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Thanks Tanmoy for your suggestion.<div><br><div>You are right, for a eddy viscosity type of turbulent model, the Channel example is a good starting point (though, I think it should be considerably modified to be used in a case with a different geometry compared to a channel). But I was thinking of using sort of wall model when employing the explicit filtering of velocity field as a LES model.</div><div><br></div><div>Thanks,</div><div>Mohsen</div><div><br><div><div>On 24-Dec-14, at 11:23 PM, <<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div>Hi Mohsen,</div><div><br></div><div>For LES with near wall modelling, you have to develop your own script in .usr file. There are no in-built routines except eddy_visc() in turbChannel example. If you use eddy-viscosity type of near wall models in LES, you can modify the scripts and write your own eddy-viscosity routines in uservp. </div><div><br></div><div>Thanks, </div><div>Tanmoy</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div>Best Regards,<br></div>Tanmoy<br></div></div></div> <br><div class="gmail_quote">On Thu, Dec 25, 2014 at 12:47 AM, <span dir="ltr"><<a href="mailto:nek5000-users@lists.mcs.anl.gov" target="_blank">nek5000-users@lists.mcs.anl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello all,<br> <br> I have a question regarding LES capability of Nek.<br> I know that the explicit filtering introduced in Nek can be effective for velocity field to provide sort of eddy viscosity modeling. Nevertheless, there should be some form of modeling for the near wall regions, since it is almost infeasible to have DNS like resolution in such regions for problems with relatively high Reynolds number and large scale geometries. I have seen SFR assemblies example on the Nek web in which LES used, however, I am not sure if that was an LES with near-wall resolution or with near-wall modeling.<br> <br> So I was wondering if anyone has any experience of using Nek LES with near wall models, or kind of hybrid RANS-LES approaches.<br> <br> Thanks,<br> Mohsen<br> <br> <br> ______________________________<u></u>_________________<br> Nek5000-users mailing list<br> <a href="mailto:Nek5000-users@lists.mcs.anl.gov" target="_blank">Nek5000-users@lists.mcs.anl.<u></u>gov</a><br> <a href="https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users" target="_blank">https://lists.mcs.anl.gov/<u></u>mailman/listinfo/nek5000-users</a><br> </blockquote></div><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Nek5000-users mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:Nek5000-users@lists.mcs.anl.gov">Nek5000-users@lists.mcs.anl.gov</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users">https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users</a></div> </blockquote></div><br></div></div></body></html>