000125613 001__ 125613
000125613 005__ 20190812205230.0
000125613 037__ $$aCONF
000125613 245__ $$aLarge Eddy Simulation of turbulent flow in curved and S-shape ducts
000125613 269__ $$a2003
000125613 260__ $$bKLUWER$$c2003$$aMunich
000125613 336__ $$aConference Papers
000125613 520__ $$aWe present Large-Eddy Simulations (LES) of the turbulent compressible flow in a curved and an S-shape duct of square cross section. The aim is to predict the three-dimensional structures which develop inside the cooling channels of heat exchangers and which dominate the heat transfer with the heated wall. We first consider a curved duct with one curvature only and then an S-shape duct with two opposite curvatures. We observe the formation of Görtler vortices which are moved close to the convex wall by the radial pressure gradient between the two curved faces. These are associated with a secondary flow of over 20% of the streamwise velocity. We determine the influence of wall heating and consecutively consider the case of concave wall heating and of convex wall heating. Due to the secondary flow associated with the Görtler vortices, we observe an enhancement of the heat flux in the first case and an inhibition in the second case.
000125613 6531_ $$aTurbulence
000125613 6531_ $$aheat transfer
000125613 6531_ $$alarge eddy simulation
000125613 700__ $$0243094$$g171834$$aMünch, Cecile
000125613 700__ $$aHebrard, Jerome
000125613 700__ $$aMétais, Olivier
000125613 7112_ $$d2003$$cMünich$$aDirect and large Eddy Simulation V
000125613 773__ $$tProceedings of the D-LES 5 Ercoftac Workshop$$q5217-537
000125613 8564_ $$zn/a$$uhttps://infoscience.epfl.ch/record/125613/files/dles5_munch.pdf$$s2543657
000125613 909C0 $$xU10309$$pLMH$$0252135
000125613 909CO $$ooai:infoscience.tind.io:125613$$qGLOBAL_SET$$pconf$$pSTI
000125613 937__ $$aLMH-CONF-2008-019
000125613 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000125613 980__ $$aCONF