[Nek5000-users] Moving Wall Advice

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

Hi Mike,

A grep in the examples folder under the Nek repository gave me the example 'fs_hydro' as a comparable case. I'd also take a look at the primer http://www.mcs.anl.gov/~fischer/primer.pdf in particular page 16.
You would probably need different boundary conditions since these cases are free surface cases but maybe you can tweak something to get started. 

I am not sure if time dependency for the boundary is covered in any of these examples but you can implement the time advancement in the user file using the same time step as the solver.

Good luck and let us know how it goes,
Oana
________________________________________
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: Tuesday, October 07, 2014 8:34 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: Re: [Nek5000-users] Moving Wall Advice

Hello all,

I have not seen any response on this -- anyone have some thoughts they'd like to share?

Cheers,
Mike

On Oct 3, 2014, at 1:36 PM, <nek5000-users at lists.mcs.anl.gov> <nek5000-users at lists.mcs.anl.gov> wrote:

> Hello Neks,
>
> I'm trying to simulate a flow where one of the boundaries is moving in a manner that requires the mesh to deform as a function of time.   In short, the conditions of the flow will determine how the boundary moves (it's a fluid-structure interaction problem, but the structure is a rigid body suspended in the fluid).
>
> Are there any available examples that would provide guidance?
>
> If not, does anyone out there want to share some wisdom?  For example, I understand that I will need IFMVBD = True, and I will need "mv" boundary conditions specified in the .rea file, but in which routine should I modify the mesh node locations and velocities?
>
> I found a similar question in the archive under the subject "what parameters for a moving wall induced velocity problem?" but there didn't seem to be any follow-up responses.
>
> Thanks in advance.
>
> Cheers,
> Mike
>
>
>
>
>
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