timspainNERSC
commented
4 months ago Task list
- [x] Convert from ModelArray to CG via DG in
CGDynamicsKernel::setData() - [x] Convert from CG to ModelArray in
CGDynamicsKernel::getDG0Data() - [x] Remove all reference to CG from ModelArrayDetails
- [x] Do not read in CG dimensions in ParaGridIO
- [ ] Remove all reference to CG from restart files
- [x] Remove dependency of
DummyDynamicsKernelon CG - [ ] Test
The use of Continuous Galerkin mathematics is currently necessary to ensure fluxes remain well defined. However, this is only a mathematical convenience internal to the ice dynamics part of nextSIM-DG. The finite element variation of the fields can be stored either as DG polynomial coefficients or as CG samples. The two representations can be converted into one another losslessly. Therefore, it is possible to eliminate all reference to CG arrays outside of the parts of the dynamics that depend on them.
Fields such as the ice velocity components will be stored in DG form within the restart files. The data will also be transmitted as the DG coefficients through to the
setData()function calls of the dynamics. Here, the data set within the CG arrays will be received by the CG parts of the dynamics kernel and the data, held as DG components will be interpolated and stored as CG arrays.On output for a restart file, the CG array will be fitted to obtain the DG components. This DG field is all that is ever seen by the rest of the model and the restart file.