000125616 001__ 125616
000125616 005__ 20190316234312.0
000125616 037__ $$aCONF
000125616 245__ $$aLarge Eddy Simulation of turbulent flow in curved ducts: influence of the curvature radius
000125616 260__ $$bKluwer$$c2005
000125616 269__ $$a2005
000125616 336__ $$aConference Papers
000125616 520__ $$aWe present Large-Eddy Simulations (LES) of the turbulent compressible flow in curved ducts of square cross section. The aim is to investigate the influence of the curvature radius Rc on the flow and the heat transfer. We consider three different curvature radii : 4Dh, 7Dh and 11Dh (Dh hydraulic diameter). We observe a rise in the number of streamwise vortices of Görtler type on the unstable concave wall when the curvature radius decreases. The main effect is a strong intensification of the secondary flows with the reduction of Rc: a rise of 100 % of the intensity between the smaller and the higher case of the curvature radius. We determine the influence of Rc on heat transfer by considering the case of convex wall heating. Due to the modification of the secondary flows, we observe an enhancement of the heat flux for the smaller value of the curvature radius, specially close to the sidewalls.
000125616 6531_ $$aTurbulence
000125616 6531_ $$aCurvature effects
000125616 6531_ $$aLarge Eddy Simulation
000125616 700__ $$0243094$$g171834$$aMünch, Cecile
000125616 700__ $$aMétais, Olivier
000125616 7112_ $$d2005$$cPoitiers$$aDirect and large Eddy Simulation VI
000125616 773__ $$tDirect and large Eddy Simulation VI
000125616 8564_ $$zURL
000125616 8564_ $$uhttps://infoscience.epfl.ch/record/125616/files/dles6_munch.pdf$$zn/a$$s2042022
000125616 909C0 $$xU10309$$0252135$$pLMH
000125616 909CO $$qGLOBAL_SET$$pconf$$ooai:infoscience.tind.io:125616$$pSTI
000125616 937__ $$aLMH-CONF-2008-022
000125616 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000125616 980__ $$aCONF