# ASPECT Newsletter #107

**URL:** <https://community.geodynamics.org/t/aspect-newsletter-107/1390>\
**Category:** ASPECT\
**Created:** [August 11, 2020, 4:01pm UTC](https://community.geodynamics.org/t/aspect-newsletter-107/1390 "2020-08-11T16:01:28Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**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:** [August 11, 2020, 4:01pm UTC](https://community.geodynamics.org/t/aspect-newsletter-107/1390/1 "2020-08-11T16:01:28Z")

</div>

Hello everyone!

This is ASPECT newsletter #107.  
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:

[#3757](https://github.com/geodynamics/aspect/pull/3757): Use common spacing between functions in a few places. (implemented by [bangerth](https://github.com/bangerth))  
[#3756](https://github.com/geodynamics/aspect/pull/3756): world builder: disable unity builds temporarily (implemented by [tjhei](https://github.com/tjhei); reviewed by [MFraters](https://github.com/MFraters))  
[#3755](https://github.com/geodynamics/aspect/pull/3755): Compute edot ii in a function (implemented by [EstherHeck](https://github.com/EstherHeck))  
[#3754](https://github.com/geodynamics/aspect/pull/3754): played with timestepping and added my results in the readme (implemented by [EstherHeck](https://github.com/EstherHeck))  
[#3753](https://github.com/geodynamics/aspect/pull/3753): cmake make unity groups. (implemented by [MFraters](https://github.com/MFraters))  
[#3751](https://github.com/geodynamics/aspect/pull/3751): [WIP] Extend initial mesh deformation interface (implemented by [gassmoeller](https://github.com/gassmoeller))  
[#3750](https://github.com/geodynamics/aspect/pull/3750): update melt force vector test (implemented by [jdannberg](https://github.com/jdannberg))  
[#3749](https://github.com/geodynamics/aspect/pull/3749): fix gravity test. (implemented by [MFraters](https://github.com/MFraters); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3748](https://github.com/geodynamics/aspect/pull/3748): fix error in world builder for unity build (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth))  
[#3746](https://github.com/geodynamics/aspect/pull/3746): fix mesh refinement level in if-else statement (implemented by [mibillen](https://github.com/mibillen))  
[#3745](https://github.com/geodynamics/aspect/pull/3745): add particle advection substep update call. (implemented by [MFraters](https://github.com/MFraters))  
[#3744](https://github.com/geodynamics/aspect/pull/3744): Cookbooks files movearound (implemented by [alarshi](https://github.com/alarshi))  
[#3743](https://github.com/geodynamics/aspect/pull/3743): Have time as a postprocessor particle property (implemented by [EstherHeck](https://github.com/EstherHeck))  
[#3742](https://github.com/geodynamics/aspect/pull/3742): Require at least one nonlinear iteration (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3741](https://github.com/geodynamics/aspect/pull/3741): Move VectorFunctionFromVelocityFunctionObject to Utilities namespace (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [bangerth](https://github.com/bangerth))  
[#3740](https://github.com/geodynamics/aspect/pull/3740): fix deal.II 9.2 instantiation bug in qprojector.h (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth))  
[#3739](https://github.com/geodynamics/aspect/pull/3739): Modified calculate\_isostrain\_viscosities function inputs. (implemented by [alarshi](https://github.com/alarshi))  
[#3738](https://github.com/geodynamics/aspect/pull/3738): Don’t use ConstraintMatrix. Use AffineConstraints. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3737](https://github.com/geodynamics/aspect/pull/3737): Mark a variable as ‘const’. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3736](https://github.com/geodynamics/aspect/pull/3736): remove some old deal.II stuff from compat.h (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth))  
[#3735](https://github.com/geodynamics/aspect/pull/3735): fix deprecation warnings in tests (implemented by [tjhei](https://github.com/tjhei); reviewed by [MFraters](https://github.com/MFraters))  
[#3734](https://github.com/geodynamics/aspect/pull/3734): fix indentation (implemented by [jaustermann](https://github.com/jaustermann); reviewed by [tjhei](https://github.com/tjhei))  
[#3733](https://github.com/geodynamics/aspect/pull/3733): Perplex lookup volume fractions (implemented by [bobmyhill](https://github.com/bobmyhill))  
[#3732](https://github.com/geodynamics/aspect/pull/3732): fix postprocessing nonlinear iterations in Newton schemes (implemented by [jdannberg](https://github.com/jdannberg); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3731](https://github.com/geodynamics/aspect/pull/3731): Implement a time update() function for the gravity function plugin (implemented by [jaustermann](https://github.com/jaustermann); reviewed by [tjhei](https://github.com/tjhei))  
[#3730](https://github.com/geodynamics/aspect/pull/3730): CMake: clean up unity file handling (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth))  
[#3729](https://github.com/geodynamics/aspect/pull/3729): corrected/clarified references (implemented by [cedrict](https://github.com/cedrict))  
[#3727](https://github.com/geodynamics/aspect/pull/3727): Expansion global limiter (implemented by [anne-glerum](https://github.com/anne-glerum); reviewed by [MFraters](https://github.com/MFraters))  
[#3726](https://github.com/geodynamics/aspect/pull/3726): adding X periodic option for .prm (implemented by [kchotalia](https://github.com/kchotalia))  
[#3725](https://github.com/geodynamics/aspect/pull/3725): Isosurface mesh refinment plugin (implemented by [MFraters](https://github.com/MFraters))  
[#3724](https://github.com/geodynamics/aspect/pull/3724): Build world builder with unity (implemented by [MFraters](https://github.com/MFraters); reviewed by [tjhei](https://github.com/tjhei))  
[#3723](https://github.com/geodynamics/aspect/pull/3723): [WIP] add Peierls creep rheology (implemented by [naliboff](https://github.com/naliboff))  
[#3722](https://github.com/geodynamics/aspect/pull/3722): Deleted redundant test for Bilinear Least Squares Particle Interpolat… (implemented by [egpuckett](https://github.com/egpuckett))  
[#3721](https://github.com/geodynamics/aspect/pull/3721): slightly loosen the tolerance for the Newton tests. (implemented by [MFraters](https://github.com/MFraters); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3716](https://github.com/geodynamics/aspect/pull/3716): Make global constants ‘constexpr’ variables. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3715](https://github.com/geodynamics/aspect/pull/3715): Avoid a warning about missing braces. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3713](https://github.com/geodynamics/aspect/pull/3713): Adjoint equations (implemented by [jaustermann](https://github.com/jaustermann))  
[#3712](https://github.com/geodynamics/aspect/pull/3712): some small matrix free cleanup (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth))  
[#3711](https://github.com/geodynamics/aspect/pull/3711): add brackets to newton solver assembly. (implemented by [MFraters](https://github.com/MFraters))  
[#3710](https://github.com/geodynamics/aspect/pull/3710): manual: suggest using git apply (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth))  
[#3709](https://github.com/geodynamics/aspect/pull/3709): Optimize the newton solver scheme rebuild flags. (implemented by [MFraters](https://github.com/MFraters))  
[#3708](https://github.com/geodynamics/aspect/pull/3708): Simplify newton stokes rhs additional terms logic. (implemented by [MFraters](https://github.com/MFraters); reviewed by [bangerth](https://github.com/bangerth))  
[#3707](https://github.com/geodynamics/aspect/pull/3707): PerpleX lookup now uses column labels to assign properties (implemented by [bobmyhill](https://github.com/bobmyhill); reviewed by [bangerth](https://github.com/bangerth))  
[#3706](https://github.com/geodynamics/aspect/pull/3706): Set mesh displacement to zero (implemented by [anne-glerum](https://github.com/anne-glerum); reviewed by [bangerth](https://github.com/bangerth))  
[#3705](https://github.com/geodynamics/aspect/pull/3705): Newton Stokes failing for a linear problem (implemented by [tjhei](https://github.com/tjhei))  
[#3704](https://github.com/geodynamics/aspect/pull/3704): Fixed the url link and the LIBDAP environment variable (implemented by [kneumiller](https://github.com/kneumiller); reviewed by [tjhei](https://github.com/tjhei))  
[#3703](https://github.com/geodynamics/aspect/pull/3703): Output the stress as a tensor, rather than individual scalar components. (implemented by [bangerth](https://github.com/bangerth))  
[#3702](https://github.com/geodynamics/aspect/pull/3702): Minor cleanups. (implemented by [bangerth](https://github.com/bangerth); reviewed by [MFraters](https://github.com/MFraters))  
[#3701](https://github.com/geodynamics/aspect/pull/3701): Improve performance dcpicard and newton solver (implemented by [MFraters](https://github.com/MFraters))  
[#3700](https://github.com/geodynamics/aspect/pull/3700): Fix grammar of error messages. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3699](https://github.com/geodynamics/aspect/pull/3699): Search for correct version of astyle, in case multiple versions exist (implemented by [jperryhouts](https://github.com/jperryhouts))  
[#3698](https://github.com/geodynamics/aspect/pull/3698): Adding option for FK viscosity in visco\_plastic (implemented by [erinheilman](https://github.com/erinheilman); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3698](https://github.com/geodynamics/aspect/pull/3698): Adding option for FK viscosity in visco\_plastic (implemented by [erinheilman](https://github.com/erinheilman); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3697](https://github.com/geodynamics/aspect/pull/3697): Remove a couple of completely unrelated publications. (implemented by [bangerth](https://github.com/bangerth); reviewed by [MFraters](https://github.com/MFraters))  
[#3694](https://github.com/geodynamics/aspect/pull/3694): Update citing aspect (implemented by [ljhwang](https://github.com/ljhwang); reviewed by [bangerth](https://github.com/bangerth))  
[#3693](https://github.com/geodynamics/aspect/pull/3693): fix temperature dependence of viscosity in latent heat models (implemented by [jdannberg](https://github.com/jdannberg); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3692](https://github.com/geodynamics/aspect/pull/3692): Introduce TimeStepping::Manager (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3691](https://github.com/geodynamics/aspect/pull/3691): Add post nonlinear solver signal (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [bangerth](https://github.com/bangerth))  
[#3690](https://github.com/geodynamics/aspect/pull/3690): Modify documentation of filename in asciiboundary. (implemented by [alarshi](https://github.com/alarshi); reviewed by [bangerth](https://github.com/bangerth))  
[#3689](https://github.com/geodynamics/aspect/pull/3689): Fix formatting of a few doc strings. (implemented by [bangerth](https://github.com/bangerth); reviewed by [MFraters](https://github.com/MFraters))  
[#3688](https://github.com/geodynamics/aspect/pull/3688): Removed a now unnecessary compatibility fix (KA) (implemented by [Geoniette](https://github.com/Geoniette); reviewed by [bangerth](https://github.com/bangerth))  
[#3687](https://github.com/geodynamics/aspect/pull/3687): Fixed default viscosity file for depth dependent model (implemented by [mnkajan](https://github.com/mnkajan); reviewed by [bangerth](https://github.com/bangerth))  
[#3686](https://github.com/geodynamics/aspect/pull/3686): AsciiDataLookup: allow directly initializing (implemented by [tjhei](https://github.com/tjhei))  
[#3684](https://github.com/geodynamics/aspect/pull/3684): Fixes and updates to citing\_aspect.bib (implemented by [ljhwang](https://github.com/ljhwang); reviewed by [bangerth](https://github.com/bangerth))  
[#3683](https://github.com/geodynamics/aspect/pull/3683): Lessen reliance on a friend declaration. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3682](https://github.com/geodynamics/aspect/pull/3682): Markup units (implemented by [bobmyhill](https://github.com/bobmyhill); reviewed by [bangerth](https://github.com/bangerth))  
[#3681](https://github.com/geodynamics/aspect/pull/3681): Modify a function to compute reference viscosity (implemented by [gassmoeller](https://github.com/gassmoeller))  
[#3680](https://github.com/geodynamics/aspect/pull/3680): manual.tex: remove trailing whitespace (implemented by [tjhei](https://github.com/tjhei); reviewed by [tjhei](https://github.com/tjhei))  
[#3679](https://github.com/geodynamics/aspect/pull/3679): Fix an error message in normalize.pl. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3678](https://github.com/geodynamics/aspect/pull/3678): Clarify description of some refinement function (implemented by [mibillen](https://github.com/mibillen); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3677](https://github.com/geodynamics/aspect/pull/3677): markup for units in composition reaction (implemented by [bobmyhill](https://github.com/bobmyhill); reviewed by [bangerth](https://github.com/bangerth))  
[#3676](https://github.com/geodynamics/aspect/pull/3676): Add the ability to write data on faces only, not in the domain. (implemented by [bangerth](https://github.com/bangerth))  
[#3675](https://github.com/geodynamics/aspect/pull/3675): Fix .gitignore. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3674](https://github.com/geodynamics/aspect/pull/3674): github actions: do not download from [sourceforge.net](http://sourceforge.net) (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3673](https://github.com/geodynamics/aspect/pull/3673): Fix documentation. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3672](https://github.com/geodynamics/aspect/pull/3672): No need to have two backslashes in .h file documentation. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3671](https://github.com/geodynamics/aspect/pull/3671): Quadratic least squares particle interpolation (implemented by [sac-bsa](https://github.com/sac-bsa))  
[#3670](https://github.com/geodynamics/aspect/pull/3670): fix typos and make text the same for viscoelastic and visco-plastic (implemented by [mibillen](https://github.com/mibillen); reviewed by [naliboff](https://github.com/naliboff))  
[#3669](https://github.com/geodynamics/aspect/pull/3669): Remove unused input parameter (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [tjhei](https://github.com/tjhei))  
[#3668](https://github.com/geodynamics/aspect/pull/3668): Added documentation for points in 3D case. (implemented by [alarshi](https://github.com/alarshi); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3667](https://github.com/geodynamics/aspect/pull/3667): Removed a now unnecessary compatibility fix (implemented by [mfmweerdesteijn](https://github.com/mfmweerdesteijn); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3666](https://github.com/geodynamics/aspect/pull/3666): Removed a now unnecessary compatibility fix (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [bangerth](https://github.com/bangerth))  
[#3665](https://github.com/geodynamics/aspect/pull/3665): Remove dealii compatibility fix (implemented by [EstherHeck](https://github.com/EstherHeck); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3664](https://github.com/geodynamics/aspect/pull/3664): removed a now unnecessary compatibility fix for DEAL-II version (implemented by [mibillen](https://github.com/mibillen); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3663](https://github.com/geodynamics/aspect/pull/3663): Removed a now unnecessary compatibility fix (implemented by [kchotalia](https://github.com/kchotalia); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3662](https://github.com/geodynamics/aspect/pull/3662): Removed a now unnecessary compatibility fix (implemented by [danieldouglas92](https://github.com/danieldouglas92); reviewed by [tjhei](https://github.com/tjhei))  
[#3661](https://github.com/geodynamics/aspect/pull/3661): Removed a now unnecessary compatibility fix (implemented by [Geoniette](https://github.com/Geoniette); reviewed by [bangerth](https://github.com/bangerth))  
[#3660](https://github.com/geodynamics/aspect/pull/3660): Removed a now unnecessary compatibility fix (implemented by [ricitron](https://github.com/ricitron); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3659](https://github.com/geodynamics/aspect/pull/3659): Removed a now unnecessary compatibility fix (implemented by [erinheilman](https://github.com/erinheilman); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3658](https://github.com/geodynamics/aspect/pull/3658): reorganize script folders, move from doc/ (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3655](https://github.com/geodynamics/aspect/pull/3655): add missing instantiation (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3654](https://github.com/geodynamics/aspect/pull/3654): remove stray preprocessor command (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth))  
[#3653](https://github.com/geodynamics/aspect/pull/3653): unity: move some files to the end (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3650](https://github.com/geodynamics/aspect/pull/3650): move VoFHandler implementation into single .cc (implemented by [tjhei](https://github.com/tjhei))  
[#3649](https://github.com/geodynamics/aspect/pull/3649): add .mailmap file to better associate authors (implemented by [tjhei](https://github.com/tjhei); reviewed by [bangerth](https://github.com/bangerth))  
[#3648](https://github.com/geodynamics/aspect/pull/3648): add missing override for particle properties (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3647](https://github.com/geodynamics/aspect/pull/3647): Remove deprecated MaterialModelInputs::cell (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3646](https://github.com/geodynamics/aspect/pull/3646): Jenkins: run testers with -O1 (implemented by [tjhei](https://github.com/tjhei); reviewed by [tjhei](https://github.com/tjhei))  
[#3645](https://github.com/geodynamics/aspect/pull/3645): add deal.II 9.2 changelog (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3644](https://github.com/geodynamics/aspect/pull/3644): cmake: delete trailing whitespace (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3643](https://github.com/geodynamics/aspect/pull/3643): cmake: allow additional cxx flags (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3642](https://github.com/geodynamics/aspect/pull/3642): Maintenance aug2020 (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3641](https://github.com/geodynamics/aspect/pull/3641): github actions: enable -Werror (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3640](https://github.com/geodynamics/aspect/pull/3640): jenkins: remove unity build (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3639](https://github.com/geodynamics/aspect/pull/3639): Speedup some unnecessarily slow tests (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [tjhei](https://github.com/tjhei))  
[#3638](https://github.com/geodynamics/aspect/pull/3638): Address a warning. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3637](https://github.com/geodynamics/aspect/pull/3637): Keep everything of one class in one file. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3636](https://github.com/geodynamics/aspect/pull/3636): github-actions: test no-unity build and unittests (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3634](https://github.com/geodynamics/aspect/pull/3634): Fix a problem with template explicit specializations. (implemented by [bangerth](https://github.com/bangerth); reviewed by [tjhei](https://github.com/tjhei))  
[#3632](https://github.com/geodynamics/aspect/pull/3632): manual: update installation instructions to deal.II 9.2 (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3631](https://github.com/geodynamics/aspect/pull/3631): fix conflicting lib detection for deal.II ubuntu package (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3629](https://github.com/geodynamics/aspect/pull/3629): CI: fix github actions update\_parameters.sh (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3627](https://github.com/geodynamics/aspect/pull/3627): Fix cookbook phase for slow testers (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3626](https://github.com/geodynamics/aspect/pull/3626): jenkins: allow running on release branches (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3625](https://github.com/geodynamics/aspect/pull/3625): jenkins experiments (implemented by [tjhei](https://github.com/tjhei))  
[#3624](https://github.com/geodynamics/aspect/pull/3624): Limit number of MPI ranks for tests (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [tjhei](https://github.com/tjhei))  
[#3623](https://github.com/geodynamics/aspect/pull/3623): CI: add github actions (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3622](https://github.com/geodynamics/aspect/pull/3622): fix error handling in update\_parameters.sh (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3621](https://github.com/geodynamics/aspect/pull/3621): CI: Jenkinsfile make the same (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3620](https://github.com/geodynamics/aspect/pull/3620): indent script: return failure (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3619](https://github.com/geodynamics/aspect/pull/3619): mark test to require world builder (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3618](https://github.com/geodynamics/aspect/pull/3618): enforce test timeout limit in CI (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3614](https://github.com/geodynamics/aspect/pull/3614): enable tests that require deal.II 9.2 (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3598](https://github.com/geodynamics/aspect/pull/3598): Calculate viscosity on phases (implemented by [lhy11009](https://github.com/lhy11009); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3431](https://github.com/geodynamics/aspect/pull/3431): Fix use of invalid iterator (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3023](https://github.com/geodynamics/aspect/pull/3023): [WIP] Move set pointer to mapping (implemented by [anne-glerum](https://github.com/anne-glerum); reviewed by [bangerth](https://github.com/bangerth))

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

[#3752](https://github.com/geodynamics/aspect/issues/3752) Make some member variables use plurals (opened)  
[#3747](https://github.com/geodynamics/aspect/issues/3747) Mesh deformation boundaries not set properly when no Stokes (opened)  
[#3728](https://github.com/geodynamics/aspect/issues/3728) potential compile error with unity build and deal.II 9.2.0 (opened and closed)  
[#3728](https://github.com/geodynamics/aspect/issues/3728) potential compile error with unity build and deal.II 9.2.0 (opened and closed)  
[#3720](https://github.com/geodynamics/aspect/issues/3720) [Meta] Free surface improvements (opened)  
[#3719](https://github.com/geodynamics/aspect/issues/3719) Use the same finite element for mesh deformation and stokes velocity (opened)  
[#3718](https://github.com/geodynamics/aspect/issues/3718) Test mesh deformation algorithm inside nonlinear solvers (opened)  
[#3717](https://github.com/geodynamics/aspect/issues/3717) Improve free surface advection scheme (opened)  
[#3714](https://github.com/geodynamics/aspect/issues/3714) tests/zero\_matrix fails on some machines (opened)  
[#3696](https://github.com/geodynamics/aspect/issues/3696) Correct ‘Casey and Wesnousky’ in manual references. (opened and closed)  
[#3695](https://github.com/geodynamics/aspect/issues/3695) Update ‘in preparation’ References in manual.bib (opened and closed)  
[#3685](https://github.com/geodynamics/aspect/issues/3685) Problem reading Aspect output particles in Paraview (opened)  
[#3657](https://github.com/geodynamics/aspect/issues/3657) Move cookbooks and their documentation into folders (opened)  
[#3656](https://github.com/geodynamics/aspect/issues/3656) GMG and Newton solver (opened)  
[#3652](https://github.com/geodynamics/aspect/issues/3652) Move documentation generation to cmake (opened)  
[#3651](https://github.com/geodynamics/aspect/issues/3651) class instantiations with implementations in different .ccs? (opened and closed)  
[#3635](https://github.com/geodynamics/aspect/issues/3635) Enable tests that were disabled in #3624 (opened)  
[#3633](https://github.com/geodynamics/aspect/issues/3633) clang compile errors with unity builds (opened)  
[#3630](https://github.com/geodynamics/aspect/issues/3630) slow CI since switching to deal.II 9.2 (opened)  
[#3628](https://github.com/geodynamics/aspect/issues/3628) Need to speed up slow tests (opened and closed)  
[#3605](https://github.com/geodynamics/aspect/issues/3605) CI: test timeout not respected (closed)  
[#3341](https://github.com/geodynamics/aspect/issues/3341) Implement a time update() function for the gravity function plugin (closed)  
[#3046](https://github.com/geodynamics/aspect/issues/3046) Use proper markup for units in parameter descriptions (closed)  
[#2929](https://github.com/geodynamics/aspect/issues/2929) reorganize folders/scripts in doc/ (closed)  
[#2655](https://github.com/geodynamics/aspect/issues/2655) illegal instruction 4 on OSX binary image (closed)  
[#2067](https://github.com/geodynamics/aspect/issues/2067) Allow more flexible surface movements (closed)

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/).

---

<div class="post-metadata">

**Author:** ![bangerth](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/bangerth/32/52_2.png) [@bangerth](https://community.geodynamics.org/u/bangerth)\
**Post date:** [August 11, 2020, 4:44pm UTC](https://community.geodynamics.org/t/aspect-newsletter-107/1390/2 "2020-08-11T16:44:30Z")

</div>

> This is ASPECT newsletter #107.

We’re making progress with another spike!

> **[Contributors to geodynamics/aspect](https://github.com/geodynamics/aspect/graphs/contributors)**
>
> A parallel, extensible finite element code to simulate convection in both 2D and 3D models. - Contributors to geodynamics/aspect

🙂

Cheers  
W.

---

<div class="post-metadata">

**Author:** ![egpuckett](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/egpuckett/32/123_2.png) [@egpuckett](https://community.geodynamics.org/u/egpuckett)\
**Post date:** [August 11, 2020, 5:43pm UTC](https://community.geodynamics.org/t/aspect-newsletter-107/1390/3 "2020-08-11T17:43:04Z")

</div>

I noticed. I’m trying to help. 🙂

I have two PRs,

1. The one with @sac-bsa (Mack Gregory) which I am almost 100% certain is ready. However, I want Mack to give the final ‘yes’. We meet today at 4:00 so it will happen sometime today.

2. The VOF Cookbook, which @naliboff reviewed and was prepared to merge even before our spring quarter ended. (I’ve been the bottleneck, since I wanted the last read / edit. ☹ I promised to finish this during the Hackathon or else just tell John N. to merge it if I don’t finish before Friday. Still reading as of yesterday …

It’s great to hear from you!

- G

---

<div class="post-metadata">

**Author:** ![bangerth](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/bangerth/32/52_2.png) [@bangerth](https://community.geodynamics.org/u/bangerth)\
**Post date:** [August 11, 2020, 6:19pm UTC](https://community.geodynamics.org/t/aspect-newsletter-107/1390/4 "2020-08-11T18:19:33Z")

</div>

Remind me of the PR # and I’ll look at it today!  
W.

---

<div class="post-metadata">

**Author:** ![egpuckett](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/egpuckett/32/123_2.png) [@egpuckett](https://community.geodynamics.org/u/egpuckett)\
**Post date:** [August 11, 2020, 6:42pm UTC](https://community.geodynamics.org/t/aspect-newsletter-107/1390/5 "2020-08-11T18:42:24Z")

</div>

Which one? The one with @sac-bsa (Mack Gregory) or the VOF Cookbook.

I’ll send you the one with Mack when we meet today. I’d like a couple of days to look over the final version of the VOF Cookbook. That’s because I wrote a lot of it and would like to see if anything significant has changed. I’ll send that one to you by Thursday at the latest.

Thanks!

- G

---

<div class="post-metadata">

**Author:** ![bangerth](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/bangerth/32/52_2.png) [@bangerth](https://community.geodynamics.org/u/bangerth)\
**Post date:** [August 11, 2020, 7:07pm UTC](https://community.geodynamics.org/t/aspect-newsletter-107/1390/6 "2020-08-11T19:07:53Z")

</div>

OK. I know about the one with @sac-bsa. I can find both – just indicate in  
the PR that it’s ready for review!

---

<div class="post-metadata">

**Author:** ![egpuckett](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/egpuckett/32/123_2.png) [@egpuckett](https://community.geodynamics.org/u/egpuckett)\
**Post date:** [August 11, 2020, 8:52pm UTC](https://community.geodynamics.org/t/aspect-newsletter-107/1390/7 "2020-08-11T20:52:42Z")

</div>

Hi Wolfgang,

We have addressed Rene’s suggestion for #3671. Mack (@sac-bsa) and I wrote it together. We’re ready for your review.

> > Hello Professor Puckett,
> > 
> > I think we did as well, so I merged your PR and it has passed the build and indentation testers. We now are waiting for Rene’s approval to run the tests.
> > 
> > Thank you,
> > 
> > Mack Gregory

If you have a moment, please look at the abstract that we submitted to the Fall AGU that we included in the “_Describe what you did in this PR and why you did it._” part of our PR; namely,

> See the [attached file](https://github.com/geodynamics/aspect/files/5019414/MJG_and_EGP_2020_AGU_Abstract.pdf) that [@egpuckett](https://github.com/egpuckett) and I made for a short explanation of this algorithm and why it’s potentially useful.

In particular, just look at the two graphs. I’m not sure if you’ve seen these results before. I mentioned them (somewhat obliquely) in correspondence you and I had last fall that at least partially concerned our mutual concerns with the medical difficulties members of our parent’s generation were experiencing at the time. My Uncle and Aunt’s crisis has become much worse. ☹

Anyway, Mack and I would like to discuss this work with you when you have time. John Naliboff, Anne Glerum and Max Rudolph all have computations that we are working on to see if the algorithm will both greatly reduce the number of particles per cell and remain effective / accurate.

Best Wishes,

- Gerry