# \#convergence

**URL:** https://community.geodynamics.org/tag/convergence/151.md

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## [Dannberg et al. \[2019\] Ridge melt migration model failing in SolverCG](https://community.geodynamics.org/t/dannberg-et-al-2019-ridge-melt-migration-model-failing-in-solvercg/4473)

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**Author:** [@gito](https://community.geodynamics.org/u/gito)\
**Replies:** 1\
**Last updated:** [February 28, 2026, 5:28am UTC](https://community.geodynamics.org/t/dannberg-et-al-2019-ridge-melt-migration-model-failing-in-solvercg/4473 "2026-02-28T05:28:50Z")

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Hello, ASPECT 3.1.0-pre is not solving timestep 0 of the Dannberg et al. \[2019\], mid-ocean ridge melting model. It produces solutions, but when it gets down to the last refinement level the BlockSchurPreconditioner fai…

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## [Boundary velocity (flow in at bottom) leads to a failure of convergence](https://community.geodynamics.org/t/boundary-velocity-flow-in-at-bottom-leads-to-a-failure-of-convergence/3627)

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**Author:** [@optimux](https://community.geodynamics.org/u/optimux)\
**Replies:** 5\
**Last updated:** [September 10, 2024, 2:16am UTC](https://community.geodynamics.org/t/boundary-velocity-flow-in-at-bottom-leads-to-a-failure-of-convergence/3627 "2024-09-10T02:16:59Z")

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Hi all, Hope you’re doing well. I’m pretty new to ASPECT tbh and I’m trying to reproduce plume cases in an early paper of Dr. Dannberg (Compressible magma/mantle dynamics: 3-D, adaptive simulations in ASPECT, GJI 2016).…