I REPORT experiments on drag reduction by saline solutions of a partially hydrolysed polyacrylamide (PAMH) showing the effect of macromolecule conformation. The extreme collapsed and extended PAMH conformations also simulate the deportment of linear random-coiling macromolecules in solution, and of high aspect ratio fibres in suspension; and they indicate a possible relationship between the mechanisms of drag reduction produced by these additives.
This is a preview of subscription content, access via your institution
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Rent or buy this article
Get just this article for as long as you need it
Prices may be subject to local taxes which are calculated during checkout
Virk, P. S., J. Fluid Mech., 45, 417, (1971).
Parker, C. A., Hedley, A. H., Nature phys. Sci., 236, 61, (1972).
Hand, J. H., Williams, M. C., CEP Symp. Ser. No. 111, 67, 6, (1971).
Bobkowicz, A. J., Gauvin, W. H., Can. J. chem. Engng, 43, 87, (1965).
Pirih, R. J., Swanson, W. M., Can. J. chem. Engng, 50, 221, (1972).
Veseleski, R. C., Metzner, A. B., A.I.Ch.E.Jl, 20, 301, (1974).
Rights and permissions
About this article
Cite this article
VIRK, P. Drag reduction by collapsed and extended polyelectrolytes. Nature 253, 109–110 (1975). https://doi.org/10.1038/253109a0
This article is cited by
Glimpses of Flow Development and Degradation During Type B Drag Reduction by Aqueous Solutions of Polyacrylamide B1120
Flow, Turbulence and Combustion (2018)
Invariant Type-B characteristics of drag-reducing microalgal biopolymer solutions
Experiments in Fluids (2017)
Effect of intermolecular cross links on drag reduction by polymer solutions
Polymer Bulletin (1996)
Rheological and drag reduction characteristics of xanthan gum solutions
Rheologica Acta (1988)
The effect of the conformation of macromolecules on the hydrodynamic effectiveness of polyacrylamide
Journal of Engineering Physics (1986)
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.