Pipe flow turbulence at extreme reynolds numbers

Alexander J. Smits, Marcus Hultmark, Margit Vallikivi, Brian J. Rosenberg, Sean C.C. Bailey

Research output: Contribution to conferencePaper

5 Scopus citations

Abstract

Turbulent fluid motion is characterized by a large range of physical and temporal scales, so that the smallest eddies are typically many orders of magnitude smaller than the largest eddies, and the time scales also encompass many orders of magnitude. This complexity makes turbulent flows extremely difficult to predict and so experiments become crucial in any effort to model the flow behavior. It is the same complexity, however, that makes turbulence measurements very difficult, and current methods often suffer from inadequate spatial and temporal resolution to capture the full range of scales present in the flow. We describe a new nano-scale anemometry probe that dramatically extends the range of possible turbulence measurements, and we demonstrate its impact by presenting turbulence measurements in a pipe flow over an unprecedented range of conditions. The results reveal a remarkable similarity in the scaling for the mean flow and for the streamwise turbulence intensity, which marks the onset of what we call the extreme Reynolds number regime.

Original languageEnglish (US)
StatePublished - Jan 1 2011
Event7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 - Ottawa, Canada
Duration: Jul 28 2011Jul 31 2011

Other

Other7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011
CountryCanada
CityOttawa
Period7/28/117/31/11

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

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    Smits, A. J., Hultmark, M., Vallikivi, M., Rosenberg, B. J., & Bailey, S. C. C. (2011). Pipe flow turbulence at extreme reynolds numbers. Paper presented at 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011, Ottawa, Canada.