Re: [Libmesh-users] 1D/2D elements in 3D space

[Manav B. <bha...@gm...>]

Thanks! 

So, would the shape function derivatives account the orientation of the element? 

For instance, a 1D element oriented along:   x-axis   vs   y-axis   vs   x=y line. 

In all cases, there is only one shape function defined along the element coordinate. But its derivative wrt x and y will vary. Is this handled for both 1st order and 2nd order Lagrange (for instance)?

-Manav

> On Feb 12, 2018, at 5:06 PM, Roy Stogner <roy...@ic...> wrote:
> 
> 
> On Mon, 12 Feb 2018, Manav Bhatia wrote:
> 
>>  I was looking through some code in FE and noticed some comments
>>  about 1D/2D elements in 3D space. What is the extent of support
>>  for this?
> 
> IIRC:
> 
> If you're using just one or just the other, then the support should be
> complete.
> 
> If you're connecting one to the other (or connecting either/both to 3D
> elements), then you don't get neighbor links for those connections.
> 
> If you're overlapping one on or within the other (e.g. elements which
> occupy the sides of higher dimensional elements) and you want them to
> share DoFs consistently then I think you're limited to LAGRANGE
> variables for those DoFs.
> ---
> Roy