[Nek5000-users] Impose inflow conditions from another simulation

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

Well my first code is serial calculation. It actually is nothing more but a
matlab script for the Falkner-Skan-Cook boundary layer.
The calculation in Nek would be parallel as I'd like to investigate the
influence of a roughness element in a boudary layer flow.
I can eventually modify my interpolation routine output if you want one
particular input format.

JC

2010/12/14 <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
>>
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