# ASPECT **URL:** https://community.geodynamics.org/c/aspect/13.md?page=1 [Latest](https://community.geodynamics.org/latest.md) · [Categories](https://community.geodynamics.org/categories.md) · [Tags](https://community.geodynamics.org/tags.md) **Page:** 2 --- ## [ASPECT Newsletter #239](https://community.geodynamics.org/t/aspect-newsletter-239/4563)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [June 10, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-239/4563 "2026-06-10T10:00:21Z")
Hello everyone! This is ASPECT newsletter #239. 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: … --- ## [What kinds of Compositional field that ASPECT has presupposed?](https://community.geodynamics.org/t/what-kinds-of-compositional-field-that-aspect-has-presupposed/4543)
**Author:** [@guit-hub](https://community.geodynamics.org/u/guit-hub)\ **Replies:** 4\ **Last updated:** [June 9, 2026, 10:08am UTC](https://community.geodynamics.org/t/what-kinds-of-compositional-field-that-aspect-has-presupposed/4543 "2026-06-09T10:08:04Z")
I set some compositional field in custom,like this: subsection Compositional fields set Number of fields = 7 set Names of fields = upper\_crust, middle\_crust, lower\_crust, \\ lithosphere, ast… --- ## [Problem with initial viscosity in viscoplastic model](https://community.geodynamics.org/t/problem-with-initial-viscosity-in-viscoplastic-model/4561)
**Author:** [@arnie94](https://community.geodynamics.org/u/arnie94)\ **Replies:** 2\ **Last updated:** [June 9, 2026, 6:35am UTC](https://community.geodynamics.org/t/problem-with-initial-viscosity-in-viscoplastic-model/4561 "2026-06-09T06:35:46Z")
Hi everyone, I am working with the viscoplastic material model and am trying to simulate plate-like behavior in the presence of highly viscous continental material. My objective is to assign a much higher viscosity to t… --- ## [Questions about the slope setting](https://community.geodynamics.org/t/questions-about-the-slope-setting/4546)
**Author:** [@KIVY](https://community.geodynamics.org/u/KIVY)\ **Replies:** 2\ **Last updated:** [June 4, 2026, 7:06pm UTC](https://community.geodynamics.org/t/questions-about-the-slope-setting/4546 "2026-06-04T19:06:06Z")
Recently, I encountered a simulation problem related to setting the terrain boundaries as slopes. However, it was only after the experiment was completed that we discovered the issue. In the model, the slopes were implem… --- ## [Advice for users of different levels](https://community.geodynamics.org/t/advice-for-users-of-different-levels/4544)
**Author:** [@optimux](https://community.geodynamics.org/u/optimux)\ **Replies:** 2\ **Last updated:** [June 3, 2026, 3:46pm UTC](https://community.geodynamics.org/t/advice-for-users-of-different-levels/4544 "2026-06-03T15:46:23Z")
Hi ASPECTers, Hope you’re all doing well. I’m writing this post to the administrators of this forum, experienced users and developers: can we have a post that shows us, to be a common user, what we need to know; to be a… --- ## [ASPECT Newsletter #238](https://community.geodynamics.org/t/aspect-newsletter-238/4538)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [May 27, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-238/4538 "2026-05-27T10:00:25Z")
Hello everyone! This is ASPECT newsletter #238. 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: … --- ## [ASPECT Newsletter #237](https://community.geodynamics.org/t/aspect-newsletter-237/4534)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [May 13, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-237/4534 "2026-05-13T10:00:31Z")
Hello everyone! This is ASPECT newsletter #237. 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: … --- ## [High and inconsistent memory usage of advection solver](https://community.geodynamics.org/t/high-and-inconsistent-memory-usage-of-advection-solver/4208)
**Author:** [@leevit](https://community.geodynamics.org/u/leevit)\ **Replies:** 17\ **Last updated:** [May 5, 2026, 11:10am UTC](https://community.geodynamics.org/t/high-and-inconsistent-memory-usage-of-advection-solver/4208 "2026-05-05T11:10:08Z")
Hi forum, I’ve been using ASPECT already for a while for complex models. No particular memory issues have been around previously but once I added compositional fields noninitial\_plastic\_strain and plastic\_strain, memory… --- ## [Help improving the model speed](https://community.geodynamics.org/t/help-improving-the-model-speed/4525)
**Author:** [@malasad](https://community.geodynamics.org/u/malasad)\ **Replies:** 1\ **Last updated:** [April 29, 2026, 8:16pm UTC](https://community.geodynamics.org/t/help-improving-the-model-speed/4525 "2026-04-29T20:16:00Z")
Hello, I am new-ish to aspect and I am trying to set up a 2d box model that is fairly simple to start with, that I intend to add complexity to (for example, plastic yielding, layered viscosity) hence why I am using the v… --- ## [ASPECT Splinter meeting 2026 updates](https://community.geodynamics.org/t/aspect-splinter-meeting-2026-updates/4522)
**Author:** [@arijitchkc](https://community.geodynamics.org/u/arijitchkc)\ **Replies:** 1\ **Last updated:** [April 28, 2026, 1:39pm UTC](https://community.geodynamics.org/t/aspect-splinter-meeting-2026-updates/4522 "2026-04-28T13:39:43Z")
Hello all, We are excited that you will be joining us for the upcoming ASPECT splinter meeting at EGU 2026! To make the session as engaging and interactive as possible, we would love for participants to give a short (m… --- ## [Restart and compositional initialization issue](https://community.geodynamics.org/t/restart-and-compositional-initialization-issue/4512)
**Author:** [@arnie94](https://community.geodynamics.org/u/arnie94)\ **Replies:** 3\ **Last updated:** [April 27, 2026, 4:28pm UTC](https://community.geodynamics.org/t/restart-and-compositional-initialization-issue/4512 "2026-04-27T16:28:24Z")
Hi Everyone, I’m working on a global mantle convection model (spherical) where I want to include continents, but I’m intentionally not introducing them at the beginning of the simulation. The reason is that the initial … --- ## [Modeling mantle gravity](https://community.geodynamics.org/t/modeling-mantle-gravity/4521)
**Author:** [@ngu](https://community.geodynamics.org/u/ngu)\ **Replies:** 1\ **Last updated:** [April 27, 2026, 2:51am UTC](https://community.geodynamics.org/t/modeling-mantle-gravity/4521 "2026-04-27T02:51:24Z")
Is there a way of modeling mantle gravity using a crustal thickness model rather than using a fixed value for the moho. --- ## [ASPECT Newsletter #236](https://community.geodynamics.org/t/aspect-newsletter-236/4518)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [April 22, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-236/4518 "2026-04-22T10:00:15Z")
Hello everyone! This is ASPECT newsletter #236. 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: … --- ## [Grain size evolution with multiple initial composition](https://community.geodynamics.org/t/grain-size-evolution-with-multiple-initial-composition/4508)
**Author:** [@Jyotirmoy\_Paul](https://community.geodynamics.org/u/Jyotirmoy_Paul)\ **Replies:** 3\ **Last updated:** [April 10, 2026, 1:30pm UTC](https://community.geodynamics.org/t/grain-size-evolution-with-multiple-initial-composition/4508 "2026-04-10T13:30:02Z")
I am trying to make a model of continental lithosphere deformation with grain size evolution. In my box model, I have kept a rectangular block of continental lithosphere and want to see if grain size evolution change the… --- ## [Floating point exception in Trilinos ML after modifying Trilinos build flags to resolve BLAS float issue on cluster COSMA](https://community.geodynamics.org/t/floating-point-exception-in-trilinos-ml-after-modifying-trilinos-build-flags-to-resolve-blas-float-issue-on-cluster-cosma/4447)
**Author:** [@Poulami](https://community.geodynamics.org/u/Poulami)\ **Replies:** 4\ **Last updated:** [April 8, 2026, 10:45am UTC](https://community.geodynamics.org/t/floating-point-exception-in-trilinos-ml-after-modifying-trilinos-build-flags-to-resolve-blas-float-issue-on-cluster-cosma/4447 "2026-04-08T10:45:36Z")
Dear developers, I am facing a runtime issue with ASPECT on a new HPC cluster (Cosma) and would appreciate any insight. Below I describe the installation history and the problem in detail. 1. Initial problem: Trilinos… --- ## [ASPECT Newsletter #235](https://community.geodynamics.org/t/aspect-newsletter-235/4506)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [April 7, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-235/4506 "2026-04-07T10:00:20Z")
Hello everyone! This is ASPECT newsletter #235. 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: … --- ## [ASPECT Splinter Meeting at EGU 2026](https://community.geodynamics.org/t/aspect-splinter-meeting-at-egu-2026/4505)
**Author:** [@arijitchkc](https://community.geodynamics.org/u/arijitchkc)\ **Replies:** 0\ **Last updated:** [April 7, 2026, 8:39am UTC](https://community.geodynamics.org/t/aspect-splinter-meeting-at-egu-2026/4505 "2026-04-07T08:39:59Z")
Dear all, It’s that time of the year again when Vienna awaits everyone for EGU. Like every year, we are holding an ASPECT Splinter meeting in EGU on Monday, 4th May. We have made a google sheet where you can sign up and… --- ## [Environment variables or global definitions in input files?](https://community.geodynamics.org/t/environment-variables-or-global-definitions-in-input-files/4501)
**Author:** [@maxrudolph](https://community.geodynamics.org/u/maxrudolph)\ **Replies:** 4\ **Last updated:** [April 1, 2026, 2:00am UTC](https://community.geodynamics.org/t/environment-variables-or-global-definitions-in-input-files/4501 "2026-04-01T02:00:27Z")
I’m wondering - is there a way to include environment variables in ASPECT input files? I could imagine this being useful in a couple of ways - first, on TACC systems, users-specific $SCRATCH and $WORK directories are def… --- ## [How to set limiter for CG compositional fields?](https://community.geodynamics.org/t/how-to-set-limiter-for-cg-compositional-fields/4495)
**Author:** [@optimux](https://community.geodynamics.org/u/optimux)\ **Replies:** 15\ **Last updated:** [March 26, 2026, 1:25am UTC](https://community.geodynamics.org/t/how-to-set-limiter-for-cg-compositional-fields/4495 "2026-03-26T01:25:03Z")
Hi folks, After improving the convergence of Stokes subsystem, I got into another trouble. The problem is some compositional fields have negative values, which is not physically meaningful. I’m using P2CG for all compos… --- ## [Negative surface elevation throughout the whole surface in spherical shell & free surface deformation](https://community.geodynamics.org/t/negative-surface-elevation-throughout-the-whole-surface-in-spherical-shell-free-surface-deformation/4493)
**Author:** [@hyunseong96](https://community.geodynamics.org/u/hyunseong96)\ **Replies:** 6\ **Last updated:** [March 24, 2026, 4:27pm UTC](https://community.geodynamics.org/t/negative-surface-elevation-throughout-the-whole-surface-in-spherical-shell-free-surface-deformation/4493 "2026-03-24T16:27:43Z")
Hi all, I am trying to use free surface in 2D spherical shell with ice rheology. However, I currently see two points that look like numerical errors. Surface elevation ends up with negative values throughout the top … --- ## [Impossible to creare an inner core using the dynamic\_core.cc (fixed by me) function. Wrong unit of measure?](https://community.geodynamics.org/t/impossible-to-creare-an-inner-core-using-the-dynamic-core-cc-fixed-by-me-function-wrong-unit-of-measure/3910)
**Author:** [@Francyrad](https://community.geodynamics.org/u/Francyrad)\ **Replies:** 16\ **Last updated:** [March 24, 2026, 3:09pm UTC](https://community.geodynamics.org/t/impossible-to-creare-an-inner-core-using-the-dynamic-core-cc-fixed-by-me-function-wrong-unit-of-measure/3910 "2026-03-24T15:09:02Z")
Dear developers In a future paper I absolutely need to cool my CMB using the dynamic core temperature model: ################################################### # SUBSECTION: Boundary temperature model ################… --- ## [Mass and heat flux in aspect](https://community.geodynamics.org/t/mass-and-heat-flux-in-aspect/4497)
**Author:** [@lino](https://community.geodynamics.org/u/lino)\ **Replies:** 2\ **Last updated:** [March 23, 2026, 7:16am UTC](https://community.geodynamics.org/t/mass-and-heat-flux-in-aspect/4497 "2026-03-23T07:16:22Z")
Hello everyone, I’m on an internship and we are using aspect to compute the convection and the dynamic topography of Venus on a 2D box. I’m currently discovering ASPECT and I have a question, -What are the units of th… --- ## [ASPECT Newsletter #234](https://community.geodynamics.org/t/aspect-newsletter-234/4496)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [March 20, 2026, 11:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-234/4496 "2026-03-20T11:00:23Z")
Hello everyone! This is ASPECT newsletter #234. 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: … --- ## [Stokes subsystem not converged in 3D spherical shell model](https://community.geodynamics.org/t/stokes-subsystem-not-converged-in-3d-spherical-shell-model/4480)
**Author:** [@optimux](https://community.geodynamics.org/u/optimux)\ **Replies:** 17\ **Last updated:** [March 20, 2026, 8:05am UTC](https://community.geodynamics.org/t/stokes-subsystem-not-converged-in-3d-spherical-shell-model/4480 "2026-03-20T08:05:27Z")
Hello folks, Hope you all good. I’m having trouble with the convergence of Stokes subsystem. The domain is a 3D spherical shell and the system has temperature (P1), Stokes (P2xP1), 5 compositions (P1). The model can go … --- ## [The source of ASPECT sediment？](https://community.geodynamics.org/t/the-source-of-aspect-sediment/4490)
**Author:** [@Noriel](https://community.geodynamics.org/u/Noriel)\ **Replies:** 2\ **Last updated:** [March 17, 2026, 3:24pm UTC](https://community.geodynamics.org/t/the-source-of-aspect-sediment/4490 "2026-03-17T15:24:05Z")
Hello everyone, I am currently using Fastscape to simulate the surface processes of ASPECT, aiming to understand the erosion-deposition processes in orogenic belts. I have a question regarding the model results. The t… --- ## [Saving only properties of selected particles](https://community.geodynamics.org/t/saving-only-properties-of-selected-particles/4489)
**Author:** [@Theo-Geo](https://community.geodynamics.org/u/Theo-Geo)\ **Replies:** 1\ **Last updated:** [March 16, 2026, 8:03pm UTC](https://community.geodynamics.org/t/saving-only-properties-of-selected-particles/4489 "2026-03-16T20:03:34Z")
Dear Aspect community, I am currently running simulations with a lot of particles using the crystallographic preferred orientation (CPO) post processor. Ideally, I would like to save only very few of the particles as th… --- ## [Question on setting up Stokes solver parameters using Aspect 3.1.0-pre, solver fails to converge](https://community.geodynamics.org/t/question-on-setting-up-stokes-solver-parameters-using-aspect-3-1-0-pre-solver-fails-to-converge/4252)
**Author:** [@ghobson](https://community.geodynamics.org/u/ghobson)\ **Replies:** 6\ **Last updated:** [March 16, 2026, 5:13am UTC](https://community.geodynamics.org/t/question-on-setting-up-stokes-solver-parameters-using-aspect-3-1-0-pre-solver-fails-to-converge/4252 "2026-03-16T05:13:11Z")
Good afternoon all, I have some simulations that I previously ran successfully using Aspect 2.5.0 and I am now trying to run them using Aspect 3.1.0-pre. I am encountering an issue where the Stokes solver fails to conve… --- ## [Passive particles and adaptive mesh refinement](https://community.geodynamics.org/t/passive-particles-and-adaptive-mesh-refinement/4466)
**Author:** [@emunoz](https://community.geodynamics.org/u/emunoz)\ **Replies:** 8\ **Last updated:** [March 13, 2026, 10:08am UTC](https://community.geodynamics.org/t/passive-particles-and-adaptive-mesh-refinement/4466 "2026-03-13T10:08:32Z")
Hi all, I would appreciate some guidance on the use passive particles in a model with adaptive mesh refinement. I am using a modified version of the cookbook ‘continental\_extension’ to test some ASPECT features that cou… --- ## [2026 ASPECT Hackathon: Apply to Attend](https://community.geodynamics.org/t/2026-aspect-hackathon-apply-to-attend/4485)
**Author:** [@ljhwang](https://community.geodynamics.org/u/ljhwang)\ **Replies:** 0\ **Last updated:** [March 10, 2026, 5:28pm UTC](https://community.geodynamics.org/t/2026-aspect-hackathon-apply-to-attend/4485 "2026-03-10T17:28:16Z")
Applications are now open to attend the 2026 ASPECT Hackathon. Please read through all event details before beginning the application process. All participants are expected to abide by the CIG Code of Conduct. 2026… --- ## [ASPECT Newsletter #233](https://community.geodynamics.org/t/aspect-newsletter-233/4482)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [March 6, 2026, 11:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-233/4482 "2026-03-06T11:00:23Z")
Hello everyone! This is ASPECT newsletter #233. 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: … [Previous page](https://community.geodynamics.org/c/aspect/13.md) [Next page](https://community.geodynamics.org/c/aspect/13.md?page=2)