Hi Vidhi,

Did you get this sorted. I suspect you need to use the peralign option which ensures periodic composites have the elements ordered in a consistent manner and triangular faces are aligned so that the singular vertex is pointing in the same direction. 

Cheers,

Spencer.

On 16 Mar 2021, at 18:53, Vidhi Zala <vidhi.zala@utah.edu> wrote:

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Hi all,

Sorry, here is the user-guide section screenshot.

V

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  / |  '     \    | |--------. Vidhi Zala
 (  )         0   | |        | School of Computing
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     /  \-'~;      .--------.  
    /  __/~| ._-""||        |  vidhi.zala@utah.edu 
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On Tue, Mar 16, 2021 at 12:53 PM Vidhi Zala <vidhi.zala@utah.edu> wrote:

Hi everyone,

I am trying to implement a 3D advection example on a cube with composite elements (hex+tets+pyramids+quads+tri).

I am using periodic boundary conditions. I am getting the following error:

"Unable to determine face orientation".

I referred to the relevant section of user guide (please see screenshot). I am unable to understand how should I change the rotation argument such that I can simulate a periodic flow. It would really help if I get some more details about this.

Many thanks, 

V

   ,-~~-.___._.
  / |  '     \    | |--------. Vidhi Zala
 (  )         0   | |        | School of Computing
  \_/-, ,----'    | |        | Scientific Computing and Imaging Institute
     ====         !_!-v---v--. University of Utah
     /  \-'~;      .--------.  
    /  __/~| ._-""||        |  vidhi.zala@utah.edu 
  =(  _____|_|____||________|  http://sci.utah.edu/people/vidhi.html 
I support Ruff Haven Crises Shelter for Homeless Pets. Consider a donation today :)

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