title: Effect of polymer additives on heat transport in turbulent thermal convection.
abstract: In this Letter, we explore the possible effects of polymer additives on heat transport in turbulent thermal convective flows. Using both direct numerical simulations and shell-model calculations, we show that polymer additives can significantly enhance the heat transport in homogeneous turbulent thermal convection, which mimics the bulk of turbulent Rayleigh-Bénard convection. We also discuss the implication of our results for turbulent Rayleigh-Bénard convection, in which there are boundary layers in addition to the central bulk.
authors.affiliation: Dipartimento di Fisica and INFN, Università Tor Vergata, Via della Ricerca Scientifica 1, I-00133 Roma, Italy.
authors.forename: Roberto
authors.initials: R
authors.lastname: Benzi
authors.forename: Emily S C
authors.initials: ES
authors.lastname: Ching
authors.forename: Elisabetta
authors.initials: E
authors.lastname: De Angelis