Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published October 22, 2014 | Submitted
Report Open

Measurements of scalar power spectra in high Schmidt number turbulent jets

Abstract

Single-point, jet-fluid concentration measurements obtained from high Schmidt number (Sc ≃ 1.9 x 10^3) turbulent jets permit an investigation of temporal scalar power spectra, for jet Reynolds numbers in the range of 1.25 ≤ Re x 10^(-4)≤ 7.2. At intermediate scales, we find a spectrum with a logarithmic derivative (slope) that is increasing with Reynolds number, in absolute value, but less than 5/3 at the highest Reynolds number in our experiments. At the smallest scales, our spectra exhibit no k^(-1) power-law behavior, possessing a log-normal region over a range of scales exceeding a factor of 40, in some cases.

Additional Information

© 1992 California Institute of Technology GALCIT Report FM92-3. We would like to acknowledge contributions by Dan Lang and David Dowling to the experiments. This work was supported by AFOSR Grants No. 83-0213 and 88-0155. and GRI Contract No. 5087-260-1467.

Attached Files

Submitted - measurements_of_scalar.pdf

Files

measurements_of_scalar.pdf
Files (571.4 kB)
Name Size Download all
md5:a374e5a606d2b6588f732d84cfda2837
571.4 kB Preview Download

Additional details

Created:
August 20, 2023
Modified:
October 18, 2023