[Nek5000-users] Compute the derivatives

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

Hi Nek's,

I have a home-made global stability code, but in order to use it I first 
need to compute the derivatives of my base flow: dUdX, dUdY, dVdX, dVdY.
How could one compute these derivatives using Nek 5k and drop them along 
with X Y U V in the blah.f**** file (or perhaps another .f**** file) ? I 
assume I have to make use of the subroutine *dudxyz 
(du,u,rm1,sm1,tm1,jm1,imsh,isd)*, but I'm not sure what to put as inputs.

Regards,
JC
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