Multiple fields in a single Sieve section done
At this point, only used for parameters of fault constitutive models.
GENERAL
HDF5 output done
Output into a single HDF5 file or an HDF5 file with raw binary files for the datasets. Datasets are written using MPI I/O if available in both cases. Add !.Xdmf metadata files associated with HDF5 files to permit reading of HDF5 files with ParaView and Visit.
Uniform global refinement done (98%)
QUASI-STATIC
Added 2-D plane strain versions of the 3-D generalized Maxwell viscoelastic rheology. done
DYNAMIC
Numerical damping via viscosity done
Added numerical damping via a viscosity parameter that is independent of the bulk constitutive model. The viscosity is applied during the time integration.
COMPUTATIONAL SCIENCE
None
Version 1.7 (Fall 2011)
OPTIMIZATION
Multiple fields in a single Sieve section intermediate (0%)
Parameters for bulk constitutive models
Parameters and fields related to fault implementation
Will reduce memory use and provide speedup due to better use of memory cache.
CLEANUP
Separate elastic solution into !elasticPrestep() function easy (0%)
Add —initialize_only property to Problem easy (0%)
Permit users to stop simulation before time stepping in order to diagnose parameter settings.
GENERAL
Refactor initial fault tractions easy (5%)
Create Nucleation object with spatial and temporal perturbation of tractions from initial value
QUASI-STATIC
Add strain hardening/softening to Drucker-Prager elastoplastic models.
DYNAMIC
Compute stable time step for explicit time integration easy (5%)
Attenuation via generalized Maxwell model (bulk and shear relaxation) intermediate (50%)
COMPUTATIONAL SCIENCE
Scalable mesh distribution intermediate (0%)
Permit running large problems where the mesh cannot fit on a single compute node.
Accelerate FE integrations using GPUs difficult (25%)
Will provide significant speedup to simulations run by many users because most are running on desktop machines that have GPUs.
Version 2.0
OPTIMIZATION
TBD
CLEANUP
TBD
GENERAL
Moment tensor point sources
Moment tensor point sources provide a mesh independent deformation source that is better suited for Green’s function calculations than slip on a fault surface via cohesive cells. difficult
QUASI-STATIC
Time-step based on strain rate intermediate
Pressure field for incompressible elasticity problems expert
DYNAMIC
TBD
COMPUTATIONAL SCIENCE
Use KD tree search algorithm to allow output of time histories at an arbitrary location difficult
Use interpolated meshes (cells, faces, edges, vertices) to permit higher order basis functions expert
Support for arbitrary number of solution fields (e.g., displacement, temperature, pressure) expert
Adjust integrations to support multi-physics calculations.
Beyond Version 2.0
OPTIMIZATION
TBD
CLEANUP
TBD
GENERAL
Combined prescribed slip / spontaneous rupture fault condition
Use fault constitutive model to control slip on fault except during episodes of prescribed slip. Need some way to describe when to turn on/off prescribed slip.
