[Nek5000-users] Time derivative of Scalar field

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

Hey Paul,

In my case, the time step is very small, and I want the scalars (initially
a small gaussian blob in the center of the cylindrical domain) to hit the
wall. For that to happen I need too many files to print out. Right now I am
printing them out at 0.1*(vertical diffusion time) and get say 100 files to
hit the wall. While my time step is 1e-4 * (vertical diffusion time) for RB
convection.

Thanks,
Saikat

Saikat Mukherjee,
PhD Student,
Paul Research Group - http://www.me.vt.edu/mpaul/
Engineering Science and Mechanics,
Virginia Tech.

On Mon, Apr 24, 2017 at 12:20 PM, <nek5000-users at lists.mcs.anl.gov> wrote:

>
> Hi Saikat,
>
> Any reason to not save a few time steps and apply finite differences?
>
> Paul
>
> ------------------------------
> *From:* nek5000-users-bounces at lists.mcs.anl.gov [
> nek5000-users-bounces at lists.mcs.anl.gov] on behalf of
> nek5000-users at lists.mcs.anl.gov [nek5000-users at lists.mcs.anl.gov]
> *Sent:* Monday, April 24, 2017 11:10 AM
> *To:* nek5000-users at lists.mcs.anl.gov
> *Subject:* [Nek5000-users] Time derivative of Scalar field
>
> Hello Neks,
>
> I want to find out the time derivative of Scalar field in my Rayleigh
> Benard calculations. Can you give me any idea how to go about it? Right now
> I get the scalar field only along with the primitive variables. But I want
> to get the time derivative field of the scalars (dc/dt).
>
> Thanks,
> Saikat
>
> Saikat Mukherjee,
> PhD Student,
> Paul Research Group - http://www.me.vt.edu/mpaul/
> Engineering Science and Mechanics,
> Virginia Tech.
>
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