Hi Ahbishek,

Have you made any progress on this yet? To generate a “.bc” file you can extract the mesh xml file of the boundary region using the extract module of nekmesh. In this case you have to the relevant composite and do something like

NekMesh -m extract:surf=XX file2D.xml filebc.xml

where XX is the number of the composite for that boundary.

You can then solve a pdf on this mesh to generate a “.fld” file that you can call a “.bc” file. Alternatively you can use one of the interpolation routines to interpolate some other data (i.e. RANS data) to this domain. 

Hope this helps.

Cheers,
Spencer.



Spencer Sherwin FREng, FRAeS
Head of Aerodynamics Section,
Director of Research Computing Service,
Professor of Computational Fluid Mechanics,
Department of Aeronautics,
South Kensington Campus,
Imperial College London, SW7 2AZ,  UK
Phone: +44 (0)20 7594 5052

On 4 Dec 2020, at 15:47, Abhishek Kumar <abhishek.kir@gmail.com> wrote:

This email from abhishek.kir@gmail.com originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list to disable email stamping for this address.
 
Dear friends, 

I am trying to use boundary conditions from a file. I followed section "3.3.5.5" of the user guide, and attempted the example of "ChanFlow2D_bcsfromfiles.xml". Code runs perfectly with the given boundary of the .bc files. However, I am struggling to create a ".bc" file. 

How are the ".bc" files created for "ChanFlow2D_bcsfromfiles.xml" example?

Is it possible to use ASCII data in the ".bc" files?

With regards
Abhishek 


--
---------------------------------------------------------------------------------------
Abhishek Kumar
Assistant Professor (Research)
Centre for Fluid and Complex Systems
Coventry University, Coventry CV15FB
The United Kingdom
Phone: +44 24 7765 9150
Mobile: +44 7464026494
---------------------------------------------------------------------------------------
_______________________________________________
Nektar-users mailing list
Nektar-users@imperial.ac.uk
https://mailman.ic.ac.uk/mailman/listinfo/nektar-users