematics) , physics , temporal resolution , evaporation , image resolution , flow measurement , mechanics , meteorology

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.

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