<div dir="ltr">Try decreasing DT (timestep), as it seems like a CFL issue.<br></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 Fri, Feb 26, 2016 at 11:12 PM, <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"><div dir="ltr"><div><div><div><div>Dear Sir<br><br></div>I am currently running a simulation related to oscillating airfoil. Whenever I increase the reynolds number (>10000), the simulation stops running after few time steps showing the statement as shown below:<br><br>Step 1652, t= 4.4604000E-02, DT= 2.7000000E-05, C= 2.938 4.2779E+03 3.4404E+00<br> Solving for fluid F T T<br> 1652 Hmholtz VELX: 53 6.3582E-10 1.2153E+03 1.0000E-09<br> 1652 Hmholtz VELY: 53 6.4018E-10 9.5397E+00 1.0000E-09<br> 1652 U-PRES gmres: 64 9.9886E-08 1.0000E-07 4.8269E-01 8.7161E-01 2.3652E+00<br> 1652 4.4604E-02 3.4916E+00 Fluid done<br> CFL, Ctarg! 5.4135660200985729 0.50000000000000000 <br> call outfld: ifpsco: F<br><br> 1653 4.4604E-02 Write checkpoint:<br><br> 1653 4.4604E-02 OPEN: naca0012.fld05 <br> <br> Emergency exit: 1653 time = 4.46039999999989986E-002<br> Latest solution and data are dumped for post-processing.<br> *** STOP ***<br><br></div>Kindly guide me on how to resolve this issue.<br><br></div>T/R<br></div>Prashanth Mohanasundaram<br></div>
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