[Nek5000-users] Passive Scalar Initialization

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

Hi Alireza,

You can alway reinitialize any field, so either start with or without,
whichever is easiest.  If it's a long and expensive run (esp. from
a passive scalar standpoint, for example if you have very low Pr), then
you might choose to not carry the PS along till you get to your desired
background flow state.  Otherwise, PS typically costs much less than the
hydro, so carrying PS along is not an excessive burden and the setup
and logistics overhead is sometimes easier just to deal with it at
the outset.

I hope this helps.

Cheers,

Paul


On Sun, 15 Jul 2012, nek5000-users at lists.mcs.anl.gov wrote:

> Hi,
>
> I want to start solving the passive scalar equation after the background flow 
> field has reached certain characteristics. Is it possible to defer the 
> solution of the passive scalar and then initialize it at sometime t>0? In 
> this case, should I include the passive scalar boundary condition data in the 
> rea and usr files from the beginning?
>
> Thanks for your help.
>
> Regards,
> Alireza
>
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