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Software to simulate heat transfer for additive manufacturing

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@stvdwtt Here is the draft of the JOSS paper. We can either iterate on the PR or work on the branch directly. It's up to you. Here are the requirements...

This is a step towards https://github.com/adamantine-sim/adamantine/issues/190. This pull request replaces `std::vector` with `HeatSources` that contains all heat sources as Kokkos::Views and loops over them in its member functions. With this...

I needed to reconfigure deal.II multiple times since I didn't look into the file that checks the configuration. It's easier to print all the configuration problems at once.

Currently we assume that the heat source is always directed downward. In many DED applications it's possible to rotate the build plate using the positioner to create more complex geometries...

It should be straightforward to compute the global minimum time step for a simulation, assuming that we know the max thermal conductivity, the minimum coarse mesh element size, and the...

The hourglass demonstration case ([link](https://github.com/adamantine-sim/demonstration-cases/tree/main/aop_hourglass)) hits a divide-by-zero error on multiple MPI processes. Evidently this has been a problem for a while and is independent of the problem in #278....

https://github.com/dealii/dealii/pull/16745 updated the SolverGMRES implementation and `deal.II/lac/la_vector.h` was removed in https://github.com/dealii/dealii/commit/d22e218017b8577437eb4fd36315dc6bf8653988.

After #270 neither the hourglass demonstration case nor the Okuma curved wall demonstration case work anymore. Both hang somewhere during initialization. We should have an integration test with an imported...

- [ ] Matrix-free BCs on GPU - [ ] Heat source on GPU - [x] FE_Nothing on GPU

Context: With AMR activated we can add material in refined areas that corresponds to some but not all of the child elements of a element in the coarse mesh. Current...