<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Hello everyone<br></div><div><br data-mce-bogus="1"></div><div>I have been troubled by the exactly same problem with Ali for the last two months with the turbulent channel case. When I increase elements, the flow is laminarized even though the Re is quite big (10000). I tried many different ways. Even added a constant random forcing, but the disturbance just disappear. (because the disturbance shape is not the same as that in linear stability theory, it is possible that the disturbance just decay. )<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>How I finally solve this problem is running a coarse mesh calculation first, and then interpolating the result to fine mesh. Then I got a sustaining turbulence and the result is quite satisfying. I hope this could solve Ali's problem.<br data-mce-bogus="1"></div><div><br></div><div>However, I still cannot understand why increasing resolution would laminarize flow. hoping someone else could explain the problem.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Regards<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div data-marker="__SIG_PRE__"><div>Bien cordialement<br></div><div><br></div><div>Zhenrong JING<br></div><div><br></div><div>Doctorant (Doctor Candidate)<br></div><div><br></div><div>LHEEA</div><div><br></div><div>Ecole Centrale de Nantes<br></div><div><br></div><div><span class="_Xbe">1 Rue de la Noƫ, 44321 Nantes, France<br></span></div></div></div></body></html>