[Nek5000-users] low order interpolation

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

Hi Tanmoy

thanks for the quick answer, unfortunately I didn't commit this kinds of
errors. I have already used my matlab routine for other cases and it worked
well, so I'm pretty sure that there isn't errors. The only differences is
that I'm using this routine to interpolate the hpts.in points on more
complex grid and on a turbulent field. It seams that I have the Runge's
phenomenon. Is this possible with the hpts routine?

Sincerely
Alessandro





2015-11-20 17:29 GMT+01:00 <nek5000-users at lists.mcs.anl.gov>:

> Hi Alessandro,
>
> I use exactly the same procedure for my case. Just wondering, by any
> chance, are there any points in hpts.in which are outside bounds of the
> original domain, or you may resize the domain in userdat(), while
> postprocessing in nek5000.
>
> Best Regards,
> Tanmoy
>
> On Fri, Nov 20, 2015 at 6:46 AM, <nek5000-users at lists.mcs.anl.gov> wrote:
>
>> Dear neks
>>
>> I don't know how Nek5000 performs the interpolation with hpts() routine
>> but I have some problem when I use this last. Using Matlab I built an
>> hpts.in file that contains the points of a structured and not constant
>> mesh, then using Nek in postprocessing  mode I evaluate the values of
>> velocity an pressure in this points. When I reshape the hpts.out in order
>> to visualize my domain, there are many zones that have no-sense values!. I
>> performed the same interpolation in tecplot and it works fine.
>>
>> my question is: there's any way to perform a first order interpolation in
>> Nek5000?
>>
>> Sincerely
>> Alessandro
>>
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