# ASPECT **URL:** https://community.geodynamics.org/c/aspect/13.md [Latest](https://community.geodynamics.org/latest.md) · [Categories](https://community.geodynamics.org/categories.md) · [Tags](https://community.geodynamics.org/tags.md) --- ## [Regular User Meeting](https://community.geodynamics.org/t/regular-user-meeting/2467)
**Author:** [@gassmoeller](https://community.geodynamics.org/u/gassmoeller)\ **Replies:** 77\ **Last updated:** [September 18, 2026, 2:49pm UTC](https://community.geodynamics.org/t/regular-user-meeting/2467 "2026-09-18T14:49:06Z")
Hi all, After a pause due to the ASPECT hackathon and some travel plans, we are back on schedule for a biweekly one hour user meeting tomorrow. The meetings are open to anyone interested in the development and applicat… --- ## [Asking for feedback about the new forum](https://community.geodynamics.org/t/asking-for-feedback-about-the-new-forum/100)
**Author:** [@gassmoeller](https://community.geodynamics.org/u/gassmoeller)\ **Replies:** 13\ **Last updated:** [October 9, 2018, 7:03pm UTC](https://community.geodynamics.org/t/asking-for-feedback-about-the-new-forum/100 "2018-10-09T19:03:45Z")
Since we are just introducing this new technology, we would like to ask for feedback about the transition to the forum. In particular: Do you find the organization of the forum sufficiently organized, or do you have sp… --- ## [About the ASPECT category](https://community.geodynamics.org/t/about-the-aspect-category/45)
**Author:** [@cig-admin](https://community.geodynamics.org/u/cig-admin)\ **Replies:** 15\ **Last updated:** [July 29, 2020, 7:47am UTC](https://community.geodynamics.org/t/about-the-aspect-category/45 "2020-07-29T07:47:03Z")
Discuss ASPECT. Get installation help. Ask questions about models. Start a discussion on new and/or existing features. Please read our guide on asking questions before opening a new topic: Contributing to ASPECT — ASPEC… --- ## [ASPECT 3.1.0 released](https://community.geodynamics.org/t/aspect-3-1-0-released/4630)
**Author:** [@gassmoeller](https://community.geodynamics.org/u/gassmoeller)\ **Replies:** 0\ **Last updated:** [September 28, 2026, 11:33am UTC](https://community.geodynamics.org/t/aspect-3-1-0-released/4630 "2026-09-28T11:33:50Z")
We are pleased to announce the release of ASPECT 3.1.0. ASPECT is the Advanced Solver for Planetary Evolution, Convection, and Tectonics. It uses modern numerical methods such as adaptive mesh refinement, multigrid sol… --- ## [ASPECT Newsletter #245](https://community.geodynamics.org/t/aspect-newsletter-245/4628)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [September 24, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-245/4628 "2026-09-24T10:00:44Z")
Hello everyone! This is ASPECT newsletter #245. 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: … --- ## [Freezing in Katz2003\_mantle\_melting.cc](https://community.geodynamics.org/t/freezing-in-katz2003-mantle-melting-cc/4618)
**Author:** [@Clarisse\_KE](https://community.geodynamics.org/u/Clarisse_KE)\ **Replies:** 7\ **Last updated:** [September 15, 2026, 5:20pm UTC](https://community.geodynamics.org/t/freezing-in-katz2003-mantle-melting-cc/4618 "2026-09-15T17:20:24Z")
Hi, I am a french PhD student working on continental rifting and melt migration. I have a question about the implementation of freezing when using fractional melting in the Katz2003MantleMelting material model. Accordi… --- ## [Negative diffusion viscosity detected,bug about velocity boundary](https://community.geodynamics.org/t/negative-diffusion-viscosity-detected-bug-about-velocity-boundary/4620)
**Author:** [@guit-hub](https://community.geodynamics.org/u/guit-hub)\ **Replies:** 7\ **Last updated:** [September 15, 2026, 3:08am UTC](https://community.geodynamics.org/t/negative-diffusion-viscosity-detected-bug-about-velocity-boundary/4620 "2026-09-15T03:08:28Z")
Dear developers: I hope you’re doing everything well.When I run a model like this: I want set velocity boundary conditions like this: 0-140km,left,zero velocity,right,v\_x=influx,v\_y=0 140-450km,left and right,v\_y=… --- ## [ASPECT Newsletter #244](https://community.geodynamics.org/t/aspect-newsletter-244/4622)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [September 10, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-244/4622 "2026-09-10T10:00:50Z")
Hello everyone! This is ASPECT newsletter #244. 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: … --- ## [Quartz CPO Plotting help on ASPECT](https://community.geodynamics.org/t/quartz-cpo-plotting-help-on-aspect/4379)
**Author:** [@Charbak22](https://community.geodynamics.org/u/Charbak22)\ **Replies:** 1\ **Last updated:** [September 1, 2026, 6:55am UTC](https://community.geodynamics.org/t/quartz-cpo-plotting-help-on-aspect/4379 "2026-09-01T06:55:33Z")
Hello everyone, I am planning to do some Quartz CPO-related modelling on the upper crystal flow. I know that the CPO for Olivine is there in ASPECT. I am not sure how to do it for quartz. May I get some help? I know th… --- ## [Mesh refinement and efficiency](https://community.geodynamics.org/t/mesh-refinement-and-efficiency/4612)
**Author:** [@DebanjanPal1995](https://community.geodynamics.org/u/DebanjanPal1995)\ **Replies:** 11\ **Last updated:** [August 27, 2026, 2:40pm UTC](https://community.geodynamics.org/t/mesh-refinement-and-efficiency/4612 "2026-08-27T14:40:31Z")
Hi Forum, Till now, I have been running models with moderate resolution, and these run reasonably fast on the medium-range cluster. A 200 Myr run takes around 1.5 weeks to complete using 160 cores using the gridding bel… --- ## [ASPECT Newsletter #243](https://community.geodynamics.org/t/aspect-newsletter-243/4615)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [August 25, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-243/4615 "2026-08-25T10:00:37Z")
Hello everyone! This is ASPECT newsletter #243. 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: … --- ## [Request for feedback on an experimental ASPECT learning and modeling workflow for geoscience students](https://community.geodynamics.org/t/request-for-feedback-on-an-experimental-aspect-learning-and-modeling-workflow-for-geoscience-students/4608)
**Author:** [@YUAN](https://community.geodynamics.org/u/YUAN)\ **Replies:** 0\ **Last updated:** [August 13, 2026, 5:10pm UTC](https://community.geodynamics.org/t/request-for-feedback-on-an-experimental-aspect-learning-and-modeling-workflow-for-geoscience-students/4608 "2026-08-13T17:10:05Z")
Hello ASPECT community, I have been working on an early experimental project called Aspect\_Yuan.skill: The project is intended primarily for geology and geophysics students who are interested in computational geodyna… --- ## [Issue with Compositional Fields when using Multicomponent Material Model with Ascii Initial Composition](https://community.geodynamics.org/t/issue-with-compositional-fields-when-using-multicomponent-material-model-with-ascii-initial-composition/4593)
**Author:** [@acol-63](https://community.geodynamics.org/u/acol-63)\ **Replies:** 10\ **Last updated:** [August 7, 2026, 5:02am UTC](https://community.geodynamics.org/t/issue-with-compositional-fields-when-using-multicomponent-material-model-with-ascii-initial-composition/4593 "2026-08-07T05:02:40Z")
Hi all! I’m new to ASPECT and trying to recreate the initial conditions of this paper https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2015tc003908 (Flat-slab subduction, topography, and mantle dynamics in south… --- ## [Benchmark issues](https://community.geodynamics.org/t/benchmark-issues/4585)
**Author:** [@optimux](https://community.geodynamics.org/u/optimux)\ **Replies:** 16\ **Last updated:** [July 29, 2026, 2:25pm UTC](https://community.geodynamics.org/t/benchmark-issues/4585 "2026-07-29T14:25:38Z")
Hello everyone, Hope you’re doing great. I have been trying to justify that I understand ASPECT a little bit by doing benchmark against some papers with my own plugins. However, it turns out that I probably don’t unders… --- ## [Aspect Geoid Test](https://community.geodynamics.org/t/aspect-geoid-test/4582)
**Author:** [@DebanjanPal1995](https://community.geodynamics.org/u/DebanjanPal1995)\ **Replies:** 3\ **Last updated:** [July 24, 2026, 4:37pm UTC](https://community.geodynamics.org/t/aspect-geoid-test/4582 "2026-07-24T16:37:38Z")
In my current work, I am using geoid to evaluate time-dependent mantle convection models. The models are compressible. I found that the geoid pattern and amplitude are reproduced reasonably well when I use the Simple C… --- ## [Strange error print when using a plug-in](https://community.geodynamics.org/t/strange-error-print-when-using-a-plug-in/4581)
**Author:** [@harrietlau](https://community.geodynamics.org/u/harrietlau)\ **Replies:** 9\ **Last updated:** [July 22, 2026, 8:40pm UTC](https://community.geodynamics.org/t/strange-error-print-when-using-a-plug-in/4581 "2026-07-22T20:40:17Z")
Hi ASPECT, A colleague (the HPC pro at Brown) and I (just a user) are having some strange issues with the recent install of ASPECT. He updated ASPECT to 3.0 and downloaded Deal.ii. We originally ran into issues that see… --- ## [Initial condition reverse engineering](https://community.geodynamics.org/t/initial-condition-reverse-engineering/4586)
**Author:** [@optimux](https://community.geodynamics.org/u/optimux)\ **Replies:** 0\ **Last updated:** [July 22, 2026, 4:36am UTC](https://community.geodynamics.org/t/initial-condition-reverse-engineering/4586 "2026-07-22T04:36:41Z")
Hi folks, I have recently been working on a paper on thermo-chemical evolution of Mars: The early geodynamic evolution of Mars-type planets, Siqi Zhang 2016. The paper is quite clear and gives all parameters except init… --- ## [ASPECT Hanging/Stuck on a Time Step](https://community.geodynamics.org/t/aspect-hanging-stuck-on-a-time-step/4584)
**Author:** [@asrb](https://community.geodynamics.org/u/asrb)\ **Replies:** 3\ **Last updated:** [July 16, 2026, 7:52pm UTC](https://community.geodynamics.org/t/aspect-hanging-stuck-on-a-time-step/4584 "2026-07-16T19:52:15Z")
Hi all! I am requesting some help as I think I am stuck on an issue. I am running ASPECT 3.0.0 on a supercomputer cluster remotely. My setup is fairly simple: 2d annulus of the Earth, I have three main compositional fie… --- ## [ASPECT Newsletter #241](https://community.geodynamics.org/t/aspect-newsletter-241/4580)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [July 14, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-241/4580 "2026-07-14T10:00:11Z")
Hello everyone! This is ASPECT newsletter #241. 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: … --- ## [Particle for composition: too slow to start](https://community.geodynamics.org/t/particle-for-composition-too-slow-to-start/4576)
**Author:** [@optimux](https://community.geodynamics.org/u/optimux)\ **Replies:** 1\ **Last updated:** [July 6, 2026, 4:09pm UTC](https://community.geodynamics.org/t/particle-for-composition-too-slow-to-start/4576 "2026-07-06T16:09:03Z")
Hello folks, Hope you’re doing well. Recently I have been trying to reproduce Citron202 paper “Effects of Heat‐Producing Elements on the Stability of Deep Mantle Thermochemical Piles”. The paper provided prm files. I fo… --- ## [ASPECT Newsletter #240](https://community.geodynamics.org/t/aspect-newsletter-240/4572)
**Author:** [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\ **Replies:** 0\ **Last updated:** [June 24, 2026, 10:00am UTC](https://community.geodynamics.org/t/aspect-newsletter-240/4572 "2026-06-24T10:00:14Z")
Hello everyone! This is ASPECT newsletter #240. 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: … --- ## [Running Aspect on Stampede 3](https://community.geodynamics.org/t/running-aspect-on-stampede-3/4549)
**Author:** [@DebanjanPal1995](https://community.geodynamics.org/u/DebanjanPal1995)\ **Replies:** 5\ **Last updated:** [June 22, 2026, 5:13pm UTC](https://community.geodynamics.org/t/running-aspect-on-stampede-3/4549 "2026-06-22T17:13:28Z")
I am running ASPECT on Stampede3, and the models are global mantle convection simulations with imposed kinematic boundary conditions, with ~393,216 active cells and total degrees of freedom of ~16.4 million. I have test… --- ## [Entropy viscosity v.s. SUPG for energy equation](https://community.geodynamics.org/t/entropy-viscosity-v-s-supg-for-energy-equation/4545)
**Author:** [@optimux](https://community.geodynamics.org/u/optimux)\ **Replies:** 6\ **Last updated:** [June 14, 2026, 4:50pm UTC](https://community.geodynamics.org/t/entropy-viscosity-v-s-supg-for-energy-equation/4545 "2026-06-14T16:50:13Z")
Hi all, Hope you’re all doing good. I have been trying to reproduce a paper “A 3-D numerical study of the thermal evolution of the Moon after cumulate mantle overturn: The importance of rheology and core solidification”… --- ## [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: … [Next page](https://community.geodynamics.org/c/aspect/13.md?page=1)