This is ASPECT newsletter #83.
It automatically reports recently merged features and discussions about the ASPECT mantle convection code.
Below you find a list of recently proposed or merged features:
#3180: Fix Tosi Case 4 benchmark (proposed by anne-glerum)
#3179: Add new solver scheme: single advection, iterated Newton Stokes (proposed by anne-glerum)
#3178: Add composition density formulation (proposed by gassmoeller)
#3177: Fix spaces, reference and spelling (proposed by anne-glerum; merged)
#3176: Move assignment to old_solution to the only place it is used (proposed by gassmoeller; merged)
#3175: Fix floating point exception caused by accessing timestep prematurely (proposed by gassmoeller)
#3174: Correct behavior of VoF interface refinement algorithm near MPI process boundaries (proposed by class4kayaker)
#3173: Replace dynamic cast in cookbooks and benchmarks (proposed by gassmoeller; merged)
#3172: Fix deprecation message with deal.II 9.1 (proposed by gassmoeller; merged)
#3171: add missing doxygen comment (proposed by tjhei; merged)
#3170: update parameters (proposed by tjhei; merged)
#3169: Better Compositing model and AdditionalOutputs (proposed by tjhei)
#3167: Use the same initialization for operator splitting as for normal time stepping (proposed by gassmoeller; merged)
#3159: Add pull request template (proposed by gassmoeller; merged)
#3157: Rename isothermal to isentropic compression (proposed by gassmoeller; merged)
#3137: Updated: Material model that sets a constant viscosity in the lithosphere (proposed by SophieCoulson; merged)
A list of all major changes since the last release can be found at this website .
Thanks for being part of the community!
Let us know about questions, problems, bugs or just share your experience by visting our [forum](https://community.geodynamics.org/c/aspect), or by opening issues or pull requests on [Github](https://www.github.com/geodynamics/aspect). Additional information can be found at our [official website](https://aspect.geodynamics.org/), and CIG's [ASPECT website](https://geodynamics.org/cig/software/aspect/).