<HTML><BODY><span style="font-family: Arial, Tahoma, Verdana, sans-serif;" data-mce-style="font-family: Arial, Tahoma, Verdana, sans-serif;">For this geometry, I tried the low Re (~10^3), but the number of iterations for the </span><span style="font-family: Arial, Tahoma, Verdana, sans-serif;" data-mce-style="font-family: Arial, Tahoma, Verdana, sans-serif;">velx, vely, velz</span><span style="font-family: Arial, Tahoma, Verdana, sans-serif;" data-mce-style="font-family: Arial, Tahoma, Verdana, sans-serif;"> also did not exceed 1. What do you think? Why do I have the same number of iterations for the low Re?</span><br><br><br><blockquote style="border-left-color: #0857a6;" data-mce-style="border-left-color: #0857a6;">Вторник, 4 декабря 2018, 19:56 +07:00 от nek5000-users--- via Nek5000-users <nek5000-users@lists.mcs.anl.gov>:<br><br><div id=""><div class="js-helper js-readmsg-msg"><div id="style_15439281610000011626_BODY"><div class="class_1543998833"><div dir="ltr"><br><div>Your problem has very low viscosity, so there will be very few velocity</div><div>iterations.</div><div> </div><div>I would suggest turning off the filter if it's not helping -- but most likely</div><div>there is another issue (e.g., perhaps needing more resolution for the target Reynolds</div><div>number).</div><div> </div><div>For a wing, it might not be a bad idea to first run a 2D airfoil at the target conditions</div><div>just to get an idea of the meshing requirements for the target Re.</div><div> </div><div>hth,</div><div> </div><div>Paul</div><div> </div></div><br><div class="gmail_quote_mailru_css_attribute_postfix"><div dir="ltr">On Tue, Dec 4, 2018 at 6:21 AM nek5000-users--- via Nek5000-users <<a href="https://e.mail.ru/compose/?mailto=mailto%3anek5000%2dusers@lists.mcs.anl.gov" rel=" noopener noreferrer" target="_blank" data-mce-href="https://e.mail.ru/compose/?mailto=mailto%3anek5000%2dusers@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>> wrote:</div><blockquote class="gmail_quote_mailru_css_attribute_postfix" style="border-left-color: #cccccc; margin: 0px 0px 0px 0.8ex; padding-left: 1ex;" data-mce-style="border-left-color: #cccccc; margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"><div><br><span style="font-family: Arial, Tahoma, Verdana, sans-serif;" data-mce-style="font-family: Arial, Tahoma, Verdana, sans-serif;">Hi, Neks!<br>I am working with a complex geometry which was built in gambit. I have some questions. <br>1) When I start Nek5000, I have only 1 itteration for velx, vely,velz, but for the preassure field itterations >30. How can it be possible? <br></span>2) When I set p103=0.1 in .rea file, Courant <font color="#222222" face="sans-serif"><span style="font-size: 14px;" data-mce-style="font-size: 14px;">number </span></font>increases and becomes >1 very fast. How does the filtration effect on the Courant number?<br>I attached my .rea file and logfile.<br><a href="https://drive.google.com/open?id=1YEV2f5Mllqenhu-rk39YJ84_1XHYjC_H" rel=" noopener noreferrer" target="_blank" data-mce-href="https://checklink.mail.ru/proxy?es=S4JQrOri%2BIKDvkeHDmQQelcLwbo5nLwE2Ps1CuJEP80%3D&egid=11DEwbrA30E0%2By8OGFdIYTizmfNkshNqPrcofRBCwwg%3D&url=https%3A%2F%2Fclick.mail.ru%2Fredir%3Fu%3Dhttps%253A%252F%252Fdrive.google.com%252Fopen%253Fid%253D1YEV2f5Mllqenhu-rk39YJ84_1XHYjC_H%26c%3Dswm%26r%3Dhttp%26o%3Dmail%26v%3D2%26s%3D7ae27f78c3259304">https://drive.google.com/open?id=1YEV2f5Mllqenhu-rk39YJ84_1XHYjC_H</a> <br><br><font color="#222222" face="sans-serif"><span style="font-size: 14px;" data-mce-style="font-size: 14px;"><strong><a href="https://drive.google.com/open?id=1jRKI_zEnb78cR7uXFi3mE0txk6FN3EXQ" rel=" noopener noreferrer" target="_blank" data-mce-href="https://checklink.mail.ru/proxy?es=S4JQrOri%2BIKDvkeHDmQQelcLwbo5nLwE2Ps1CuJEP80%3D&egid=11DEwbrA30E0%2By8OGFdIYTizmfNkshNqPrcofRBCwwg%3D&url=https%3A%2F%2Fclick.mail.ru%2Fredir%3Fu%3Dhttps%253A%252F%252Fdrive.google.com%252Fopen%253Fid%253D1jRKI_zEnb78cR7uXFi3mE0txk6FN3EXQ%26c%3Dswm%26r%3Dhttp%26o%3Dmail%26v%3D2%26s%3Daa0953ab8a4aff13">https://drive.google.com/open?id=1jRKI_zEnb78cR7uXFi3mE0txk6FN3EXQ</a> <br></strong></span></font></div>_______________________________________________<br>Nek5000-users mailing list<br><a href="https://e.mail.ru/compose/?mailto=mailto%3aNek5000%2dusers@lists.mcs.anl.gov" rel=" noopener noreferrer" target="_blank" data-mce-href="https://e.mail.ru/compose/?mailto=mailto%3aNek5000%2dusers@lists.mcs.anl.gov">Nek5000-users@lists.mcs.anl.gov</a><br><a href="https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users" rel=" noopener noreferrer" target="_blank" data-mce-href="https://checklink.mail.ru/proxy?es=S4JQrOri%2BIKDvkeHDmQQelcLwbo5nLwE2Ps1CuJEP80%3D&egid=11DEwbrA30E0%2By8OGFdIYTizmfNkshNqPrcofRBCwwg%3D&url=https%3A%2F%2Fclick.mail.ru%2Fredir%3Fu%3Dhttps%253A%252F%252Flists.mcs.anl.gov%252Fmailman%252Flistinfo%252Fnek5000-users%26c%3Dswm%26r%3Dhttp%26o%3Dmail%26v%3D2%26s%3D68c573cdf35d044e">https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users</a></blockquote></div></div></div><div>_______________________________________________<br>Nek5000-users mailing list<br><a href="https://e.mail.ru/compose?To=Nek5000%2dusers@lists.mcs.anl.gov" data-mce-href="https://e.mail.ru/compose?To=Nek5000%2dusers@lists.mcs.anl.gov">Nek5000-users@lists.mcs.anl.gov</a><br><a href="https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users" target="_blank" data-mce-href="https://checklink.mail.ru/proxy?es=S4JQrOri%2BIKDvkeHDmQQelcLwbo5nLwE2Ps1CuJEP80%3D&egid=11DEwbrA30E0%2By8OGFdIYTizmfNkshNqPrcofRBCwwg%3D&url=https%3A%2F%2Fclick.mail.ru%2Fredir%3Fu%3Dhttps%253A%252F%252Flists.mcs.anl.gov%252Fmailman%252Flistinfo%252Fnek5000-users%26c%3Dswm%26r%3Dhttp%26o%3Dmail%26v%3D2%26s%3D68c573cdf35d044e">https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users</a></div><div> </div></div></div></blockquote></BODY></HTML>