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Polymer Heat Transport Enhancement in Thermal Convection: The Case of Rayleigh-Taylor Turbulence

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PHYSICAL REVIEW LETTERS
卷 104, 期 18, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.184501

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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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