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Fluid-property effects on flow-generated waves on a compliant surface

Published online by Cambridge University Press:  20 April 2006

R. J. Hansen  and
D. L. Hunston
R. J. Hansen
Affiliation:
Fluid Dynamics Branch, Naval Research Laboratory, Washington, D.C., 20375
D. L. Hunston
Affiliation:
Polymer Science and Standards Division, National Bureau of Standards, Washington, D.C., 20234
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Abstract

An experimental study of the influence of liquid viscosity and viscoelasticity on flow-generated waves on a compliant surface has been conducted in a rotating-disk geometry. Over the entire range of liquid properties studied, each test gave a well-defined critical onset flow velocity above which waves were present and below which no waves were observed. This onset velocity increased with increasing fluid viscosity, and for sufficiently high viscosities the onset occurred when the flow on the disk was laminar rather than turbulent. The effects of liquid viscoelasticity were examined in the turbulent flow using dilute solutions of high-molecular-weight polymers. This type of viscoelasticity had little influence on the onset flow velocity in these circumstances, but did make the wave structure on the surface more regular in appearance than when the liquid was Newtonian. In all cases the wave structure produced a dramatic increase in drag similar to that expected for a rough surface. For the viscoelastic fluid, however, the increase in drag was much less than for a viscous fluid of the same viscosity.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 133 , August 1983 , pp. 161 - 177
Copyright
© 1983 Cambridge University Press

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References

Bordner, G. L. 1978 Nonlinear analysis of laminar boundary layer flow over a periodic wavy surface Phys. Fluids 21, 1471.Google Scholar
Brown, R. N. 1977 Turbulent pressure spectrum measurements of a compliant surface. In Turbulence in Liquids: Proc. 4th Biennial Symp. on Turbulence in Liquids, p. 210.
Dorfman, L. A. 1963 Hydrodynamic Resistance and the Heat Loss of Rotating Solids. Oliver and Boyd.
Gregory, N., Stuart, J. T. & Walker, W. S. 1955 On the stability of three-dimensional boundary layers with application to the flow due to a rotating disk Phil. Trans. R. Soc. Lond. A248, 155.Google Scholar
Hansen, R. J. & Hunston, D. L. 1974 An experimental study of turbulent flows over a compliant surface J. Sound Vib. 34, 297.Google Scholar
Hansen, R. J. & Hunston, D. L. 1976 Further observations on flow-generated surface waves in compliant surfaces J. Sound Vib. 46, 593.Google Scholar
Hansen, R. J., Hunston, D. L., Ni, C. C. & Reischman, M. M. 1980 An experimental study of flow-generated waves on a flexible surface J. Sound Vib. 68, 317.Google Scholar
Hansen, R. J., Hunston, D. L., Ni, C. C., Reischman, M. M. & Hoyt, J. W. 1979 Hydrodynamic drag and surface deformations generated by liquid flows over flexible surfaces. In Progress in Aeronautics and Astronautics: Viscous Flow Drag Reduction 72, 439.Google Scholar
Little, R. C., Hansen, R. J., Hunston, D. L., Kim, O. K., Patterson, R. L. & Ting, R. Y. 1975 The drag reduction phenomenon: observed characteristics, improved agents, and proposed mechanisms. Ind. Engng Chem. Fund. 14, 283.Google Scholar
Metzner, A. B. & Metzner, A. P. 1970 Stress levels in rapid extensional flows of polymeric fluids Rheol. Acta 9, 174.Google Scholar
Ting, R. Y. & Hunston, D. L. 1977 Polymeric additives as flow regulators. Ind. Engng Chem.: Prod. R. & D. 16, 129.Google Scholar