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Turbulent flow characteristics of viscoelastic fluids

Published online by Cambridge University Press:  28 March 2006

A. B. Metzner  and
M. Graham Park
A. B. Metzner
Affiliation:
University of Delaware, Newark, Delaware
M. Graham Park
Affiliation:
University of Delaware, Newark, Delaware Present address: E. I. du Pont de Nemours and Company, Wilmington, Delaware.
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Abstract

In this paper the turbulent flow characteristics of viscoelastic fluids are investigated quantitatively. The outstanding property of these flow fields is seen to be a very pronounced suppression of turbulence, accompanied by major reductions in the turbulent drag coefficients. Careful measurements of the rheological properties of the several fluids used suggest that the observed turbulence suppression is a function of the ratio of the elastic to the viscous forces developed in the fluid. An empirical correlation of the results, based upon this observation, is proposed; the present data, while indicative, are not sufficiently extensive to verify conclusively the existence of a quantitative correlation.

In a number of respects, the observed reduction in drag is similar to that which may be obtained through promotion of ‘slip’ at the tube wall or by addition of particulate matter. It is shown that slip phenomena are clearly distinct from those studied in the present work but that particulate effects (albeit of much greater magnitude than observed heretofore) cannot be ruled out as contributory mechanisms. Further studies are thus required to determine the relative importance of continuum (viscoelastic) and particulate effects.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 20 , Issue 2 , October 1964 , pp. 291 - 303
Copyright
© 1964 Cambridge University Press

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