Stephen DeWitt

icon indicating a website link https://scholar.google.com/citations?user=PnfnEFgAAAAJ&hl=en icon indicating an email [email protected]

icon company Oak Ridge National Laboratory (@ORNL) icon location Oak Ridge, TN icon location Computational materials scientist specializing in phase field modeling, high-performance computing, and additive manufacturing

Results 74 issues of Stephen DeWitt

Add discussion of documentation about accessing tensor elements

Documentation: General

Add capability to set the number of output points per element in the parameters file

By default, deal.II outputs only the nodal values. However, for higher order elements this makes the solution appear choppier than it is in reality. In PRISMS-PF we compensate for this...

Type: Feature

Improve error message for missing boundary conditions

Type: Error handling

Improvements to grain remapping

A few ideas (not all will make v2.2): - Give a warning if the grains cannot all be reassigned without overlap - Store the bounds of the grain more efficiently...

Type: Feature
Type: Error handling

Finish implementation of implicit time stepping

enhancement

Generate error if the vtk file with the initial conditions isn't found

Currently, if one has in the parameters file to read the initial conditions from a vtk file, but that file doesn't exist, the simulation hangs. It should throw an exception...

Type: Error handling

Split up solveIncrement

This method is getting too large. There should be separate functions for the explicit update, nonlinear solver, and fully time-independent solves.

Print out warning if the nonlinear solver hits the max number of iterations

Type: Error handling

Link source files in the unit tests

Implement general Neumann BCs

We've had a non-functional implementation of non-zero Neumann BCs for a while. What I didn't realize until now is that some coefficients (and the time step size for a time-dependent...