Europhys. Lett.
Volume 75, Number 3, August 2006
Page(s) 441 - 447
Section Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics
Published online 28 June 2006
Europhys. Lett., 75 (3), pp. 441-447 (2006)
DOI: 10.1209/epl/i2006-10124-7

Delay of disorder by diluted polymers

A. V. Kityk1, 2 and C. Wagner1

1  Experimentalphysik, Universität des Saarlandes - 66041 Saarbrücken, Germany
2  Institute for Computer Science, Technical University of Czestochowa Armii Krajowej 17, PL 42-200 Czestochowa, Poland

received 25 January 2006; accepted in final form 9 June 2006
published online 28 June 2006

We study the effect of diluted flexible polymers on a parametrically driven, disordered capillary wave state. The primary pattern after the first bifurcation from the flat interface is given by squares. With increasing driving strength we observe a melting of the square pattern. Angular and radial correlations are lost and the wave spectrum beyond the basic wave number consists of a continuum only. The addition of a small amount of polymers shifts the disorder transition to higher driving strengths, without affecting the critical acceleration of the first bifurcation. Simultaneously the short wave length -high frequency- fluctuations are suppressed. The effect can be explained only by taking the high elongational viscosity of the polymer solution into account.

47.27.Cn - Transition to turbulence.
47.54.-r - Pattern selection; pattern formation.
47.35.Pq - Capillary waves.

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