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</o:shapelayout></xml><![endif]--></head><body lang=SL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Vabimo vas na 5. predavanje iz sklopa "Kolokviji na IJS" v letu 2016/17, ki bo <strong><span style='color:red'>v torek, 25. oktobra 2016, ob 13. uri </span></strong><span style='color:red'>v Veliki predavalnici Instituta »Jožef Stefan«</span> na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu <a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>. <o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<o:p></o:p></p><p class=MsoNormal><b><span lang=EN-US style='mso-fareast-language:ZH-CN'>dr. Sofiane Benhamadouche<o:p></o:p></span></b></p><p class=MsoNormal><i><span lang=EN-US style='mso-fareast-language:ZH-CN'>Électricité de France (EDF) Research and Development, Chatou, Francija<o:p></o:p></span></i></p><p class=MsoNormal><b><span style='font-size:14.0pt'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:16.0pt'>Modeliranje turbulence v enofaznih nestisljivih tokovih v jedrski tehnologiji<o:p></o:p></span></b></p><p class=MsoNormal style='text-align:justify'><span style='font-size:11.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>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 <i>Code_Saturne, </i>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. <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>Predavanje bo v angleščini.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><strong><span style='font-family:"Calibri",sans-serif;color:red'>Lepo vabljeni!</span></strong><strong><span style='font-weight:normal'><o:p></o:p></span></strong></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><span style='font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:SL'><br clear=all style='page-break-before:always'></span><p class=MsoNormal><span style='color:black'>We invite you to the 5th Institute colloquium in the academic year 2016/17. The colloquium will be held </span><b><span style='color:red'>on Tuesday October 25, 2016 at 1 PM</span></b><span style='color:red'> in <b>the main Institute lecture hall</b></span><span style='color:black'>, Jamova 39, Ljubljana. To read the abstract click </span><span style='color:#1F497D'><a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>. </span><span style='color:black'>Past colloquia are posted on</span><span style='color:#1F497D'> <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'>********************************************<b><o:p></o:p></b></p><p class=MsoNormal><b><span lang=EN-US>dr. Sofiane Benhamadouche<o:p></o:p></span></b></p><p class=MsoNormal><i><span lang=EN-US>Électricité de France (EDF) Research and Development, Chatou, France<o:p></o:p></span></i></p><p class=MsoNormal><b><span style='font-size:16.0pt;mso-fareast-language:ZH-CN'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span lang=EN-US style='font-size:16.0pt'>Turbulence modeling for incompressible single phase flows in nuclear engineering<o:p></o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span lang=EN-US style='font-size:16.0pt'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>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 <i>Code_Saturne</i>, 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.<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Cordially invited!<o:p></o:p></p></div></body></html>