Re: [Libmesh-users] dynamically add/remove dofs

2017-01-27 Thread Roy Stogner
On Fri, 27 Jan 2017, Manav Bhatia wrote: > If I create multiple elements that occupy the same (exact) spatial > domain, but with distinct nodes (multiple nodes defined at the same > spatial point), would there be any negative implication for > ReplicatedMesh or ParallelMesh data structures? If y

Re: [Libmesh-users] dynamically add/remove dofs

2017-01-27 Thread Manav Bhatia
If I create multiple elements that occupy the same (exact) spatial domain, but with distinct nodes (multiple nodes defined at the same spatial point), would there be any negative implication for ReplicatedMesh or ParallelMesh data structures? This is in relation to the implementation of XFEM w

Re: [Libmesh-users] dynamically add/remove dofs

2017-01-27 Thread Roy Stogner
On Fri, 27 Jan 2017, Manav Bhatia wrote: The subdomain approach sounds promising. I will look into this and the SCALAR variable. SCALAR you want to avoid for locally supported variables in fully implicit solves. We generate dense rows and columns for each SCALAR dof, which is not what you w

Re: [Libmesh-users] dynamically add/remove dofs

2017-01-27 Thread John Peterson
On Fri, Jan 27, 2017 at 9:02 AM, Manav Bhatia wrote: > Thanks for the clarification, John. > > Do you know if there have been XFEM implementations using libMesh in your > group or elsewhere in the research community? > Yes, there is an XFEM module in MOOSE, https://github.com/idaholab/moose/tree

Re: [Libmesh-users] dynamically add/remove dofs

2017-01-27 Thread Roy Stogner
On Fri, 27 Jan 2017, John Peterson wrote: > On Fri, Jan 27, 2017 at 8:34 AM, Manav Bhatia wrote: > >>What I have in mind is a two-phase fluid problem with some interface >> boundary that is evolving with time. Then, if I choose to use XFEM or >> Lagrange multipliers at the interface, then th

Re: [Libmesh-users] dynamically add/remove dofs

2017-01-27 Thread Manav Bhatia
Thanks for the clarification, John. Do you know if there have been XFEM implementations using libMesh in your group or elsewhere in the research community? Regards, Manav > On Jan 27, 2017, at 9:54 AM, John Peterson wrote: > > > > On Fri, Jan 27, 2017 at 8:34 AM, Manav Bhatia

Re: [Libmesh-users] dynamically add/remove dofs

2017-01-27 Thread John Peterson
On Fri, Jan 27, 2017 at 8:34 AM, Manav Bhatia wrote: > Hi, > >I am curious if libMesh allows frequent addition/deletion of dofs to a > system. > >What I have in mind is a two-phase fluid problem with some interface > boundary that is evolving with time. Then, if I choose to use XFEM or >

[Libmesh-users] dynamically add/remove dofs

2017-01-27 Thread Manav Bhatia
Hi, I am curious if libMesh allows frequent addition/deletion of dofs to a system. What I have in mind is a two-phase fluid problem with some interface boundary that is evolving with time. Then, if I choose to use XFEM or Lagrange multipliers at the interface, then the nodes/elements w