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Mixing by polymers: experimental test of decay regime of mixing,

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: T. Burghelea, E. Segre and Victor Steinberg

Editorial: American Physical Society, Physical Review Letters, 92, p.164501, 2004.


By using high molecular weight fluorescent passive tracers with different diffusion coefficients and
by changing the fluid velocity we study the dependence of a characteristic mixing length on the Peclet
number, Pe, which controls the mixing efficiency. The mixing length is found to be related to Pe by a
power law, Lmix / Pe0:260:01, and increases faster than expected for an unbounded chaotic flow. The role
of the boundaries in the mixing length abnormal growth is clarified. The experimental findings are in
good quantitative agreement with recent theoretical predictions.

Cuvinte cheie: batchelor regime of mixing, elastic turbulence, microfluidics