ASPECT Newsletter #98

Hello everyone!

       This is ASPECT newsletter #98.

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:

#3405: Ability to interpolate multiple properties (proposed by sac-bsa)
#3404: Improve allocation of matrix blocks (proposed by gassmoeller)
#3401: Three new features for the gravity_point_values postprocessor (proposed by LudovicJnnt)
#3400: Immediately overwrite the statistics file upon restart. (proposed by bangerth; merged)
#3398: update parameters (proposed by tjhei; merged)
#3397: Use correct dates in a changelog entry. (proposed by bangerth; merged)
#3395: Ensure three lines between function defintions in particle interface files (proposed by MFraters; merged)
#3394: Fix up a comment that is awkwardly worded. (proposed by bangerth; merged)
#3393: Fix a doxygen flag. (proposed by bangerth; merged)
#3392: Avoid a function if deal.II has a substitute. (proposed by bangerth; merged)
#3391: Add particle property post initialize function (proposed by MFraters; merged)
#3389: Only update the statistics file if possible, rather than writing it anew. (proposed by bangerth; merged)
#3388: use IndexSet::split_by_block (proposed by tjhei; merged)
#3387: add missing override to WorldBuilder files (proposed by tjhei; merged)
#3386: Simplify the logic of do_output_statistics. (proposed by bangerth; merged)
#3385: Avoid using deprecated functions. (proposed by bangerth)
#3384: Fix deprecation warnings (proposed by gassmoeller; merged)
#3383: Add particle plugin existence and order checks (proposed by MFraters; merged)
#3382: gmres for gmg cheap (proposed by tcclevenger; merged)
#3381: fix hdf5 output after restart (proposed by tjhei; merged)
#3378: add depth offset parameter for the world builder. (proposed by MFraters; merged)
#3375: Add mapping as argument to some boundary value calls (proposed by gassmoeller; merged)
#3168: Refactor operator splitting function (proposed by gassmoeller; merged)
#3019: Add option to track noninitial plastic strain (proposed by naliboff; merged)

And this is a list of recently opened or closed discussions:

#3403 Initial topography causes mesh holes (opened)
#3402 initial topography before refinement (opened)
#3399 Should initial topography be part of the mesh deformation module? (opened)
#3396 I/O errors when MPI-IO is not available (opened)
#3390 I Think Our Solve for the Coefficients in the Particle Bilinear Interpolation is Unstable and Ill-Advised (opened)
#3360 deprecated-copy warning (closed)
#3359 Chunk+free surface unwanted deformation (closed)

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](, or by opening issues or pull requests on [Github](
Additional information can be found at our [official website](, and CIG's [ASPECT website](