Hello<div>I am solving the 3-D Taylor-Green problem as described here </div><div><br></div><div><a href="http://www.dlr.de/as/desktopdefault.aspx/tabid-8170/13999_read-35550/">http://www.dlr.de/as/desktopdefault.aspx/tabid-8170/13999_read-35550/</a></div>
<div><a href="http://www.as.dlr.de/hiocfd/case_c3.5.pdf">C3.5 Direct Numerical Simulation of the Taylor-Green Vortex at Re = 1600</a></div><div><br></div><div>using NEK.</div><div><br></div><div>I use</div><div><br></div>
<div>lx1 = 10</div><div>lx2 = lx1-2</div><div>ldx = 15</div><div><br></div><div>No of elements = 14^3 or 28^3</div><div><br></div><div>The evolution of dissipation rate with time is shown in attached pdf. </div><div><br></div>
<div><div>f=0.0 indicates no filtering and f=0.05 means filter parameter P103.</div></div><div><br></div><div>Use of filter seems to capture peak dissipation rate better but still some difference is seen. The DG results with similar number of dofs in the problem description give good estimate of peak rate. So I expect NEK results to improve further and would like to ask for any advice. Should I try with larger amount of filtering ?</div>
<div><br></div><div>I have attached my SIZE and rea files.</div><div><br></div><div>Thanks</div><div>praveen</div>