DNS of convective heat transfer in a rotating cylinder

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Abstract

The effects of rotation on the convective heat transfer and flow structuring in a cylindrical volume of fluid is investigated with direct numerical simulation (DNS). A formulation of the discrete equations of motion in cylindrical coordinates is solved with finite-difference approximations. At constant Rayleigh (Ra; dimensionless temperature gradient) and Prandtl (s; characterises diffusive properties of the fluid) numbers, the Rossby number Ro, the ratio of buoyancy and Coriolis forces, is varied between runs with 0. 045 = Ro = 8. For Ro ¿ 1. 2 we find the so-called large-scale circulation. At Ro ¿ 1. 2 slender columnar vortical plumes are found. In a range of Ro heat transfer is increased by Ekman pumping in the vortical plumes.
Original languageEnglish
Title of host publicationProceedings of the Seventh International ERCOFTAC Workshop on Direct and Large-Eddy Simulation, University of Trieste, Italy September 8-10, 2008
EditorsV. Armenio, J. Fröhlich, B.J. Geurts
Place of PublicationBerlin
PublisherSpringer
Pages393-398
ISBN (Print)978-90-481-3651-3
DOIs
Publication statusPublished - 2010
Event7th ERCOFTAC Workshop on Direct and Large-Eddy Simulations (DLES7), September 8-10, 2008, Trieste, Italy - Trieste, Italy
Duration: 8 Sep 200810 Sep 2008

Publication series

NameErcoftac Series
Volume13
ISSN (Print)1382-4309

Workshop

Workshop7th ERCOFTAC Workshop on Direct and Large-Eddy Simulations (DLES7), September 8-10, 2008, Trieste, Italy
Abbreviated titleDLES7
Country/TerritoryItaly
CityTrieste
Period8/09/0810/09/08
OtherERCOFTAC

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