Re: [Libmesh-users] adaptivity criterion

2010-05-01 Thread Roy Stogner
On Sat, 1 May 2010, Boyce Griffith wrote: > On 5/1/10 1:41 PM, Roy Stogner wrote: >> >> On Sat, 1 May 2010, Boyce Griffith wrote: >> >>> If I do this manually, do I set flags only for active elements, or do >>> I need to flag all elements? >> >> Not all element, but parents with children to be

Re: [Libmesh-users] adaptivity criterion

2010-05-01 Thread Boyce Griffith
On 5/1/10 1:41 PM, Roy Stogner wrote: > > On Sat, 1 May 2010, Boyce Griffith wrote: > >> If I do this manually, do I set flags only for active elements, or do >> I need to flag all elements? > > Not all element, but parents with children to be coarsened need to > have the children marked COARSEN

Re: [Libmesh-users] adaptivity criterion

2010-05-01 Thread Roy Stogner
On Sat, 1 May 2010, Boyce Griffith wrote: > If I do this manually, do I set flags only for active elements, or do I need > to flag all elements? Not all element, but parents with children to be coarsened need to have the children marked COARSEN and the parents COARSEN_INACTIVE. --- Roy ---

Re: [Libmesh-users] adaptivity criterion

2010-05-01 Thread Boyce Griffith
On 5/1/10 1:23 PM, Roy Stogner wrote: > > On Sat, 1 May 2010, Boyce Griffith wrote: > >> and to prevent children of inactive elements which >> satisfy this threshold from being coarsened. All other elements would >> be flagged for coarsening. > > You mean that children of inactive elements which

Re: [Libmesh-users] adaptivity criterion

2010-05-01 Thread Roy Stogner
On Sat, 1 May 2010, Boyce Griffith wrote: > I have a very simple adaptivity heuristic which I'd like to use to drive > mesh generation --- I want to flag active elements for refinement if the > maximum difference in a solution variable within that element is greater > than some threshold, An Err

[Libmesh-users] adaptivity criterion

2010-05-01 Thread Boyce Griffith
Hi, Folks -- I have a very simple adaptivity heuristic which I'd like to use to drive mesh generation --- I want to flag active elements for refinement if the maximum difference in a solution variable within that element is greater than some threshold, and to prevent children of inactive elemen