[Nek5000-users] Impose localized noise

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

Well, I would like to impose random noise in the whole domain (which I then
localize in the present calculation through the use of a gaussian) at least
for one time step. The aim is just to trigger transition from a steady state
to another state.

So it is indeed a function of space, and it may be a function of time also
if I want zero mean noise but this is not necessary as I'd like to impose it
just for a very few time steps.
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