<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Hello Neks,<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>I was setting up a mesh of NACA foil in 3D with periodic BC on both sides. Since there was some problem with converting BC's from ICEM to NEK5000. I gave a space as BC and then using prex I fill up the empy spaces by using periodic Auto button.</div><div><br data-mce-bogus="1"></div><div>But its running for a long time. It means its running through the same elements again and again.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>I tired on a simple case (example a cube). it worked well.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>The difference between the NACA case and cube is that, along the spanwise direction of NACA I did not give any elements (i just give a thickness to the mesh) but for the cube there were 2 elements in Z direction.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>So could you please tell me how can I solve this problem?<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Thanks in advance<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Sijo GEORGE<br data-mce-bogus="1"></div></div></body></html>