dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

** Attachment added: "bisection_zoom.png"
   https://bugs.launchpad.net/bugs/735588/+attachment/1910337/+files/bisection_zoom.png

** Changed in: dolfin
    Milestone: None => 1.1.0

-- 
You received this bug notification because you are a member of DOLFIN
Team, which is subscribed to DOLFIN.
https://bugs.launchpad.net/bugs/735588

Title:
  Mesh refinement broken

Status in DOLFIN:
  Confirmed

Bug description:
  Mesh refinement breaks on some occasions and gives meshes with hanging
  nodes. This happens both using bisection (Rivara) refinement and
  regular cut refinement close to a reentrant corner.

  The hanging nodes appear when the mesh is heavily refined only in the
  vicinity of the corner (which appears more often using either Dorfler
  marking or fixed fraction refinement with a small refinement
  fraction).

  Test case is a 2D mesh (channel_with_flap) present in the cbc.solve
  repository.