# ASPECT Newsletter #91

**URL:** <https://community.geodynamics.org/t/aspect-newsletter-91/881>\
**Category:** ASPECT\
**Created:** [November 4, 2019, 8:00pm UTC](https://community.geodynamics.org/t/aspect-newsletter-91/881 "2019-11-04T20:00:13Z")\
**Posts on this page:** 1\
**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:** [November 4, 2019, 8:00pm UTC](https://community.geodynamics.org/t/aspect-newsletter-91/881/1 "2019-11-04T20:00:13Z")

</div>

Hello everyone!

```
       This is ASPECT newsletter #91.

```

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:

[#3283](https://github.com/geodynamics/aspect/pull/3283): remove an unused variable (proposed by [tjhei](https://github.com/tjhei))  
[#3282](https://github.com/geodynamics/aspect/pull/3282): remove constraint consistency check (proposed by [tjhei](https://github.com/tjhei))  
[#3281](https://github.com/geodynamics/aspect/pull/3281): doc: remove incorrect @copydoc link (proposed by [tjhei](https://github.com/tjhei))  
[#3280](https://github.com/geodynamics/aspect/pull/3280): update parameters (proposed by [tjhei](https://github.com/tjhei); merged)  
[#3279](https://github.com/geodynamics/aspect/pull/3279): report world builder in detailed.log (proposed by [tjhei](https://github.com/tjhei); merged)  
[#3278](https://github.com/geodynamics/aspect/pull/3278): Corrected the formula in the push\_forward and pull\_back modules of the chunk geometry m… (proposed by [sibiaoliu](https://github.com/sibiaoliu))  
[#3276](https://github.com/geodynamics/aspect/pull/3276): [WIP] Use phases for diffusion viscosity (proposed by [gassmoeller](https://github.com/gassmoeller))  
[#3275](https://github.com/geodynamics/aspect/pull/3275): add tests (proposed by [naliboff](https://github.com/naliboff); merged)  
[#3274](https://github.com/geodynamics/aspect/pull/3274): Reverse order natural coordinates (proposed by [anne-glerum](https://github.com/anne-glerum); merged)  
[#3273](https://github.com/geodynamics/aspect/pull/3273): [WIP] Use phase functions for EoS in visco\_plastic material model (proposed by [gassmoeller](https://github.com/gassmoeller))  
[#3272](https://github.com/geodynamics/aspect/pull/3272): Add ASPECT publications (proposed by [gassmoeller](https://github.com/gassmoeller); merged)  
[#3271](https://github.com/geodynamics/aspect/pull/3271): Let phase function handle compositions (proposed by [gassmoeller](https://github.com/gassmoeller))  
[#3269](https://github.com/geodynamics/aspect/pull/3269): more c++ override (proposed by [tjhei](https://github.com/tjhei); merged)  
[#3267](https://github.com/geodynamics/aspect/pull/3267): Extend parse function to allow multiple values per key (proposed by [gassmoeller](https://github.com/gassmoeller); merged)  
[#3266](https://github.com/geodynamics/aspect/pull/3266): Correct inflow boundary condition for Volume of fluid method (proposed by [class4kayaker](https://github.com/class4kayaker); merged)  
[#3264](https://github.com/geodynamics/aspect/pull/3264): Add option to turn off dynamic topography contribution in geoid calculation (proposed by [Shangxin-Liu](https://github.com/Shangxin-Liu); merged)  
[#3232](https://github.com/geodynamics/aspect/pull/3232): Make particle properties visualization optional (proposed by [MFraters](https://github.com/MFraters); merged)

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

[#3277](https://github.com/geodynamics/aspect/issues/3277) ellipsoidal chunk functions: update literature or conform code to current literature. (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/).
```