[Nek5000-users] Computing higher order derivatives

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

Hello
For doing stability analysis I need upto third derivatives of velocity. Is
this already available in nek ? I tried to compute derivatives of the nek
solution using chebfun but the second and higher derivatives are coming out
to be discontinuous ? This is expected I suppose, since the solution is
only C^0. Can I repeatedly use gradm1 to get higher derivatives ? Does
gradm1 do some projection ?

Thanks
praveen
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