[Getdp] Line elements at boundaries
Erich Muschka Schulz
Erich.Schulz at newcastle.edu.au
Tue Apr 26 06:03:53 CEST 2005
Hi all:
I was wondering about the existence of line elements (elements with two
nodes to each element) at the boundary of my model?
When I mesh my model, gmsh creates line elements at the very outer
periphery of the model. I think this is occurring because I have
declared a "physical entity" Boundary, which contains all of the lines
on the outer edge of the model. I did this so that I could specify the
nodal values at the boundary.
I wasn't aware that line elements were required at the edge of models,
in particular, as I am constraining the nodal values at the periphery to
be zero. As far as I am aware, the triangular elements should be
sufficient to describe the field solution at the periphery. I am unclear
about the impact of the line elements on the final result for the 2D
magnetic vector potential solution. I am only interested in obtaining
the values of the vector potential.
If the line elements will cause problems, how can I identify all of the
nodes at the periphery, without creating all of the line elements in the
mesh?
Cheers
Erich