Polymer heat transport enhancement in thermal convection: the case of Rayleigh-Taylor turbulence

Details Polymer heat transport enhancement in thermal convection: the case of Rayleigh-Taylor turbulence Polymer heat transport enhancement in thermal convection: the case of Rayleigh-Taylor turbulence

2010-01-19

arxiv.org/abs/1001.3314v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 5 figures

Scientific paper

We study the effects of polymer additives on turbulence generated by the ubiquitous Rayleigh-Taylor instability. Numerical simulations of complete viscoelastic models provide clear evidence that the heat transport is enhanced up to 50% with respect to the Newtonian case. This phenomenon is accompanied by a speed up of the mixing layer growth. We give a phenomenological interpretation of these results based on small-scale turbulent reduction induced by polymers.

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