[Nek5000-users] Restart using second order scheme

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

Thanks very much Philipp.

NN.


On 02/13/2018 01:13 PM, nek5000-users at lists.mcs.anl.gov wrote:
> 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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