Communications - Scientific Letters of the University of Zilina 2012, 14(11):47-52 | DOI: 10.26552/com.C.2012.4A.47-52

Complex Effects of Free Stream Turbulence and Surface Roughness on the Transitional Intermittency

Ondrej Hladik1, Pavel Jonas1, Oton Mazur1, Vaclav Uruba1
1 Institute of Thermomechanics AS CR, v.v.i., Praha, Czech Republic

The comparison of transitional intermittency distributions in boundary layers on smooth and rough surface is presented. The conditional analysis of the instantaneous wall friction is applied on time records made in transitional boundary layers originating on smooth surface or surface covered by sand paper. Special procedures of measurement and evaluation are applied that allowed evaluations of turbulent and nonturbulent zone averages.

Keywords: by-pass transition, rough wall boundary layer, CTA anemometry, instantaneous wall friction, intermittency analysis

Published: December 31, 2012  Show citation

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Hladik, O., Jonas, P., Mazur, O., & Uruba, V. (2012). Complex Effects of Free Stream Turbulence and Surface Roughness on the Transitional Intermittency. Communications - Scientific Letters of the University of Zilina, 14(4A), 47-52. doi: 10.26552/com.C.2012.4A.47-52
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