Effect of a polymer additive on heat transport in turbulent Rayleigh-Bénard convection. 2010

Guenter Ahlers, and Alexei Nikolaenko
Department of Physics, University of California, Santa Barbara, California 93106, USA.

Measurements of heat transport, as expressed by the Nusselt number Nu, are reported for turbulent Rayleigh-Bénard convection of water containing up to 120 ppm by weight of poly-[ethylene oxide] with a molecular weight of 4x10{6} g/mole. Over the Rayleigh number range 5x10{9} less than or approximately Ra less than or approximately 7x10{10} Nu is smaller than it is for pure water by up to 10%.

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