[Nek5000-users] Using Cartesian grid lookup table in Nekton

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

Hi,

Thanks for the reply. My problem is f is given as a discrete data set
described in finite difference grid. I want to interpolate this to 'ffx'
like you said in my .usr file. Would like to know how to proceed.

Thanks,
Saikat

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

On Wed, May 30, 2018 at 1:36 PM, <nek5000-users at lists.mcs.anl.gov> wrote:

> Let's consider
>
> ffx = f(x,y,z)
>
> here f is an user function (something you have to provide) which get
> evaluated at x,y,z (your grid points). Interpolation is required if f is
> given by a discrete data set.
>
> hth
>
>
> -----Original message-----
> > From:nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
> > Sent: Wednesday 30th May 2018 19:19
> > To: nek5000-users <nek5000-users at lists.mcs.anl.gov>
> > Subject: Re: [Nek5000-users] Using Cartesian grid lookup table in Nekton
> >
> > Hi,
> >
> > Thanks for the reply. The look up table is in a finite difference grid.
> Are you saying I can still feed it to the .usr file and it should be fine?
> >
> > Thanks,
> > Saikat
> > <br clear="all" />Saikat Mukherjee,
> > PhD Student,
> > Paul Research Group - http://www.me.vt.edu/mpaul/ <
> http://www.me.vt.edu/mpaul/>
> > Engineering Science and Mechanics,
> > Virginia Tech.
> >
> > On Sat, May 26, 2018 at 10:54 PM,  <nek5000-users at lists.mcs.anl.gov
> <mailto:nek5000-users at lists.mcs.anl.gov>> wrote:
> > Hi Saikat,
> >
> > You can always do the reading from the look up table from .usr file, at
> once then feed the data to your ffx ffy and ffz through a common block.
> >
> > On Thu, May 24, 2018 at 10:55 PM,  <nek5000-users at lists.mcs.anl.gov
> <mailto:nek5000-users at lists.mcs.anl.gov>> wrote:
> > Hey all,
> >
> > Just following up on the query. Would appreciate any input.
> >
> > Thanks,
> > Saikat
> > <br clear="all" />Saikat Mukherjee,
> > PhD Student,
> > Paul Research Group - http://www.me.vt.edu/mpaul/ <
> http://www.me.vt.edu/mpaul/>
> > Engineering Science and Mechanics,
> > Virginia Tech.
> >
> > On Tue, May 22, 2018 at 4:47 PM, Saikat Mukherjee <msaikat6 at vt.edu
> <mailto:msaikat6 at vt.edu>> wrote:
> > Hey Neks,
> >
> > I have a forcing function which is in the form of a look up table in X-Y
> cartesian grid. I would like to use this forcing function in the 2-D fluid
> momentum equation that Nekton solves. Is there a way to do this in the .usr
> file or elsewhere?
> >
> > Thanks,
> > Saikat
> >
> >
> > <br clear="all" />Saikat Mukherjee,
> > PhD Student,
> > Paul Research Group - http://www.me.vt.edu/mpaul/ <
> http://www.me.vt.edu/mpaul/>
> > Engineering Science and Mechanics,
> > Virginia Tech.
> >
> >
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