[Nek5000-users] Impose inflow conditions from another simulation

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

JC,

Are you doing this in serial or parallel?

The main thing is to dump out the points at inflow, along with
some type of discriminator so that you can subsequently
associate function values (from your other code) with those
points when you want to read them back in.

In serial, this is easy - a bit trickier in parallel.

Let me know which case is of interest and we can generate
something for you.

Paul


On Tue, 14 Dec 2010, nek5000-users at lists.mcs.anl.gov wrote:

> Hi Nek's,
>
> I have a question on how to impose inflow boundary conditions that are not
> analytical.
> I have for instance a Blasius velocity profile computed thanks to another
> code. I would like to impose this given profile as my inflow condition.
> At the moment I am using a polynomial expansion of the velocity profile in
> the userbc subroutine, however I would like to do things properly.
>
> I can interpolate the profile from my previous code onto the wall normal GLL
> discretization. That would give me a .dat file containing three arrays:
> first one is the y-discretization, second and third ones are the velocity
> (u,v) at these points. Question is how could I use these data to impose my
> blasius profile as inflow boundary condition?
>
> I assume it is rather straightforward, however I am not sure how and which
> indices should vary.
>
> Best regards,
> JC
>