IJS KOLOKVIJ, Torek, 25. 10. 2016; ob 13. uri; dr. Sofiane Benhamadouche

[Tanja Debevec]

Vabimo vas na 5. predavanje iz sklopa "Kolokviji na IJS" v letu 2016/17, ki bo v torek, 25. oktobra 2016, ob 13. uri v Veliki predavalnici Instituta »Jožef Stefan«  na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu http://www.ijs.si/ijsw/Koledar_prireditev, posnetke preteklih predavanj pa na http://videolectures.net/kolokviji_ijs. 

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dr. Sofiane Benhamadouche

Électricité de France (EDF) Research and Development, Chatou, Francija

 

Modeliranje turbulence v enofaznih nestisljivih tokovih v jedrski tehnologiji

 

Kolokvij bomo začeli s kratko predstavitvijo raziskav in razvoja pri EDF in njegovega Oddelka za mehaniko tekočin, energijo in okolje. Po pregledu osnovnih numeričnih orodij, ki jih uporabljamo na različnih področjih, se bomo osredotočili na Code_Saturne, v EDF razvito odprto programsko kodo za simulacijo dinamike tekocin (CFD) v jedrski tehniki. Najprej bomo predstavili modeliranje turbulence s koncepti, najbolj znanimi pod kraticama (U)RANS (unsteady Reynolds-averaged Navier-Stokes) in LES (large eddy simulations). Zatem bomo izpostavili nekaj idej in napotkov, ki se jih je dobro držati pri simulacijah turbulence s tovrstnimi modeli. Primeri, s katerimi bomo te ideje ilustrirali, se nanašajo na uporabo modelov Reynoldsovega napetostnega tenzorja v kompleksnih tokovih, na primerjavo empiričnih modelov mejne plasti in modelov z izračunanim tokovnim poljem, na kriterije za drobljenje mreže v LES… Naposled bomo priporočili direktno numerično simulacijo in natančne LES modele kot orodja pomembna za teoretične raziskave turbulence ter za razvoj in preverjanje RANS modelov. 

Predavanje bo v angleščini.

Lepo vabljeni!

 

 

 




We invite you to the 5th Institute colloquium in the academic year 2016/17. The colloquium will be held on Tuesday October 25, 2016 at 1 PM in the main Institute lecture hall, Jamova 39, Ljubljana. To read the abstract click  http://www.ijs.si/ijsw/Koledar_prireditev. Past colloquia are posted on  http://videolectures.net/kolokviji_ijs.

 

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dr. Sofiane Benhamadouche

Électricité de France (EDF) Research and Development, Chatou, France

 

Turbulence modeling for incompressible single phase flows in nuclear engineering

 

 

The colloquium will start with a brief presentation of EDF R&D and its Fluid Mechanics, Energy and Environment Department. Then, after an overview of the main numerical tools utilized in different fields, the talk will focus on the use of Code_Saturne, EDF in-house and open-source computational fluid dynamic (CFD) software, in nuclear engineering applications. First, an introduction to turbulence modeling will be given through the concepts of (U)RANS (unsteady Reynolds-averaged Navier-Stokes) and LES (large eddy simulations). Then, the presentation will promote some ideas and guidelines one should keep in mind while running CFD simulations with these turbulent models. The illustrations will address the use of Reynolds stress models for complex flows, modeling turbulent heat fluxes, wall resolved models vs. wall modeled in RANS, mesh refinement criteria in LES… Application of the most accurate approaches in turbulence modelling: DNS (direct numerical simulation) and wall resolved LES for the understanding of flow and RANS validation will be finally encouraged.

 

Cordially invited!

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