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TECHNICAL PAPERS

LDA-Measurements of Transitional Flows Induced by a Square Rib

[+] Author and Article Information
S. Becker, F. Durst

Lehrstuhl für Strömungsmechanik (LSTM), Friedrich-Alexander Universität, Cauerstr. 4, D-95058 Erlangen-Nuremberg, Germany

C. M. Stoots

Idaho National Engineering and Environmental Laboratory (INEEL), Idaho Falls, ID 83415-3890Lehrstuhl für Strömungsmechanik (LSTM), Friedrich-Alexander Universität, Cauerstr. 4, D-95058 Erlangen-Nuremberg, Germany

K. G. Condie

Idaho National Engineering and Environmental Laboratory (INEEL), Idaho Falls, ID 83415-3890

D. M. McEligot

, Idaho National Engineering and Environmental Laboratory (INEEL), Idaho Falls, ID 83415-3885University of Arizona, Tucson, AZ 85721

J. Fluids Eng 124(1), 108-117 (Aug 08, 2001) (10 pages) doi:10.1115/1.1446067 History: Received October 04, 2000; Revised August 08, 2001
Copyright © 2002 by ASME
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References

Figures

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Comparison of transition induced by a square rib (Durst et al. 10) to that by a circular wire (Schlichting 8)
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Experimental apparatus, model configuration and nomenclature
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Velocity distribution in the flat plate boundary layer without a roughness element
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Evolution of flow over a two-dimensional square rib. (a) Rex,k≈6×104,k+≈11,k/δ1≈0.7,Rek≈318; (b) Rex,k≈1×105,k+≈16,k/δ1≈0.9,Rek≈529; (c) Rex,k≈1.4×105,k+≈21,k/δ1≈1,Rek≈741.
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(a) Development of boundary layer and turbulence statistics for flow with “laminar recovery.” Results normalized by freestream velocity and rib height. (b) Development of boundary layer and turbulence statistics for flow with “laminar recovery.” Wall coordinates.
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(a) Evolution of turbulent boundary layer. Results normalized by freestream velocity and rib height. (b) Evolution of turbulent boundary layer. Wall coordinates.

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