Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Comparison of length scale estimates for a sudden expansion flow estimated from spatial and auto correlation LDV measurements

  • 92 Accesses

Abstract

Two-point velocity correlation measurements were made in the anisotropic flow field of an axisymmetric sudden expansion using two single component LDV systems. The integral length scales and Taylor microscales were estimated and compared with those obtained from auto correlation measurements in conjunction with Taylor's hypothesis. The agreement of the integral scales was within 20% and the values scale well with the flow geometry, while the agreement of the microscales was within 43%.

This is a preview of subscription content, log in to check access.

References

  1. Gould RD; Benedict LH (1992) A comparison of spatial correlation and autocorrelation measurements in an axisymmetric sudden expansion flow using LDV, The 13th Symposium on Turbulence, Rolla, Missouri, Sept. 21–23

  2. Hinze JO (1975) Turbulence. McGraw-Hill

  3. Mayo WT; Shay MT; Ritter S (1974) The development of new digital data processing techniques for turbulence measurements with laser velocimetry. AEDC-TR-74-53

  4. Srikantaiah DV; Coleman HW (1985) Turbulence spectra from individual realization laser velocimetry data. Exp Fluids 3: 35–44

Download references

Author information

Correspondence to R. D. Gould.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Gould, R.D., Benedict, L.H. Comparison of length scale estimates for a sudden expansion flow estimated from spatial and auto correlation LDV measurements. Experiments in Fluids 17, 285–287 (1994). https://doi.org/10.1007/BF00203049

Download citation

Keywords

  • Auto Correlation
  • Correlation Measurement
  • Integral Scale
  • Sudden Expansion
  • Scale Estimate