cell coarsening behavior

[Lei Qiao]

Dear all,

 

 In 2D case, coarsening a cell will merge 4 children cells into their parent cell.

 Then, what will happen if these 4 children cells have different coarsen and refine flags?

 For example, one of the  4 children cells is marked to be refined, another one 

 is marked to be coarsened, and the rest two cells have no flag. Then, what will happen

 in this case?

Best,

Lei

[Wolfgang Bangerth]

On 09/18/2015 10:41 AM, Lei Qiao wrote:
> In 2D case, coarsening a cell will merge 4 children cells into their
> parent cell. Then, what will happen if these 4 children cells have
> different coarsen and refine flags?

Coarsening will only happen if all children are marked for coarsening.

> For example, one of the 4 children cells is marked to be refined,
> another one is marked to be coarsened, and the rest two cells have no
> flag. Then, what will happen in this case?

The cells marked for refinement will be refined. The coarsening flags on
the other cells will be ignored. Refinement trumps coarsening.

Cheers
W.

--
------------------------------------------------------------------------
Wolfgang Bangerth email: bang...@math.tamu.edu
www: http://www.math.tamu.edu/~bangerth/