[Nek5000-users] 3-D Taylor-Green problem

[nek5000-users at lists.mcs.anl.gov]

Hello
I am solving the 3-D Taylor-Green problem as described here

http://www.dlr.de/as/desktopdefault.aspx/tabid-8170/13999_read-35550/
C3.5 Direct Numerical Simulation of the Taylor-Green Vortex at Re =
1600<http://www.as.dlr.de/hiocfd/case_c3.5.pdf>

using NEK.

I use

lx1 = 10
lx2 = lx1-2
ldx = 15

No of elements = 14^3 or 28^3

The evolution of dissipation rate with time is shown in attached pdf.

f=0.0 indicates no filtering and f=0.05 means filter parameter P103.

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 ?

I have attached my SIZE and rea files.

Thanks
praveen
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