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Direct Numerical Simulation of turbulent heat transfer behind a backward‐facing step at low Prandtl number
Author(s) -
Niemann Martin,
Fröhlich Jochen
Publication year - 2014
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201410313
Subject(s) - turbulent prandtl number , prandtl number , mechanics , magnetic prandtl number , turbulence , heat transfer , thermodynamics , flow (mathematics) , physics , materials science , nusselt number , reynolds number
Abstract The paper presents Direct Numerical Simulations of the turbulent flow of a low Prandtl number fluid over a backward‐facing step with heat transfer. The backward‐facing step flow is investigated as a generic configuration for sudden changes in cross section. Several simulations are reported: for isothermal conditions, for heat transfer with the Prandtl number of air, and for heat transfer with the Prandtl number of liquid sodium. The simulation for air is compared to results from literature. The differences induced by reduction of the Prandtl number are then assessed by comparison of the two cases. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)