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TECHNICAL PAPERS

Turbulent Boundary Layers on Surfaces Covered With Filamentous Algae

[+] Author and Article Information
Michael P. Schultz

Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402

J. Fluids Eng 122(2), 357-363 (Feb 08, 2000) (7 pages) doi:10.1115/1.483265 History: Received October 20, 1999; Revised February 08, 2000
Copyright © 2000 by ASME
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References

Figures

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Skin friction coefficient versus momentum thickness Reynolds number for the five test specimens (uncertainties in Cf: ±5 percent for the smooth specimen; ±10 percent for fouled profiles)
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Mean velocity profiles for algae #1 (uncertainty in U+ ±7 percent)
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Mean velocity profiles for algae #2 (uncertainty in U+ ±7 percent)
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Mean velocity profiles for the five test specimens @ x=1.75 m (uncertainty in U+: ±4 percent for the smooth surface; ±7 percent for the rough surfaces)
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Roughness functions for the test specimens (uncertainty in ΔU+ ±13 percent)
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Turbulent normal stress u′2/Uτ2 for algae #1 (uncertainty in u′2/Uτ2 ±10 percent)
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Turbulent normal stress v′2/Uτ2 for algae #1 (uncertainty in v′2/Uτ2 ±10 percent)
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Turbulent shear stress −uv/Uτ2 for algae #1 (uncertainty in −uv/Uτ2 ±11 percent)
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Turbulent normal stress u′2/Uτ2 for all the test surfaces @ x=1.75 m (uncertainty in u′2/Uτ2: ±6 percent for the smooth surface; ±10 percent for the rough surfaces)
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Turbulent normal stress v′2/Uτ2 for all the test surfaces @ x=1.75 m (uncertainty in v′2/Uτ2: ±6 percent for the smooth surface; ±10 percent for the rough surfaces)
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Turbulent shear stress −uv/Uτ2 for all the test surfaces @ x=1.75 m (uncertainty in −uv/Uτ2: ±7 percent for the smooth surface; ±11 percent for the rough surfaces)

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