# ASPECT Newsletter #219 **URL:** \ **Category:** ASPECT\ **Created:** [July 8, 2025, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-219/4204 "2025-07-08T10:00:34Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![rgassmoeller](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/rgassmoeller/32/49_2.png) [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Post date:** [July 8, 2025, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-219/4204/1 "2025-07-08T10:00:34Z")
Hello everyone! This is ASPECT newsletter #219. 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: [#6606](https://github.com/geodynamics/aspect/pull/6606): change linearization with reaction (implemented by [RanpengLi](https://github.com/RanpengLi)) [#6605](https://github.com/geodynamics/aspect/pull/6605): Python: add a test (implemented by [tjhei](https://github.com/tjhei)) [#6604](https://github.com/geodynamics/aspect/pull/6604): Python: initialize and add a unittest (implemented by [tjhei](https://github.com/tjhei)) [#6603](https://github.com/geodynamics/aspect/pull/6603): fix #define warning (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6602](https://github.com/geodynamics/aspect/pull/6602): testsuite: force correct deal.II path (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6601](https://github.com/geodynamics/aspect/pull/6601): Allow ‘compositing’ material model for entropy method (implemented by [gassmoeller](https://github.com/gassmoeller)) [#6600](https://github.com/geodynamics/aspect/pull/6600): Ensure particle manager is destroyed before triangulation and mapping (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [tjhei](https://github.com/tjhei)) [#6599](https://github.com/geodynamics/aspect/pull/6599): Fix default parameter value to point to existing file (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [tjhei](https://github.com/tjhei)) [#6598](https://github.com/geodynamics/aspect/pull/6598): Code cleanup of particle distribution function (implemented by [gassmoeller](https://github.com/gassmoeller)) [#6596](https://github.com/geodynamics/aspect/pull/6596): fix doxygen comment and update parameters (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth)) [#6595](https://github.com/geodynamics/aspect/pull/6595): Add a tester with deal.II 9.6 (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [bangerth](https://github.com/bangerth)) [#6594](https://github.com/geodynamics/aspect/pull/6594): Move point density function code from ParticleDistributionStatistics to ParticlePDF (implemented by [JarettBakerDunn](https://github.com/JarettBakerDunn); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6593](https://github.com/geodynamics/aspect/pull/6593): Fix non-matching braces. (implemented by [bangerth](https://github.com/bangerth); reviewed by [naliboff](https://github.com/naliboff)) [#6592](https://github.com/geodynamics/aspect/pull/6592): Make sure we re-run cmake when we add files. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6591](https://github.com/geodynamics/aspect/pull/6591): Minor code simplification. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6590](https://github.com/geodynamics/aspect/pull/6590): Document a piece of code. (implemented by [bangerth](https://github.com/bangerth)) [#6588](https://github.com/geodynamics/aspect/pull/6588): Use the more modern interface to adding constraints. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6587](https://github.com/geodynamics/aspect/pull/6587): Make index handling more efficient. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6585](https://github.com/geodynamics/aspect/pull/6585): Fix the grammar of a variable name. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6584](https://github.com/geodynamics/aspect/pull/6584): Implement an interface that external surface deformation tools can use. (implemented by [bangerth](https://github.com/bangerth)) [#6583](https://github.com/geodynamics/aspect/pull/6583): Move the global functions in main.cc into an anonymous namespace. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6581](https://github.com/geodynamics/aspect/pull/6581): Allow for the use of adiabatic pressure for tian 2019 reaction model (implemented by [danieldouglas92](https://github.com/danieldouglas92); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6580](https://github.com/geodynamics/aspect/pull/6580): Do not mark variables in header files as ‘static’. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6579](https://github.com/geodynamics/aspect/pull/6579): Do not guard inclusion of \ with DEAL\_II\_WITH\_MPI. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6578](https://github.com/geodynamics/aspect/pull/6578): Break the include cycle between global.h and compat.h. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6577](https://github.com/geodynamics/aspect/pull/6577): Disentangle compat.h a bit. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei)) [#6576](https://github.com/geodynamics/aspect/pull/6576): Qualify functions with std::. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei)) [#6575](https://github.com/geodynamics/aspect/pull/6575): Guard only those parts with #ifdef that need to be guarded. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6574](https://github.com/geodynamics/aspect/pull/6574): Break an include cycle. (implemented by [bangerth](https://github.com/bangerth)) [#6573](https://github.com/geodynamics/aspect/pull/6573): Move print\_aspect\_header() into namespace aspect. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6572](https://github.com/geodynamics/aspect/pull/6572): Move material into namespace aspect. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6571](https://github.com/geodynamics/aspect/pull/6571): Remove an unnecessary header include. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6570](https://github.com/geodynamics/aspect/pull/6570): Add a necessary header file. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6569](https://github.com/geodynamics/aspect/pull/6569): Have different cmake variables for header and source files. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6568](https://github.com/geodynamics/aspect/pull/6568): Move compatibility material into namespace aspect. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6567](https://github.com/geodynamics/aspect/pull/6567): Forward-declare WorldBuilder::World. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6566](https://github.com/geodynamics/aspect/pull/6566): Include where necessary. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6565](https://github.com/geodynamics/aspect/pull/6565): Include \ where necessary. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6564](https://github.com/geodynamics/aspect/pull/6564): Add a necessary header include. (implemented by [bangerth](https://github.com/bangerth)) [#6563](https://github.com/geodynamics/aspect/pull/6563): Move a typedef into namespace aspect. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6562](https://github.com/geodynamics/aspect/pull/6562): Open namespace aspect only once. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6561](https://github.com/geodynamics/aspect/pull/6561): Add necessary header. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6560](https://github.com/geodynamics/aspect/pull/6560): Move the declaration of a macro to the file where we have all the other macros. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6559](https://github.com/geodynamics/aspect/pull/6559): Move function into namespace aspect. Also add necessary headers. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6556](https://github.com/geodynamics/aspect/pull/6556): Track free water from each lithology in the Tian 2019 Reaction Model (implemented by [danieldouglas92](https://github.com/danieldouglas92)) [#6555](https://github.com/geodynamics/aspect/pull/6555): Add Steinberger material model data file (implemented by [poulamiiroy](https://github.com/poulamiiroy)) [#6554](https://github.com/geodynamics/aspect/pull/6554): Fix the comment description. (implemented by [alarshi](https://github.com/alarshi); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6553](https://github.com/geodynamics/aspect/pull/6553): Fix a DOI in references.bib (implemented by [danieldouglas92](https://github.com/danieldouglas92); reviewed by [bangerth](https://github.com/bangerth)) [#6552](https://github.com/geodynamics/aspect/pull/6552): Avoid bare pointers for initial topography model (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [bangerth](https://github.com/bangerth)) [#6551](https://github.com/geodynamics/aspect/pull/6551): Rename box initial topography functions (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [tjhei](https://github.com/tjhei)) [#6549](https://github.com/geodynamics/aspect/pull/6549): Add initial topography implementation for merged box geometry model (implemented by [alarshi](https://github.com/alarshi); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6546](https://github.com/geodynamics/aspect/pull/6546): Modify the plastic dilation terms to reduce noises in effective viscosity (implemented by [YiminJin](https://github.com/YiminJin); reviewed by [gassmoeller](https://github.com/gassmoeller)) [#6445](https://github.com/geodynamics/aspect/pull/6445): GMG: support no averaging for GMG (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller)) And this is a list of recently opened or closed discussions: [#6597](https://github.com/geodynamics/aspect/issues/6597) can not compile plugins with 9.6 (opened) [#6589](https://github.com/geodynamics/aspect/issues/6589) Incorrect constraints in mesh deformation manager? (opened) [#6586](https://github.com/geodynamics/aspect/issues/6586) Make index set handling for mesh deformation plugins more efficient. (opened and closed) [#6582](https://github.com/geodynamics/aspect/issues/6582) Compile ASPECT main branch with deal.ii 9.6 (opened and closed) [#6558](https://github.com/geodynamics/aspect/issues/6558) Build an ASPECT module. (opened) [#6557](https://github.com/geodynamics/aspect/issues/6557) Avoid the use of malloc() and free(). (opened) A list of all major changes since the last release can be found at [this website](https://aspect.geodynamics.org/doc/doxygen/changes_current.html). 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/).