[Nek5000-users] Restart using second order scheme

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

Hi,
if you do not do full restart, your first time step will be first order. 
Particularly important is also that if you do not have a good pressure 
initial condition, you might get large pressure errors, which might 
require you to use the coupled (Uzawa) algorithm (for PnPn-2).
Philipp

On 2018-02-13 12:30, nek5000-users at lists.mcs.anl.gov wrote:
> Dear Neks:
> 
>    I am using second order time time integration scheme for the 
> computations.
> Since the second order scheme uses the flow field at (n) and (n-1) to 
> compute
> the solution at (n+1) we need two files to do a full restart. If, 
> however, we do
> not do a full restart and simply load the file using restart feature in 
> .rea file,
> how is the second order scheme implemented for the first time step?
> 
> Thank you.
> 
> Best wishes,
> NN.
> 
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