Доступ предоставлен для: Guest
TSFP DL Home Архив Исполнительный Комитет

MODELLING TURBULENT HEAT FLUXES USING THE ELLIPTIC BLENDING APPROACH FOR NATURAL CONVECTION

Frederic Dehoux
EDF R&D, Fluid Mechanics, Energy and Environment Dept., 78401 Chatou, France; Institute Pprime, Dept. Fluid flow, heat transfer and combustion, CNRS−Univ. of Poitiers−ENSMA - SP2MI, teleport 2, 11 bd Marie et Pierre Curie, BP 30179, 86962 Futuroscope Chasseneuil Cedex, France

Sofiane Benhamadouche
Fluids Mechanics Energy and Environment Dept., EDF R&D, France

Remi Manceau
Institute Pprime, Dept. Fluid flow, heat transfer and combustion, CNRS-Univ. of Poitiers-ENSMA, France; Lab. de mathematiques et de leurs applications (LMA) CNRS-Universite de Pau et des pays de I'Adour IPRA, avenue de I'universite 64013 Pau, France; Inria Bordeaux-Sud-Ouest, project-team CAGIRE

Аннотация

The present contribution focuses on the modelling of the buoyancy production term in the transport equation for the dissipation of turbulent kinetic energy. The natural convection test case of Versteegh & Nieuwstadt (1999) is considered, which consists in a DNS of a differentially-heated, vertical-channel flow. Consistently with the underlying physics, it is found beneficial, contrary to the usual practise, to separately model the buoyancy and dynamic parts of the production of dissipation, in order to account for the increase of dynamic production and the variations of the thermal-to-mechanical time-scale ratio in the near-wall region.